Block 7 Male Repro MCQ's

14 Questions | By Chachelly | Last updated: Mar 21, 2022 | Total Attempts: 511

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The male sexual organs work together to produce and release semen into the reproductive system of the female during sexual intercourse In order for reproduction to take place. We covered much of this in week 11, take up the block 7 on male repro MCQ`s and jog your memory before the exam.

Questions and Answers

1.

A young male (8-years-old) comes to year office and presents with full development of male pubertal hair and growth of the penis. Which of the following explanations would account for his precocious puberty?
- A.
  
  Atrophy of GnRH producing cells of the pituitary gland
- B.
  
  Atrophy of LH producing cells of the anterior pituitary gland
- C.
  
  Hyperplasia of Sertoli cells
- D.
  
  Adenoma of GnRH producing cells of the hypothalamus
- E.
  
  Adenoma of FSH producing cells of the anterior pituitary gland
2.

A 55-year-old male was diagnosed with prostate cancer 5 years ago. He chose to undergo a radical prostatectomy which included removal of the prostate gland, seminal vesicles, Cowper's glands, and lymph nodes immediately adjacent to the prostate. He subsequently had an inability to achieve and/or maintain an erection whereas this was not the case prior to the prostatectomy. Choose the most likely explanation for this problem and why the drug Viagra helped correct his erectile dysfunction.
- A.
  
  Surgical damage to parasympathetic nerves to the penis; reduced breakdown of cGMP in vascular smooth muscle
- B.
  
  Surgical damage of sympathetic nerves to the penis; increased production of nitric oxide by endothelial cells
- C.
  
  Surgical damage to the parasympathetic nerves to the penis; increased production of nitric oxide by endothelial cells
- D.
  
  Damage to endothelial cells of the penis; blockade of nitric oxide synthase
- E.
  
  Damage to endothelial cell of the penis; blockade of inositol trisphosphate synthesis
3.

From the concept maps illustrated below, pick the correct representation for the feedback pathway for the male hypothalamic-pituitary-gonadal axis.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
4.

What cellular function or signaling parameter is found in BOTH Sertoli and Leydig cells?
- A.
  
  Gs-linked cAMP signal transduction
- B.
  
  LH and FSH receptors
- C.
  
  Synthesis of dihydrotestosterone
- D.
  
  Synthesis of estradiol
- E.
  
  Gq-linked phospholipase C signal transduction
5.

A predominantly male patient mentions that his childhood sexual development was a bit unusual because of 5a-reductase deficiency. What is the function of 5-alpha reductase?
- A.
  
  Makes testosterone in the testis
- B.
  
  Is needed for the synthesis of glucocorticoids and mineralocorticoids
- C.
  
  Turns testosterone into dihydrotestosterone
- D.
  
  Turns androgens into estrogens
- E.
  
  Catalyzes the conversion of cholesterol into pregnenolone
6.

Luteinizing hormone (LH) and follicle stimulating hormone (FSH) act through similar signal transduction pathways. However, each of these gonadotropins exert different effects in so far as upregulation of proteins in Leydig and Sertoli cells of the male testes. From the following table pick the row that correctly lists the receptor to LH or FSH on Leydig or Sertoli cells AND the action of LH or FSH with regard to upregulation of enzymes in Leydig or Sertoli cells.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
- E.
  
  E
7.

In the organ shown in the photomicrograph below, the major site of malignancy is
- A.
  
  The lactiferous duct
- B.
  
  The ductus epididymous
- C.
  
  The central zone
- D.
  
  The peripheral zone
- E.
  
  The endocervix
8.

A 1-year-old boy with undescended testes was given a hormonal treatment to correct the problem. Which of the following hormones was most likely administered to him?
- A.
  
  Follicle stimulating hormone
- B.
  
  Human chorionic gonadotropin
- C.
  
  Testosterone
- D.
  
  Leptin
- E.
  
  Cortisol
9.

Which of the following drugs can decrease the synthesis of dihydrotestosterone from testosterone?
- A.
  
  Bicalutamide
- B.
  
  Flutamide
- C.
  
  Finasteride
- D.
  
  Exemestane
- E.
  
  Spironolactone
10.

The function of the organ shown in the photomicrograph below is
- A.
  
  Passage of urine and sperm in male
- B.
  
  Passage of urine in female
- C.
  
  Passage of sperm from the epididymis to the urethra
- D.
  
  Passage of oocyte into uterus
- E.
  
  Passage of sperm from ductuli efferentes to ductus deferens
11.

Identify the organ below.
- A.
  
  Oviduct
- B.
  
  Ureter
- C.
  
  Ductus deferens
- D.
  
  Male urethra
- E.
  
  Seminal vesicle
12.

A male was seen by general practitioner because he had decreased facial hair and increased development of breast tissue which were interpreted as signs of gynecomastia. A history and physical exam revealed that he was obese (175% of normal weight for his height). Overproduction of what hormone was responsible for the gynecomastia?
- A.
  
  Testosterone
- B.
  
  Dihydrotesterone
- C.
  
  Estrogen
- D.
  
  Progesterone
- E.
  
  Luteinizing hormone
13.

Which of the following potential drug targets would provide the most appropriate treatment for a man with benign prostatic hyperplasia?
- A.
  
  Aromatase activity
- B.
  
  Adenylate cyclase activity
- C.
  
  Androgen receptors
- D.
  
  5a-reductase activity
- E.
  
  GnRH receptors
14.

For which of the following functions of the adult male is there a direct requirement for testosterone, dihydrotestosterone, AND estradiol?
- A.
  
  Beard growth
- B.
  
  Sperm production
- C.
  
  Epiphyseal plate closure
- D.
  
  Increased blood VLDL and LDL
- E.
  
  Seminal vesicle maintenance