Güler Flashcards
Which of the followings is not secreted by granulosa cells of a mature follicle in an adult woman?
a) Inhibin
b) Estrogen
c) Activin
d) Androgens
e) Progesterone
d) Androgens
In which of the following chemical messenger systems, secretion products reach extracellular fluid and affect neighboring target cells?
a) Neuroendocrine
b) Neural
c) Endocrine
d) Autocrine
e) Paracrine
e) Paracrine
Which of the following hormones doesn’t play a role in spermatogenesis?
a) Progesterone
b) Testosterone
c) Prolactin
d) Growth hormone (GH)
e) Estrogen
a) Progesterone
Which of the followings describes the Wolff-Chaikoff effect?
a) High levels of iodide inhibit organification and synthesis of thyroid hormones
b) Thyroxine (T4) blood concentration is greater than triiodothyronine (T3)
c) Thyrotropin-releasing hormone (TRH) stimulates the secretion of thyroid stimulating hormone (TSH)
d) Thyroid stimulating hormone (TSH) regulates the growth of the thyroid gland
e) Most of the thyroxine (T4) is converted to triiodothyronine (T3) in tissues
a) High levels of iodide inhibit organification and synthesis of thyroid hormones
Which of the followings is the main source of progesterone secretion during the luteal phase of a menstrual cycle?
a) Corpus luteum
b) Inhibin
c) Dominant follicle
d) Follicle stimulating hormone (FSH)
e) Luteinizing hormone (LH)
a) Corpus luteum
Which of the followings is not expected in hypothyroidism?
a) Constipation
b) Hot intolerance
c) Weight gain
d) Myxedema
e) Goiter
b) Hot intolerance
Which of the followings is mediated by dihydrotestosterone (DHT) in an adult man body?
a) Initiation and maintaining of spermatogenesis
b) Deepening of voice
c) Increased erythropoietin secretion
d) Male pattern baldness
e) Increased protein synthesis and muscle mass
d) Male pattern baldness
Which of the following is not an expected effect of cortisol?
a) Increasing protein catabolism in non-hepatic tissues
b) Increasing the utilization of fatty acids for energy
c) Increasing fat catabolism in adipose tissues
d) Increasing the utilization of amino acids for energy
e) Decreasing protein synthesis in liver
e) Decreasing protein synthesis in liver
Which of the followings prevents the involution of corpus luteum?
a) Estrogen
b) Follicle stimulating hormone (FSH)
C) Human chorionic gonadotropin (hCG)
d) Inhibin
e) Progesterone
C) Human chorionic gonadotropin (hCG)
Which of the following hormones doesn’t play a role in the ductal system development of breasts in the lactation period?
a) Growth hormone
b) Insulin
c) Estrogen
d) Cortisol
e) Progesterone
e) Progesterone
Which of the following hormones decreases uterine contractions during parturition?
a) Oxytocin
b) Cortisol
c) Prostaglandins
d) Progesterone
e) Estrogens
d) Progesterone
Which of the following hormones’ receptor is in the cell nucleus?
a) Cortisol
b) Aldosterone
c) Triiodothyronine (T3)
d) Dopamine
e) Epinephrine
b) Aldosterone
Which of the followings doesn’t play a role in producing active vitamin D in the kidneys?
a) O Decreased calcium (Ca) levels
b) O Decreased phosphate (P) levels
c) Decreased potassium (K) levels
d) Increased parathyroid hormone (PTH) levels
e) Increased prolactin levels
c) Decreased potassium (K) levels
Which of the followings is not expected when the parathyroid hormone (PTH) levels are increased in the plasma?
a) PTH indirectly stimulates intestinal Ca and P reabsorption via activation of vitamin D
b) PTH stimulates phosphate (P) reabsorption in kidneys
C) PTH stimulates calcium (Ca) reabsorption in kidneys
d) PTH promotes bone resorption
e) PTH stimulates the activity of 1a-hydroxylase enzyme in kidneys and plays a role in active Vit D production
b) PTH stimulates phosphate (P) reabsorption in kidneys
- Which of the following statements is not an expected effect of estrogens in the body?
a) Stimulating fat deposition on hips and breasts
b) Increasing metabolic rate slightly
c) Stimulating breast development
d) Inhibiting osteoclastic activity
e) Decreasing water retention by kidneys
e) Decreasing water retention by kidneys
Which of the followings is not an example of the hypophysiotropic hormones?
a) Antidiuretic hormone (ADH)
b) Growth hormone-releasing hormone (GHRH)
c) Thyrotropin-releasing hormone (TRH)
d) Somatostatin
e) Corticotropin-releasing hormone (CRH)
a) Antidiuretic hormone (ADH)
Which of the following hormones is secreted in response to Angiotensin II?
a) Aldosterone
b) FSH
c) Estrogen
d) Thyroxin
e) Cortisol
a) Aldosterone
Which of the following statements inhibits growth hormone secretion?
a) Exercising
b) Testosterone
c) Obesity
d) Trauma
e) Starvation
c) Obesity
Which of the following is not an expected effect of cortisol?
A) Stimulates gluconeogenesis
B) Increases glucose utilization for energy
C) Increases fatty acid utilization for energy
D) Increases amino acid utilization for energy
E) Increases insulin resistance
B) Increases glucose utilization for energy
What is the source of high estrogen levels before the luteinizing hormone (LH) surge in follicular phase of menstrual cycle?
A) Dominant follicle
B) Corpus luteum
C) FSH
D) GnRH
E) LH
A) Dominant follicle
Prolactin is produced by which of the following cells?
A) Somatotropes
B) Mammotropes
C) Corticotropes
D) Neurons of the paraventricular nucleus in the hypothalamus
E) Thyrotropes
B) Mammotropes
Which of the followings stimulates the Leydig cells to synthesize testosterone?
a) Inhibin
b) Luteinizing hormone (LH)
C) Aromatase
d) Estradiol
e) Follicle stimulating hormone (FSH)
b) Luteinizing hormone (LH)
Which of the followings is not produced by placenta?
a) Human chorionic gonadotropin (hCG)
b) Follicle stimulating hormone (FSH)
c) Progesterone
d) Relaxin
e) Estrogen
b) Follicle stimulating hormone (FSH)
Which of the following hormones stimulates the contraction of uterus smooth muscles and forces excretion of milk from alveoli into ducts?
a) Corticotropin-releasing hormone (CRH)
b) Oxytocin
C) Thyrotropin-releasing hormone (TRH)
d) Dopamine
e) Somatostatin
b) Oxytocin
Which of the followings is not an example of amine hormones?
a) Serotonin
b) Norepinephrine
c) Epinephrine
d) Dopamine
e) Cortisol
e) Cortisol
