Consider the following statements regarding the testicular temperature regulation and find the correct combination:
(I) The scrotum is a pocket-like structure that hangs outside the abdominal cavity. (II) Spermatogenesis requires a temperature that is about 2–2.5°C lower than the core body temperature. (III) The low temperature of the scrotum is maintained by its location outside the pelvis. (IV) In adults, each testis is circular in shape with a length of 4 to 5 cm.
Explanation: Statements (I), (II), and (III) are correct. The testes are situated outside the abdominal cavity in the scrotum, which maintains a temperature about 2–2.5°C lower than body temperature, essential for spermatogenesis. Statement (IV) is incorrect because each testis is oval, not circular, measuring about 4–5 cm in length and 2–3 cm in width.
Question 52 of 100
📘 CLASS XII
Read the statements below regarding the internal cellular environment of the seminiferous tubules:
(I) Sertoli cells provide nourishment to the developing male germ cells. (II) Male germ cells (spermatogonia) undergo meiotic divisions to form mature sperms. (III) Leydig cells are located inside the seminiferous tubules to stimulate spermatogonia. (IV) Immunologically competent cells are present in the interstitial spaces outside the tubules.
Explanation: Statements (I), (II), and (IV) are correct. Sertoli cells nourish developing germ cells, while spermatogonia undergo meiosis during spermatogenesis. Leydig cells and immunologically competent cells are located in the interstitial spaces outside the seminiferous tubules, making statement (III) incorrect.
Question 53 of 100
📘 CLASS XII
Select the correct combination of statements concerning the male sex accessory ducts:
(I) The correct sequence of sperm transport through accessory ducts is: Seminiferous tubules → Vasa efferentia → Rete testis → Epididymis → Vas deferens. (II) The seminiferous tubules open into the vasa efferentia through the rete testis. (III) The urethra originates from the urinary bladder and extends through the penis to the urethral meatus. (IV) Epididymis and vas deferens are responsible for both storing and transporting spermatozoa.
Explanation: Statement (I) is incorrect because the correct pathway is: Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens. Statements (II), (III), and (IV) are correct.
Question 54 of 100
📘 CLASS XII
Read the statements below regarding the anatomical pathway of the vas deferens and epididymis:
(I) The vasa efferentia leave the testis and open into the epididymis located on the anterior surface of each testis. (II) The epididymis leads to the vas deferens, which ascends into the abdominal cavity. (III) The vas deferens loops over the urinary bladder. (IV) The vas deferens receives a duct from the seminal vesicle and opens into the urethra as the ejaculatory duct.
Explanation: Statements (II), (III), and (IV) are correct. Statement (I) is incorrect because the epididymis is located along the posterior surface of each testis, not the anterior surface.
Question 55 of 100
📘 CLASS XII
Concerning the male external genitalia, evaluate the correctness of the following statements:
(I) The penis is composed of specialized erectile tissue that helps in its erection. (II) Erection of the penis is physiologically required to facilitate insemination. (III) The glans penis is the tapered, narrow starting portion of the penis. (IV) The glans penis is covered by a loose fold of skin called the foreskin.
Explanation: Statements (I), (II), and (IV) are correct. Statement (III) is incorrect because the glans penis is the enlarged terminal end of the penis, not the tapered starting portion.
Question 56 of 100
📘 CLASS XII
Read the statements below regarding the secretions of the male accessory glands:
(I) Seminal plasma is the collective secretion of the seminal vesicles, prostate, and bulbourethral glands. (II) Seminal plasma is rich in fructose, calcium, and certain enzymes. (III) Secretions of the bulbourethral glands are primarily involved in providing calcium to the sperms. (IV) Bulbourethral gland secretions help in the lubrication of the penis.
Explanation: Statements (I), (II), and (IV) are correct. Statement (III) is incorrect because the bulbourethral glands mainly secrete mucus that lubricates the penis and urethra, not calcium.
Question 57 of 100
📘 CLASS XII
Which of the following statements regarding the human ovaries are correct?
(I) The ovaries are the primary female sex organs. (II) They produce the female gamete (ovum) as well as several proteinaceous pituitary hormones. (III) Each ovary is about 2 to 4 cm in length. (IV) The ovaries are connected to the pelvic wall and uterus by ligaments.
Explanation: Statements (I), (III), and (IV) are correct. Statement (II) is incorrect because the ovaries produce steroid ovarian hormones, not proteinaceous pituitary hormones.
Question 58 of 100
📘 CLASS XII
Analyze the statements regarding the internal histology of the human ovary:
(I) Each ovary is covered by a thin epithelium. (II) The ovarian epithelium completely encloses the ovarian stroma. (III) The stroma is divided into a peripheral cortex and an inner medulla. (IV) Ovarian follicles in various stages of development are embedded within the medulla of the stroma.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because ovarian follicles are embedded in the peripheral cortex, not the medulla.
Question 59 of 100
📘 CLASS XII
Read the statements below regarding the structure of the fallopian tubes:
(I) Each fallopian tube is about 10–12 cm long. (II) The part of the fallopian tube closest to the ovary is the isthmus. (III) The funnel-shaped infundibulum has finger-like projections called fimbriae. (IV) Fimbriae help in the collection of the ovum after ovulation.
Explanation: Statements (I), (III), and (IV) are correct. Statement (II) is incorrect because the part of the fallopian tube closest to the ovary is the infundibulum, while the isthmus is the narrow terminal part that joins the uterus.
Question 60 of 100
📘 CLASS XII
Concerning the anatomical features of the human uterus, choose the correct statements:
(I) The uterus is a single, hollow organ also referred to as the womb. (II) The shape of the uterus resembles an inverted pear. (III) The uterus is supported by ligaments attached to the pelvic wall. (IV) The uterus opens into the vagina through a wide, muscular cervix.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the uterus opens into the vagina through a narrow cervix, whose cavity is called the cervical canal.
