Hormonal coordination in humans key terms

endocrine system

A system of glands that secrete hormones directly into the bloodstream to regulate various bodily functions.

hormones

Chemical messengers produced by glands in the endocrine system that travel through the bloodstream to target organs, influencing physiological processes.

hormones

Chemical messengers that travel in the bloodstream to target organs, where they produce specific effects.

target organs

Specific organs that respond to hormones, receiving signals that trigger particular physiological effects.

Hormonal coordination

A slower and longer-lasting response mechanism in the body that uses hormones to regulate physiological processes.

Nervous coordination

A rapid response mechanism in the body that uses electrical signals transmitted through neurons to control immediate actions.

pituitary gland

The master gland of the endocrine system that secretes several hormones directly into the bloodstream.

hormones

Chemical messengers produced by glands in the endocrine system that regulate various functions in the body.

pituitary hormones

Hormones secreted by the pituitary gland that regulate the function of other endocrine glands.

stimulate

To encourage or activate the release of hormones from other glands in the endocrine system.

endocrine glands

Glands that secrete hormones directly into the bloodstream, including the pituitary gland, pancreas, thyroid, adrenal gland, ovaries, and testes.

hormones

Chemical messengers produced by endocrine glands that travel through the bloodstream to target organs, regulating various body functions.

hormones

Chemical messengers that are secreted by glands in the endocrine system and travel in the bloodstream to target organs, coordinating various body functions.

chemical messengers

Substances, such as hormones, that transmit signals between cells and organs to regulate physiological processes in the body.

target organs

In Human endocrine system, target organs means specific organs that hormones travel to in order to exert their effects. This matters in Hormonal coordination in humans because it supports the learning objective to apply knowledge of target organs to explain why hormones affect only specific tissues. Use target organs only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

hormonal specificity

The concept that hormones only affect particular tissues or organs that have the appropriate receptors.

Pancreas

The organ that monitors and regulates blood glucose concentration by secreting hormones such as insulin and glucagon.

Blood glucose concentration

The level of glucose present in the blood, which is controlled by the pancreas to maintain homeostasis.

Insulin

A hormone secreted by the pancreas that helps regulate blood glucose levels by facilitating the uptake of glucose into cells.

Pancreas

An organ that monitors and controls blood glucose concentration by secreting hormones such as insulin.

insulin

A hormone produced by the pancreas that facilitates the uptake of glucose from the blood into cells.

glucose transport

The process by which glucose moves from the bloodstream into cells, primarily facilitated by insulin.

insulin

A hormone secreted by the pancreas that regulates blood glucose levels by facilitating the conversion of excess glucose into glycogen.

glycogen

A stored form of glucose found in the liver and muscles, which can be converted back into glucose when energy is needed.

Type 1 diabetes

A disorder characterized by the pancreas failing to produce sufficient insulin, leading to high blood glucose levels.

Insulin

A hormone produced by the pancreas that regulates blood glucose levels by facilitating the uptake of glucose into cells.

insulin injections

Insulin injections are a method of delivering insulin to individuals with Type 1 diabetes to help regulate blood glucose levels.

blood glucose concentration

Blood glucose concentration refers to the amount of glucose present in the bloodstream, which needs to be maintained within a specific range for proper bodily function.

Type 2 diabetes

A disorder in which body cells no longer respond properly to insulin, leading to elevated blood glucose levels.

insulin

A hormone produced by the pancreas that regulates blood glucose levels by facilitating the uptake of glucose into cells.

carbohydrate-controlled diet

A dietary approach that limits carbohydrate intake to help manage blood glucose levels, particularly in individuals with Type 2 diabetes.

exercise

Physical activity that can improve insulin sensitivity and aid in the regulation of blood glucose levels, beneficial for individuals with Type 2 diabetes.

obesity

A condition characterized by excessive body fat, which increases the risk of developing various health issues, including Type 2 diabetes.

