HERLIHY ENDOCRINE SYSTEM CHAPTER 14
TEST BANK 2026 QUESTIONS AND ANSWERS
GRADED A+
◉ When cortisol is elevated Answer: negative feedback will cause
CRF and ACTH levels to be reduced
◉ Why is administering steroids a bad thing? Answer: they mimic
the effects of cortisol can cause negative feedback and will make the
adrenal glands atrophy
◉ Follicle Stimulating Hormone (FSH) Answer: Females: stimulates
growth/development of ovarian follicles; also stimulates the cells
lining the follicles to produce/secrete estrogen; used to superovulate
Males: stimulates spermatogenesis in the testes
◉ Luteinizing Hormone (LH) Answer: completes follicular
development in ovary; increased amounts of estrogen feedback to
the anterior pituitary and cause reduced production of FSH and
increased produced of LH; LH levels reach a peak when follicle is
fully mature (causes ovulation)
Males: LH stimulates interstitial cells to produce testosterone
, ◉ Antidiuretic Hormone (ADH) Answer: reduces urine volume,
prevents diuresis; receptors detect changes in concentration of
blood (due to dehydration-hemoconcentration); release of ADH
causes kidneys to reabsorb more water from urine and return it
back to bloodstream; urine becomes more concentrated; ADH
deficiency causes Diabetes Insipidus (PU/PD occurs)
◉ Oxytocin Answer: Positive feedback; effect on uterus: contraction
during breeding and parturition, helps to transport spermatozoa to
oviduct, causes delivery of fetus and placenta; Effect on mammary
glands: stimulation of teat/nipple by nursing or milking causes
oxytocin release into bloodstream
◉ Milk letdown Answer: causes contraction of myoepithelial cells
around mammary gland alveoli and small ducts. This forces milk
into lower parts of gland, making it acceptable
◉ Thyroid Gland Answer: two lobes on each side of larynx that
contain tens of thousands of follicles; each sphere of cuboidal
glandular cells surrounding colloid, which is thyroid hormone
precursor
◉ Thyroid hormones Answer: T3 and T4 (more iodine in T4 than
T3); produced when TSH from the anterior pituitary reaches thyroid
gland; T4 produced in greater abundance than T3 but is most
converted to T3;
TEST BANK 2026 QUESTIONS AND ANSWERS
GRADED A+
◉ When cortisol is elevated Answer: negative feedback will cause
CRF and ACTH levels to be reduced
◉ Why is administering steroids a bad thing? Answer: they mimic
the effects of cortisol can cause negative feedback and will make the
adrenal glands atrophy
◉ Follicle Stimulating Hormone (FSH) Answer: Females: stimulates
growth/development of ovarian follicles; also stimulates the cells
lining the follicles to produce/secrete estrogen; used to superovulate
Males: stimulates spermatogenesis in the testes
◉ Luteinizing Hormone (LH) Answer: completes follicular
development in ovary; increased amounts of estrogen feedback to
the anterior pituitary and cause reduced production of FSH and
increased produced of LH; LH levels reach a peak when follicle is
fully mature (causes ovulation)
Males: LH stimulates interstitial cells to produce testosterone
, ◉ Antidiuretic Hormone (ADH) Answer: reduces urine volume,
prevents diuresis; receptors detect changes in concentration of
blood (due to dehydration-hemoconcentration); release of ADH
causes kidneys to reabsorb more water from urine and return it
back to bloodstream; urine becomes more concentrated; ADH
deficiency causes Diabetes Insipidus (PU/PD occurs)
◉ Oxytocin Answer: Positive feedback; effect on uterus: contraction
during breeding and parturition, helps to transport spermatozoa to
oviduct, causes delivery of fetus and placenta; Effect on mammary
glands: stimulation of teat/nipple by nursing or milking causes
oxytocin release into bloodstream
◉ Milk letdown Answer: causes contraction of myoepithelial cells
around mammary gland alveoli and small ducts. This forces milk
into lower parts of gland, making it acceptable
◉ Thyroid Gland Answer: two lobes on each side of larynx that
contain tens of thousands of follicles; each sphere of cuboidal
glandular cells surrounding colloid, which is thyroid hormone
precursor
◉ Thyroid hormones Answer: T3 and T4 (more iodine in T4 than
T3); produced when TSH from the anterior pituitary reaches thyroid
gland; T4 produced in greater abundance than T3 but is most
converted to T3;
