20. Which of the following is not true of the pineal gland? a. It is...

20. Which of the following is not true of the pineal gland?

a.
It is located in the brain.
b.
It produces melatonin.
c.
It helps regulate the body’s “biological clock”.
d.
All of the above are true of the pineal gland.

21. Which of the following is not true of the pituitary gland?

a.
It is composed of two endocrine glands.
b.
Its posterior portion is called the adenohypophysis.
c.
It is located in the sella turcica of the sphenoid bone.
d.
All of the above are true of the pituitary gland.

22. Which of the following is not considered a tropic hormone?

a.
thyroid-stimulating hormone
b.
adrenocorticotropic hormone
c.
antidiuretic hormone
d.
follicle-stimulating hormone

23. Which of the following is not true of the adrenal medulla?

a.
It is the inner portion of the adrenal gland.
b.
It secretes epinephrine.
c.
It is the target organ for ACTH.
d.
All of the above are true of the adrenal medulla.

Expert Solution

20. D)All the above are true of the pineal gland

Pineal gland attached to the roof of third ventricle of the brain in the midline.It secreates melatonin.Melatonin appears to contribute to the setting of the body's biological clock, which is controlled by the suprachiasmatic nucleus of the hypothalamus. As more melatonin is liberated during darkness than in light ,this hormone is thought to promote sleepiness.

21.B)Its posterior portion is called the adenohypophysis.

The anterior pituitary gland is known as adenohypophysis. Posterior pituitary gland is called as neurohypophysis.

22.C)ANTIDIURETIC HORMONE

Hormones secreted from anterior pituitary and act on other endocrine glands are called tropic hormones. Antidiuretic hormone or vasopressin is secreted from posterior pituitary.

23.C) It is the target organ for ACTH

ACTH or Adrenocorticotrophic hormone which is released by anterior pituitary gland targets on adrenal cortex.It controls the secretion of glucocorticoids and Androgens.

Sydney Mullin answered 1 year ago

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