Male Reproductive System: Structure, Function, and Regulation

Question 1

Which hormone is the primary regulator of sperm production in the testes?

Accepted Answer

Testosterone

Answer

Estrogen

Answer

Progesterone

Answer

FSH (Follicle-Stimulating Hormone)

Question 2

Which hormone is crucial for preserving the active state of the seminiferous tubules, thus facilitating spermatogenesis?

Accepted Answer

Testosterone

Answer

Estrogen

Answer

FSH

Answer

LH

Question 3

Testosterone plays a crucial role in stimulating the production of which reproductive cells in males?

Accepted Answer

Spermatozoa

Answer

Ova

Answer

Oocytes

Answer

Embryos

Question 4

At which anatomical location within the male reproductive system does the first phase of meiosis (meiosis I) occur?

Accepted Answer

Seminiferous tubules

Answer

Epididymis

Answer

Vas deferens

Answer

Prostate gland

Question 5

Which of the following activities is not a primary function of the epididymis in the male reproductive system?

Accepted Answer

Production of testosterone

Answer

Maturation and storage of spermatozoa

Answer

Synthesis of seminal fluid

Answer

Facilitation of sperm transport

Question 6

Which accessory gland secretes seminal fluid, contributing to the composition of semen?

Accepted Answer

Seminal vesicles

Answer

Testes

Answer

Epididymis

Answer

Vas deferens

Question 7

Varicocele refers to a condition that affects which part of the male reproductive system, potentially leading to infertility?

Accepted Answer

Testes

Answer

Epididymis

Answer

Vas deferens

Answer

Prostate gland

Question 8

Which hormone is primarily responsible for the development and maintenance of male sexual characteristics, including muscle mass and facial hair?

Accepted Answer

Testosterone

Answer

Estrogen

Answer

Progesterone

Answer

Luteinizing hormone

Question 9

Which structure connects the epididymis to the vas deferens, allowing for the transport of spermatozoa?

Accepted Answer

Vas efferens

Answer

Seminiferous tubules

Answer

Ejaculatory duct

Answer

Urethra

Question 10

Erythrocytes, or red blood cells, are not a typical component of which bodily fluid?

Accepted Answer

Seminal fluid

Answer

Blood

Answer

Urine

Answer

Lymph

Question 11

Which accessory gland produces Cowper's fluid, which helps to neutralize acidic urine in the urethra during sexual arousal?

Accepted Answer

Bulbourethral gland

Answer

Prostate gland

Answer

Seminal vesicles

Answer

Vas deferens

Question 12

Excessive androgen levels primarily lead to which consequence in spermatogenesis?

Accepted Answer

Suppression of sperm production

Answer

Accelerated sperm development

Answer

Enhanced sperm count

Answer

Minimal impact on sperm production

Question 13

Which hormone initiates the process of sperm production in the testes?

Accepted Answer

Follicle-stimulating hormone (FSH)

Answer

Luteinizing hormone (LH)

Answer

Testosterone

Answer

Progesterone

Question 14

Where do sperm mature and gain the ability to fertilize an egg?

Accepted Answer

Epididymis

Answer

Seminiferous tubules

Answer

Vas deferens

Answer

Ejaculatory duct

Question 15

Which accessory gland produces the majority of the fluid in semen that nourishes and protects sperm?

Accepted Answer

Seminal vesicles

Answer

Prostate gland

Answer

Cowper's glands

Answer

Bulbourethral glands

Question 16

Which structure transports sperm from the testes to the urethra?

Accepted Answer

Vas deferens

Answer

Ejaculatory duct

Answer

Prostatic urethra

Answer

Seminal vesicles

Question 17

What type of cell gives rise to gametes (eggs and sperm)?

Accepted Answer

Germ cell

Answer

Somatic cell

Answer

Stem cell

Answer

Interstitial cell

Question 18

The production and initial maturation of spermatozoa occur primarily within which structure of the male reproductive tract?

Accepted Answer

Testes

Answer

Epididymis

Answer

Vas deferens

Answer

Seminal vesicles

Question 19

The function of the seminal vesicles does NOT include:

Accepted Answer

Storage of spermatozoa

Answer

Production of fructose and other nutrients for spermatozoa

Answer

Provision of alkaline secretions to buffer vaginal acidity

Answer

Formation of prostaglandins involved in female reproductive tract contractions

Question 20

Which of the following factors is unlikely to affect sperm motility?