Type 2 diabetes

A metabolic disorder where the body becomes resistant to insulin or doesn't produce enough insulin, often associated with obesity.

Type 1 diabetes

A disorder in which the pancreas fails to produce enough insulin, leading to high blood glucose levels.

Type 2 diabetes

A disorder where body cells no longer respond properly to insulin, often associated with obesity and lifestyle factors.

diabetes

A medical condition characterized by high blood glucose levels due to insufficient insulin production or ineffective use of insulin by the body.

obesity

A condition of excessive body fat that increases the risk of health problems, often linked to lifestyle choices and dietary habits.

blood glucose concentration

The level of glucose present in the blood, which is monitored and regulated by hormones such as insulin and glucagon.

graph interpretation

The process of analyzing graphical representations of data to understand trends and changes in blood glucose levels before and after meals or treatments.

glucagon

A hormone secreted by the pancreas that raises blood glucose levels by promoting the conversion of glycogen to glucose when blood glucose concentration is too low.

pancreas

An organ that monitors and regulates blood glucose concentration by secreting hormones such as insulin and glucagon.

glucagon

A hormone secreted by the pancreas that stimulates the conversion of glycogen back into glucose when blood glucose levels are low.

glycogen

A stored form of glucose found in the liver and muscles, which can be converted back into glucose when needed.

insulin

A hormone secreted by the pancreas that lowers blood glucose concentration by facilitating the uptake of glucose into cells.

glucagon

A hormone secreted by the pancreas that raises blood glucose concentration by stimulating the conversion of glycogen to glucose in the liver.

osmosis

The movement of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

ion balance

The regulation of ion concentrations in the body to maintain homeostasis and prevent cellular dysfunction.

water loss

The process by which water is expelled from the body, particularly through exhalation from the lungs and evaporation from the skin in sweat.

sweat

A fluid produced by sweat glands in the skin that helps regulate body temperature and facilitates water loss.

sweat

A fluid produced by sweat glands in the skin that helps regulate body temperature and excretes water, ions, and urea.

urea

In Maintaining water and nitrogen balance in the body (biology only), urea means a waste product formed from the breakdown of proteins, which is excreted in sweat and urine. This matters in Hormonal coordination in humans because it supports the learning objective to describe water, ions and urea loss from the skin in sweat. Use urea only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

water loss

The process by which water is expelled from the body, particularly through the lungs during exhalation and from the skin in sweat.

osmosis

The movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration, which affects water levels in body cells.

kidneys

In Maintaining water and nitrogen balance in the body (biology only), kidneys means organs that filter blood to remove excess water, ions, and urea, producing urine. This matters in Hormonal coordination in humans because it supports the learning objective to describe the kidneys as organs that remove excess water, ions and urea from the blood in urine. Use kidneys only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

urea

In Maintaining water and nitrogen balance in the body (biology only), urea means a waste product formed from the breakdown of proteins, excreted in urine. This matters in Hormonal coordination in humans because it supports the learning objective to describe the kidneys as organs that remove excess water, ions and urea from the blood in urine. Use urea only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

internal balance

The state in which the body's internal environment remains stable and optimal for cellular function, achieved by regulating water, ions, and urea levels.

excess removal

The process of eliminating surplus water, ions, and urea from the body to maintain homeostasis and prevent toxicity.

proteins

Large molecules made up of amino acids that are essential for the structure and function of body tissues.

amino acids

The building blocks of proteins, which are produced during the digestion of proteins and cannot be stored in excess.

deamination

The process in the liver where the amino group is removed from excess amino acids, resulting in the production of ammonia.

ammonia

A toxic substance produced during deamination that must be converted into urea for safe excretion from the body.

ammonia

A toxic compound produced from the breakdown of proteins that must be converted into urea for safe excretion.

urea

A less toxic compound formed from ammonia in the liver, which is excreted from the body through urine.

kidney function

The process by which the kidneys filter blood to remove waste products and excess substances, followed by the selective reabsorption of useful substances back into the bloodstream.

