The step in vitamin D activation accomplished by the ____________________ is subject to regulation by ____________________ and ____________________
Fill in the blank(s) with correct word
kidneys, PTH, plasma phosphate
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What is a hormone?
A. A chemical regulator secreted from an endocrine gland that travels through the bloodstream to affect target cells B. A chemical released from an endocrine gland that affects target cells without entering the bloodstream C. A chemical found in the blood that catalyzes the destruction of ingested toxins and foreign substances D. A chemical found in the sweat that signals other individuals about the physiological status of the body E. A chemical released from a nerve cell that affects nearby cells across a synapse
The somatic nervous system carries impulses from the brain and spinal cord to ________
A) Smooth muscles B) Skeletal muscles C) Cardiac muscle tissue D) All of the above
Answer the following statements true (T) or false (F)
1. The outer zone of the adrenal cortex secretes mineralocorticoids. 2. Cortisol is an example of a mineralocorticoid. 3. The adrenal medulla releases hormones that support and prolong the effects of the sympathetic nervous system. 4. Pancreatic alpha cells release glucagon. 5. Glucagon causes a reduction of the blood glucose concentration.
Which is TRUE about the maturation of ovarian follicles?
A. Growing follicles produce estrogen, which further stimulates follicle maturation. B. Theca cells produce estrogen, which is converted to the androgens that stimulate follicle maturation. C. Granulosa cells produce androgens, which stimulates follicle maturation. D. Follicle maturation is stimulated when FSH binds to theca cells and LH binds to granulosa cells. E. On day 1 of the cycle, growing follicles have both FSH and LH receptors on granulosa cells.