1. A higher then normal thyroxine level in the blood inhibits secretion of some substances from the gland labelled.
a) pituitary
b) adrenal
c) pancreas
d) ovaries / testes
2. Which structures are involved in negative feedback control of adrenalin (epinephrine) secretion?
a) hypothalamus, medulla oblongata, and adrenal gland
b) pituitary gland, thyroid gland, and medulla oblongata
c) hypothalamus, pituitary gland, and adrenal gland
d) pituitary gland, thyroid gland, and adrenal gland
3. The hypothalamus produces thyrotropic releasing factor (TRF)
TRF stimulates the pituitary to produce thyroid stimulating hormone (TSH)
TSH stimulates the thyroid gland to produce thyroxin
An excess of thyroxine should result in feedback to the
a) pituitary, which increases the production of TSH
b) hypothalamus, which increases the production of TRF
c) thyroid, which decreases the production of thyroxin
d) hypothalamus, which decreases the production of TSH
4. Which of the following statements about hormones is accurate?
a) Hormones are produced by the central nervous system and stored in endocrine glands
b) Hormones are transported from endocrine glands by the circulatory system.
c) Hormones cause an instantaneous stimulating effect
d) Hormones stimulate only one target organ or group of cells
5. In response to low blood pressure, the kidney produces SUBSTANCE M, which in turn causes the adrenal cortex to produce SUBSTANCE N. The presence of SUBSTANCE N results in the reabsorption of SUBSTANCE Q and water into the blood. The reabsorption of water compensates for the low blood pressure. SUBSTANCE Q is most likely.
a) sodium ions
b) ADH
c) aldosterone
d) adrenalin
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