selective reabsorption

The process in the kidneys where certain substances, such as glucose and ions, are reabsorbed from the filtrate back into the blood, ensuring that essential nutrients are retained.

kidney structure

The physical anatomy of the kidneys, which is not required for students to know in detail.

nephron structure

The detailed anatomy of nephrons, the functional units of the kidney, which students are not required to know in detail.

urea

A waste product formed in the liver from the breakdown of proteins, which is excreted in urine.

urine

In Maintaining water and nitrogen balance in the body (biology only), urine means a liquid waste product produced by the kidneys that contains water, urea, and various ions. This matters in Hormonal coordination in humans because it supports the learning objective to interpret data comparing concentrations of glucose, ions and urea in blood, filtrate and urine. Use urine only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

ADH

Antidiuretic hormone (ADH) is a hormone that regulates water balance in the body by controlling the permeability of kidney tubules.

permeability

Permeability refers to the ability of kidney tubules to allow water to pass through, which is influenced by the presence of ADH.

ADH

Antidiuretic hormone (ADH) is a hormone that helps regulate water balance in the body by controlling the permeability of kidney tubules.

negative feedback

Negative feedback is a control mechanism in which a change in a physiological variable triggers responses that counteract the initial change, helping to maintain homeostasis.

kidney dialysis

A medical treatment that removes urea and balances ions from the blood for individuals with kidney failure.

urea

A waste product formed from the breakdown of proteins, which is removed from the blood during kidney dialysis.

kidney dialysis

A medical treatment that removes waste products, excess water, and balances ions in patients with kidney failure.

kidney transplant

A surgical procedure to replace a failing kidney with a healthy kidney from a donor.

testosterone

The main male reproductive hormone produced by the testes, responsible for the development of male secondary sexual characteristics and the stimulation of sperm production.

testes

In Hormones in human reproduction, testes means the male reproductive organs that produce sperm and secrete testosterone. This matters in Hormonal coordination in humans because it supports the learning objective to describe testosterone as the main male reproductive hormone produced by the testes. Use testes only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

testosterone

The main male reproductive hormone produced by the testes, responsible for stimulating sperm production and controlling male secondary sexual characteristics at puberty.

puberty

The developmental stage during which individuals experience physical changes, including the maturation of reproductive organs and the development of secondary sexual characteristics, influenced by hormones such as testosterone.

Oestrogen

The main female reproductive hormone produced by the ovaries, involved in regulating the menstrual cycle and controlling female secondary sexual characteristics.

Menstrual cycle

The monthly series of changes in hormone levels and physiological processes in females, regulated by hormones such as oestrogen.

Oestrogen

A hormone produced by the ovaries that controls female secondary sexual characteristics during puberty and plays a key role in the menstrual cycle.

Menstrual cycle

The monthly cycle in females that involves the preparation of the uterus for potential pregnancy, regulated by hormones including oestrogen.

FSH

Follicle Stimulating Hormone (FSH) is a hormone produced by the pituitary gland that stimulates the maturation of eggs in the ovaries.

ovary

An ovary is a female reproductive organ that produces eggs and hormones, including oestrogen and progesterone.

LH

Luteinizing hormone (LH) is a hormone produced by the pituitary gland that triggers ovulation in females.

ovulation

Ovulation is the process in which a mature egg is released from the ovary, typically occurring mid-cycle in the menstrual cycle.

Oestrogen

A hormone produced by the ovaries that regulates female secondary sexual characteristics and is involved in the menstrual cycle.

Progesterone

A hormone produced by the ovaries that helps maintain the uterus lining during the menstrual cycle and supports pregnancy.

