There are important differences between nervous and hormonal control.
What is the duration of response for nervous and hormonal control?
Nervous: Short (until nerve impulses stop)
Hormonal: Long (until hormone is broken down)
Key Terms
There are important differences between nervous and hormonal control.
What is the duration of response for nervous and hormonal control?
Nervous: Short (until nerve impulses stop)
Hormonal: Long (until hormone is broken down)
Different hormones
The glands in the body produce a range of different chemical hormones that travel in the bloodstream and affect a number of different organs in the...
Examples of important hormones released into the bloodstream.
Important hormones released into the bloodstream include ADH (anti-diuretic hormone), adrenaline and insulin.
What hormone does the thyroid gland produce?
thyroxine
What hormone does the pancreas produce?
insulin
What hormone do the testes produce?
testosterone
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| Term | Definition |
|---|---|
There are important differences between nervous and hormonal control. | Nervous: Short (until nerve impulses stop) Hormonal: Long (until hormone is broken down) |
Different hormones | The glands in the body produce a range of different chemical hormones that travel in the bloodstream and affect a number of different organs in the body. The diagram below shows this in detail. |
Examples of important hormones released into the bloodstream. | Important hormones released into the bloodstream include ADH (anti-diuretic hormone), adrenaline and insulin. |
What hormone does the thyroid gland produce? | thyroxine |
What hormone does the pancreas produce? | insulin |
What hormone do the testes produce? | testosterone |
What hormone do the ovaries produce? | oestrogen |
What hormone do the adrenal glands produce? | adrenaline |
Pituitary gland | The 'master gland' situated at the base of the brain |
What hormone does the pituitary gland produce? | ADH |
What is the source of the hormone ADH? | Pituitary gland |
What is the source of the hormone adrenaline? | Adrenal glands |
What is the source of the hormone insulin? | Pancreas |
What is the target organ(s) of AHD? | Kidneys |
What are the target organs of adrenaline? | Several targets including organs in the respiratory and circulatory systems |
What is the target organ of insulin? | Liver |
What is the role of the hormone ADH? | Controlling the water content of the blood |
What is the role of the hormone adrenaline? | Preparation for 'fight or flight' |
What is the role of the hormone insulin? | Controlling blood glucose levels |
What is the effect of ADH? | Increases reabsorption of water by the collecting ducts |
What are the effects of adrenaline? | Increases breathing rate, heart rate, flow of blood to muscles, conversion of glycogen to glucose |
What is the effect of insulin? | Increases conversion of glucose into glycogen for storage |
Master gland | The pituitary gland in the brain is known as a 'master gland'. It secretes several hormones into the blood in response to the body's condition, such as blood water levels. The hypothalamus detects changes in hormone levels and will release hormones which control the pituitary gland or other organs. The hormones from the hypothalamus and pituitary can also act on other glands to stimulate the release of different types of hormones and bring about effects. |
Coordination and control - The human endocrine system | overview | The endocrine system secretes hormones into the bloodstream from glands throughout the body. Hormones travel in the blood stream to specific target organs, where they have an effect. |
Homeostatic control | In animals, conditions such as water concentration, temperature, and glucose concentration must be kept as constant as possible. Control systems that keep such conditions constant are examples of homeostasis; this is the maintenance of constant internal conditions in an organism. |