Endocrine System: Question Preview (ID: 8906)

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Which of the following is least descriptive of the hypothalamus?
a) secretes releasing hormones
b) controls the secretion of the anterior pituitary gland
c) secretes ACTH, TSH, and gonadotropins
d) synthesizes oxytocin and ADH

Insulin and glucagon
a) are secreted by the beta cells of the islets of Langerhans.
b) elevate blood glucose.
c) are secreted in response to declining plasma levels of glucose.
d) are secreted by the pancreas and are concerned with the regulation of blood glucose.

a) are secreted by the adrenal medulla.
b) include the glucocorticoids, mineralocorticoids, and androgens.
c) stimulate the membranes of the target cells to produce the second chemical messenger, cAMP.
d) are secreted by the pancreas.

The adrenal medulla
a) is controlled primarily by ACTH.
b) secretes steroids.
c) is part of the “fight-or-flight” response.
d) secretes iodine-containing hormones.

Iodine-containing hormones
a) include thyroid-stimulating hormone (TSH).
b) are secreted by the hypothalamus as releasing hormones.
c) are steroids.
d) regulate metabolic rate.

Antidiuretic hormone (ADH) and oxytocin
a) are secreted by the neurohypophysis.
b) are mineralocorticoids.
c) are secreted by the islets of Langerhans.
d) stimulate the kidney to excrete Na+ and water.

Portal capillaries carry releasing hormones from the brain to the
a) neurohypophysis.
b) pancreas
c) anterior pituitary gland.
d) posterior pituitary gland.

Which of the following is the response to low plasma levels of calcium?
a) secretion of calcitonin
b) secretion of the beta cells of the islets of Langerhans
c) inhibition of the adenohypophyseal release of ACTH
d) secretion of PTH

What is the stimulus for the release of insulin?
a) low plasma levels of glucose
b) high plasma levels of potassium
c) high plasma levels of glucose
d) low blood volume

The adrenal cortex
a) is the target gland of ACTH.
b) secretes catecholamines.
c) is an extension of the sympathetic nervous system.
d) secretes ADH and oxytocin.

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