Accepted Answer

Sperm count

Answer

Temperature

Answer

pH

Answer

Presence of toxins

Question 21

The descent of the testes into the scrotum during fetal development is primarily guided by:

Accepted Answer

Gubernaculum testis-mediated guidance

Answer

Active migration of the testes

Answer

Passive descent due to gravity

Answer

Hormonal stimulation

Question 22

Identify the primary site of spermatogenesis in adult males.

Accepted Answer

Seminiferous tubules

Answer

Epididymis

Answer

Prostate gland

Answer

Bulbourethral glands

Question 23

Specify the primary function of the prostate gland.

Accepted Answer

Secretion of seminal fluid

Answer

Storage of spermatozoa

Answer

Production of testosterone

Answer

Filtration of urine

Question 24

Which of the following is considered a part of the male external genitalia?

Accepted Answer

Penis

Answer

Testis

Answer

Epididymis

Answer

Vas deferens

Question 25

Specify the term used to describe the ejaculation of spermatozoa and seminal fluid.

Accepted Answer

Ejaculation

Answer

Emission

Answer

Detumescence

Answer

Orgasm

Question 26

Which of the following is not a function attributed to seminal fluid?

Accepted Answer

Induction of ovulation

Answer

Provision of nourishment for spermatozoa

Answer

Neutralization of vaginal acidity

Answer

Enhancement of sperm motility

Question 27

Where do primary spermatocytes in the seminiferous tubule undergo meiosis?

Accepted Answer

Adluminal compartment

Answer

Basal compartment

Answer

Myoid cells

Answer

Sertoli cells

Question 28

Which hormone triggers testosterone production in the testes?

Accepted Answer

Luteinizing hormone (LH)

Answer

Follicle-stimulating hormone (FSH)

Answer

Prolactin

Answer

Growth hormone

Question 29

Which hormone is responsible for the development and maintenance of male secondary sexual characteristics, such as facial hair and a deep voice?

Accepted Answer

Testosterone

Answer

Estrogen

Answer

Progesterone

Answer

Follicle-stimulating hormone (FSH)

Question 30

What hormone directly stimulates the production of testosterone?

Accepted Answer

Luteinizing hormone (LH)

Answer

Follicle-stimulating hormone (FSH)

Answer

Prolactin

Answer

Growth hormone

Question 31

In which organ does spermatogenesis occur?

Accepted Answer

Testis

Answer

Epididymis

Answer

Vas deferens

Answer

Prostate

Question 32

Which hormone is responsible for the development and maintenance of male secondary sexual characteristics, such as increased muscle mass, facial hair, and a deep voice?

Accepted Answer

Testosterone

Answer

Estrogen

Answer

Progesterone

Answer

FSH

Question 33

Which of the following is the primary function of the epididymis in the male reproductive system?

Accepted Answer

Provides a storage environment for sperm after production

Answer

Produces sperm

Answer

Facilitates the fertilization of eggs

Question 34

Which hormone specifically stimulates the interstitial cells of the testes to produce androgens?

Accepted Answer

Luteinizing hormone (LH)

Answer

Follicle-stimulating hormone (FSH) primarily stimulates spermatogenesis

Answer

Prolactin is involved in lactation

Answer

Growth hormone is not involved in male reproductive function

Question 35

What is the primary function of the epididymis?

Accepted Answer

Maturation and storage of sperm

Answer

Transport of sperm to the urethra is the function of the vas deferens

Answer

Secretion of seminal fluid is the function of the seminal vesicles and prostate gland

Answer

Production of sperm occurs in the seminiferous tubules

Question 36

Which of the following is NOT a known biological action of testosterone?

Accepted Answer

Maintenance of blood glucose levels

Answer

Spermatogenesis is stimulated by testosterone

Answer

Stimulation of protein synthesis is a major effect of testosterone

Answer

Development of male secondary sexual characteristics is influenced by testosterone

Question 37

Which neurotransmitter is primarily responsible for mediating penile erection?

Accepted Answer

Nitric oxide

Answer

Acetylcholine is involved in muscle contraction and parasympathetic nervous system function

Answer

Dopamine is involved in reward and motivation

Answer

Epinephrine is associated with the 'fight or flight' response

Question 38

What is the acceptable range of sperm count in a healthy adult male?

