APII Test 1 part 1
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the chemical messengers in the nervous system are neurotransmitters. in the endocrine system they are_________.
how do hormones get to their targets?
travel in the blood
do a hormone affect every cell in the boyd?
only those with receptors for that particular hormone
control of the pituitary gland is by the ______.
how does it (hypothalamus) exert this control?
releasing hormones produced by the hypothalamus travel down the pituitary stalk in the blood to the anterior pituitary where they trigger the release of the hormones of the anterior pituitary
neurotransmitter produced in the hypothalamus travel down axon that end in the posterior pituitary
what kind of hormone is cortisol?
what kind of hormone is thyroxine?
amino acid derivatives
what kind of hormone is insulin?
what is the basic difference between steriod and protein hormones?
steroids can enter the cell (hyper-phobic), proteins can't (hyperphlic)
what is down regulation?
target cells decrease the number of hormone receptors in response to a sustained high level of the hormone (removing hormone receptors)
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