Glucagon's role in the body is to prevent blood glucose levels dropping too low. To do this, it acts on the liver in several ways: It stimulates the conversion
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___________ are coiled tubes that secrete sweat through a sweat duct.
Sweat glands
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The condition of having high glucose concentration in the blood.
hyperglycemia
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Secreted sweat contains ______________, _____________ and small amount of ____________.
water, salts and urea.
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Not eating carbohydrate for a long time will cause hypoglycemia and the person feels
Very tired, confused and shows irrational behavior. Eventually, the person becomes unconscious.
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these groups of cells are scattered through the pancreas to make two hormones.
islets of Langerhans
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How do hormones travel the body?
Hormones travel throughout the body, either in the blood stream or in the fluid around cells, looking for target cells.
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25
How does the central nervous system and the thermoreceptors coordinate in coping with heat gain?
When the external temperature rises above normal levels, thermoreceptors within the skin send signals to the hypothalamus in the brain. The hypothalamus is
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What are the 2 layers of skin?
epidermis and dermis
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25
Explain the difference between vasoconstriction and vasodilation.
Vasoconstriction is the constriction/ contraction of smooth muscles in the arteriole walls. It decreases in size, reducing blood flow.
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How is heat removed from our body?
Through evaporation of sweat
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This is the insoluble form of carbohydrates that is stored in the liver.
glycogen
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25
If your body temperature falls below 37 degree C, nerve impulses from the hypothalamus cause the following things to happen like _______________________ (hairs) and _________________________((arterioles).
hairs erect to trap a layer of warm air which insulate it and arterioles constrict so not much blood flows through them, thus conserving heat