Accepted Answer

15-250 million sperm/mL

Answer

5-10 million sperm/mL would be considered very low and potentially indicative of infertility

Answer

250-500 million sperm/mL would be abnormally high

Answer

50-150 million sperm/mL would be below the normal range

Question 39

What is the primary molecular mechanism by which testosterone exerts its effects on target tissues?

Accepted Answer

Binding to androgen receptors

Answer

Stimulation of adenyl cyclase is not involved in the signaling pathway of testosterone

Answer

Activation of protein kinase A is not a primary mechanism of testosterone action

Answer

Inhibition of phosphodiesterase is not a mechanism of testosterone action

Question 40

Which hormone is primarily responsible for the development and maintenance of male secondary sexual characteristics, such as muscle mass, facial hair, and a deep voice?

Accepted Answer

Testosterone

Answer

Follicle-stimulating hormone (FSH)

Answer

Estrogen

Answer

Progesterone

Question 41

In which structure of the male reproductive system does spermatogenesis, the process of sperm cell production, primarily occur?

Accepted Answer

Seminiferous tubules

Answer

Vas deferens

Answer

Prostate gland

Answer

Epididymis

Question 42

Which of the following is a primary function of the epididymis?

Accepted Answer

Storage and maturation of sperm cells

Answer

Production of seminal fluid

Answer

Transport of sperm to the vas deferens

Answer

Neutralization of vaginal acidity

Question 43

What is the name of the erectile tissue in the penis that fills with blood during sexual arousal, causing an erection?

Accepted Answer

Corpus cavernosum

Answer

Prostate gland

Answer

Tunica albuginea

Answer

Glans penis

Question 44

Which gland is responsible for producing the majority of the seminal fluid, the fluid that nourishes and protects sperm cells?

Accepted Answer

Seminal vesicle

Answer

Prostate gland

Answer

Cowper's gland

Answer

Bulbourethral gland

Question 45

What is the term for the process by which sperm cells are expelled from the penis?

Accepted Answer

Ejaculation

Answer

Orgasm

Answer

Semination

Answer

Erection

Question 46

Which of the following conditions is a common cause of male infertility, often characterized by enlarged or dilated veins in the scrotum?

Accepted Answer

Varicocele

Answer

Cervical cancer

Answer

Endometriosis

Question 47

Which cells within the testes are responsible for producing testosterone?

Accepted Answer

Leydig cells

Answer

Myoid cells

Answer

Sertoli cells

Answer

Spermatogonia

Question 48

Where in the male reproductive system does spermatogenesis, the process of sperm cell development, take place?

Accepted Answer

Seminiferous tubules

Answer

Prostate gland

Answer

Vas deferens

Answer

Epididymis

Question 49

Which anterior pituitary hormone directly stimulates the Sertoli cells within the testes?

Accepted Answer

Follicle-stimulating hormone (FSH)

Answer

Testosterone

Answer

Gonadotropin-releasing hormone (GnRH)

Answer

Luteinizing hormone (LH)

Question 50

A patient presents with low sperm count and decreased fertility. Blood tests reveal normal testosterone levels but significantly lower FSH levels. Where is the most likely location of dysfunction in this patient?

Accepted Answer

Anterior pituitary gland

Answer

Testes

Answer

Hypothalamus

Question 51

Which of the following male reproductive structures contributes the largest volume of fluid to semen?

Accepted Answer

Seminal vesicles

Answer

Testes

Answer

Prostate gland

Answer

Bulbourethral glands

Question 52

What is the primary function of acrosomal hyaluronidase, an enzyme released by sperm cells during fertilization?

Accepted Answer

To digest the outer layers surrounding the ovum

Answer

To neutralize the acidic environment of the vagina

Answer

To stimulate ovulation

Answer

To provide energy for sperm motility

Question 53

Which physiological mechanism is primarily responsible for penile erection?

Accepted Answer

Parasympathetic nervous system activation and vasodilation

Answer

Hormonal stimulation by testosterone

Answer

Sympathetic nervous system activation and vasoconstriction

Question 54

A 60-year-old male presents with difficulty urinating, weak urine flow, and frequent urination. These symptoms are most consistent with which of the following conditions?

Accepted Answer

Benign prostatic hyperplasia

Answer

Epididymitis

Answer

Urethritis

Answer

Prostate cancer