FSH

In Hormones in human reproduction, FSH means follicle Stimulating Hormone, a hormone that stimulates the maturation of eggs in the ovaries. This matters in Hormonal coordination in humans because it supports the learning objective to explain (HT only) how FSH, oestrogen, LH and progesterone interact during the menstrual cycle. Use FSH only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

LH

In Hormones in human reproduction, LH means luteinizing Hormone, a hormone that triggers ovulation and the release of eggs from the ovaries. This matters in Hormonal coordination in humans because it supports the learning objective to explain (HT only) how FSH, oestrogen, LH and progesterone interact during the menstrual cycle. Use LH only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

menstrual cycle

The monthly series of changes in hormone levels that regulate ovulation and menstruation in females.

hormone levels

The concentrations of specific hormones in the bloodstream that fluctuate during the menstrual cycle, influencing reproductive processes.

hormonal contraception

Methods of contraception that use hormones to prevent ovulation and regulate the menstrual cycle.

non-hormonal contraception

Methods of contraception that do not involve hormones, such as barrier methods and abstinence.

oral contraceptives

Hormonal methods that contain hormones to inhibit FSH production, preventing the maturation of eggs.

FSH

Follicle-stimulating hormone, a hormone that is inhibited by oral contraceptives to prevent egg maturation.

progesterone

A hormone involved in the menstrual cycle that inhibits egg maturation and release when delivered through injections, implants, or skin patches.

contraceptive methods

Various techniques, including hormonal methods like injections and implants, that prevent pregnancy by inhibiting egg maturation and release.

barrier methods

Contraceptive methods that physically prevent sperm from reaching an egg, including condoms and diaphragms.

condom

A barrier method of contraception that is worn on the penis or inside the vagina to prevent sperm from entering the uterus.

intrauterine device

A contraceptive device inserted into the uterus to prevent implantation of an embryo or to release hormones.

implant

A hormonal contraceptive method that is placed under the skin to release hormones that inhibit egg maturation and release.

spermicidal agents

In Contraception, spermicidal agents means chemicals that kill or disable sperm to prevent fertilization. This matters in Hormonal coordination in humans because it supports the learning objective to describe spermicidal agents as chemicals that kill or disable sperm. Use spermicidal agents only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

contraception

Methods used to prevent pregnancy by inhibiting sperm from reaching an egg or preventing ovulation.

abstinence

The practice of refraining from sexual intercourse, particularly during the time when an egg may be present in the oviduct.

behavioural contraception

Methods of contraception that rely on changes in sexual behavior to prevent pregnancy, such as abstaining from intercourse.

sterilisation

A surgical method of contraception that permanently prevents pregnancy by blocking or sealing the reproductive pathways.

contraception

In Contraception, contraception means methods or devices used to prevent pregnancy during or following sexual intercourse. This matters in Hormonal coordination in humans because it supports the learning objective to describe sterilisation as a surgical method of contraception. Use contraception only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

contraception

Methods used to prevent pregnancy, which can raise personal, social, economic, and environmental considerations.

ethical considerations

Moral implications and debates surrounding the use of contraception, including access, rights, and societal impacts.

effectiveness

In Contraception, effectiveness means the degree to which a contraception method successfully prevents pregnancy. This matters in Hormonal coordination in humans because it supports the learning objective to evaluate different contraception methods using effectiveness, risk, convenience and ethical considerations. Use effectiveness only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

ethical considerations

The moral implications and societal values that influence the choice and acceptance of contraception methods.

FSH

In The use of hormones to treat infertility (HT only), FSH means follicle Stimulating Hormone, a hormone that stimulates the maturation of eggs in the ovaries. This matters in Hormonal coordination in humans because it supports the learning objective to explain (HT only) how fertility drugs containing FSH and LH can stimulate eggs to mature. Use FSH only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

LH

LH, or luteinising hormone, is used in infertility treatment with FSH to support egg maturation and ovulation. In this HT-only fertility context, LH is part of the hormone treatment sequence before eggs are collected for IVF.

IVF

In vitro fertilization (IVF) is a medical procedure that involves stimulating egg production with hormones, collecting the eggs, fertilizing them in a laboratory, and transferring the resulting embryos into the uterus.

