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Hormones
A hormone is a chemical substance produced by a gland that is transported by the blood and modifies the function of specific target organs.
6
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60
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42
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90 min
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CambridgeIGCSEBiologyCoordination and response
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Hormones outcomes6 objectives
- A hormone is a chemical substance produced by a gland that is transported by the blood and modifies the function of specific target organs.
- In diagrams and images, identify specific endocrine glands and name the hormones they produce, including: (a) adrenal glands producing adrenaline (b) pancreas producing insulin (c) testes producing testosterone (d) ovaries producing oestrogen.
- Adrenaline is the hormone released during 'fight or flight' responses, which causes effects such as: (a) an increase in breathing rate (b) an increase in heart rate (c) an increase in pupil size.
- Contrast the mechanisms of nervous and hormonal control, focusing on the speed of response and the duration of effects.
- Glucagon is a hormone that is secreted by the pancreas.
- Adrenaline plays a role in regulating metabolic activity by: (a) raising blood glucose levels (b) increasing heart rate.
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