Which gland secretes melatonin and is regulated by the body's biological rhythm?
Adrenal gland
Pineal gland
Pituitary gland
Pancreas
The Correct Answer is B
A. Adrenal gland: Produces cortisol and adrenaline; not melatonin.
B. Pineal gland: Secretes melatonin; controls circadian rhythms.
C. Pituitary gland: Master gland; does not secrete melatonin.
D. Pancreas: Produces insulin and glucagon; unrelated to sleep regulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Norepinephrine: Norepinephrine is secreted by the adrenal medulla and plays a key role in the fight-or-flight response.
B. ACh: Acetylcholine (ACh) is a neurotransmitter but is not secreted by the adrenal glands.
C. ACTH: Adrenocorticotropic hormone is secreted by the pituitary, not the adrenal gland.
D. ADH: Antidiuretic hormone is secreted by the posterior pituitary and regulates water balance.
Correct Answer is A
Explanation
A. Uterus: The cervix is the lower, narrow part of the uterus that connects to the vagina.
B. Fallopian tube: The fallopian tubes connect the ovaries to the uterus, but do not include the cervix.
C. Vagina: The cervix connects the uterus to the vagina but is not part of the vagina itself.
D. Perineum: The perineum is the area between the vaginal opening and the anus, unrelated to the cervix.
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