FSH

Follicle-stimulating hormone (FSH) is a hormone that stimulates the maturation of eggs in the ovaries and is used in fertility treatments to promote egg development.

microscopy

A technique used to observe small objects, such as embryos, under magnification to monitor their development during IVF.

IVF

In vitro fertilization, a medical procedure where eggs are fertilized by sperm outside the body and embryos are transferred to the uterus.

IVF treatment

A medical procedure where one or two embryos are inserted into the mother's uterus to assist with conception.

embryo transfer

The process of placing embryos into the uterus during in vitro fertilization (IVF) to achieve pregnancy.

IVF

In vitro fertilization (IVF) is a medical procedure that involves stimulating the ovaries to produce eggs, collecting the eggs, fertilizing them in a laboratory, and transferring the resulting embryos into the uterus to assist individuals with infertility in achieving pregnancy.

infertility

Infertility is the inability to conceive after one year of unprotected intercourse, which may result from various factors affecting either partner's reproductive health.

fertility treatment

Medical procedures aimed at helping individuals or couples conceive children, which may include hormonal therapies and assisted reproductive technologies.

patient perspective

The viewpoint and experiences of individuals undergoing fertility treatment, including their emotional, physical, and psychological responses to the process.

fertility treatment

Medical procedures aimed at assisting individuals or couples in achieving pregnancy, often involving hormonal therapies.

healthcare providers

Professionals who deliver medical services and support, including doctors, nurses, and specialists involved in fertility treatments.

IVF

In vitro fertilization (IVF) is a medical procedure where eggs are fertilized by sperm outside the body and then implanted into the uterus.

emotional stress

Emotional stress refers to the psychological strain and anxiety experienced by individuals undergoing fertility treatments, such as IVF.

IVF

In vitro fertilization (IVF) is a medical procedure that involves fertilizing eggs with sperm outside the body and transferring the resulting embryos into the uterus.

low success rate

The low success rate refers to the relatively small percentage of IVF cycles that result in a successful pregnancy, often due to various biological and procedural factors.

IVF

In vitro fertilization (IVF) is a medical procedure that involves fertilizing an egg with sperm outside the body and transferring the resulting embryo into the uterus.

ethical considerations

Ethical considerations refer to the moral implications and societal impacts associated with the use of IVF and embryo manipulation, including issues of consent, potential for multiple births, and the status of embryos.

thyroxine

A hormone produced by the thyroid gland that regulates metabolism and stimulates the basal metabolic rate.

basal metabolic rate

The rate of energy expenditure per unit time by endothermic animals at rest in a neutrally temperate environment.

thyroxine

A hormone produced by the thyroid gland that regulates metabolism and plays a crucial role in growth and development.

growth and development

The processes by which organisms increase in size and mature, influenced by hormones such as thyroxine.

thyroxine

A hormone produced by the thyroid gland that regulates metabolism and is involved in growth and development.

negative feedback

A control mechanism in which a change in a physiological variable triggers responses that counteract the initial change, helping to maintain homeostasis.

adrenaline

A hormone secreted by the adrenal glands in response to fear or stress, which prepares the body for 'fight or flight' by increasing heart rate and oxygen delivery.

adrenal glands

Glands located on top of the kidneys that produce hormones, including adrenaline, which are involved in the body's response to stress.

adrenaline

A hormone secreted by the adrenal glands that increases heart rate and enhances oxygen and glucose delivery to the brain and muscles during stress or fear.

heart rate

The number of times the heart beats per minute, which is increased by adrenaline to prepare the body for rapid action.

adrenaline

A hormone secreted by the adrenal glands that prepares the body for 'fight or flight' responses during stress or fear.

flight or fight response

The physiological reaction that occurs in response to a perceived harmful event, attack, or threat, involving adrenaline release to increase heart rate and energy availability.

thyroxine

A hormone produced by the thyroid gland that regulates metabolism and plays a crucial role in growth and development.

adrenaline

A hormone secreted by the adrenal glands in response to stress or fear, increasing heart rate and energy supply to muscles.