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BIO 224 EXAM 1 (2026/2027) QUESTIONS WITH
CORRECT ANSWERS | BRAND NEW GRADED A+
Where in the male reproductive system would you expect to find the most mature spermatozoa? A) in the seminiferous tubules B) in the head of the epididymis C) in the ductus deferens and ejaculatory duct D) in the seminal gland E) in the prostate gland C) in the ductus deferens and ejaculatory duct If the prostate stopped secreting fluid, this would result in semen A) that lacked sperm. B) with a higher than normal pH. C) with less fructose. D) with no mucus. E) that was rich in prostaglandins. B) with a higher than normal pH. Scarring of the rete testis would interfere with a man's ability to
A) secrete testosterone. B) regulate spermatogenesis. C) ejaculate. D) produce an alkaline semen. E) deliver spermatozoa to the epididymis. E) deliver spermatozoa to the epididymis. Contraction of the cremaster muscles A) tenses the scrotal sac. B) pulls the testes closer to the body cavity. C) propels sperm through the urethra. D) moves sperm through the ductus deferens. E) tenses the scrotal sac and pulls the testes closer to the body cavity. E) tenses the scrotal sac and pulls the testes closer to the body cavity. Contraction of the dartos muscle A) tightens the scrotal sac. B) produces an erection. C) propels sperm through the urethra. D) moves sperm through the ductus deferens.
A male bodybuilder starts taking injections of testosterone (an anabolic steroid) on a daily basis. After 3 weeks, which of the following would you expect to observe? A) increased sex drive B) decreased levels of GnRH C) decreased levels of LH and FSH D) increased muscle mass E) All of the answers are correct. E) All of the answers are correct. Which of the following descriptions best matches the term endometrium? A) thick layer of smooth muscle cells B) supports the uterus anteriorly C) supports the uterus laterally D) consists of a functional zone and a basilar zone E) after ovulation, the ovum is captured by it D) consists of a functional zone and a basilar zone The broad ligament is A) an extensive mesentery that encloses the ovaries, uterine tubes, and uterus. B) a thickened fold of mesentery that supports and stabilizes the position of the ovary.
C) a pocket formed between the posterior wall of the uterus and the anterior surface of the rectum. D) a structure that anchors the ovary to the rectouterine pouch. E) a structure that extends from the lateral surface of the ovary to the pelvic wall. A) an extensive mesentery that encloses the ovaries, uterine tubes, and uterus. The organ that transports the ovum to the uterus is the A) uterosacral ligament. B) vagina. C) uterine tube. D) infundibulum. E) myometrium. C) uterine tube. The organ that provides mechanical protection and nutritional support for the developing embryo is the A) vagina. B) uterine tube. C) ovary. D) uterus. E) cervix. D) uterus.
C) thousands D) 46 E) 4 A) 23 Interstitial cells A) are also called Leydig cells. B) respond to luteinizing hormone. C) produce testosterone. D) are located between seminiferous tubules. E) All of the answers are correct. E) All of the answers are correct. Testicular nurse cells function in all of the following ways, except that they don't A) secrete Müllerian inhibiting factor. B) secrete progesterone-binding protein. C) coordinate spermiogenesis. D) support meiosis. E) serve as a blood-testis barrier. B) secrete progesterone-binding protein.
The ductus deferens is approximately ________ cm long. A) 15- 20 B) 50- 60 C) 40- 45 D) 3 1 - 35 E) 12 C) 40- 45 In a mature human spermatozoan, A) the acrosome is next to the flagellum. B) the midpiece contains the chromosomes. C) the tail contains the mitochondria. D) the head contains 23 chromosomes. E) the head is diploid. D) the head contains 23 chromosomes. A typical ejaculation releases approximately ________ sperm. A) 1 million B) 250 million C) 100,
A) base of the uterus and vagina to the lateral walls of the pelvis. B) lateral surface of the uterus to the anterior surface of the sacrum. C) lateral margins of the uterus, through the inguinal canal to the external genitalia. D) body of the uterus to the fundus. E) cervix of the uterus to the vagina. C) lateral margins of the uterus, through the inguinal canal to the external genitalia. The inferior portion of the uterus that projects into the vagina is the A) isthmus. B) fornix. C) fundus. D) body. E) cervix. Answer: E) cervix. The thick muscular layer of the uterus is the A) endometrium. B) perimetrium. C) myometrium.
D) uterometrium. E) sarcometrium. C) myometrium. Each of the following statements concerning oogenesis is true, except that A) oogenesis begins before birth. B) ova develop from stem cells called oogonia. C) an ovum completes its last meiosis after it is fertilized. D) about half the oogonia complete mitosis between birth and puberty. E) by the time of their birth, girls have already lost about 80 percent of their oocytes. D) about half the oogonia complete mitosis between birth and puberty. The surge in luteinizing hormone that occurs during the middle of the ovarian cycle triggers A) follicle maturation. B) menstruation. C) ovulation. D) menopause. E) atresia. C) ovulation.
C) the fertilized ovum implants. D) the old functional layer is sloughed off. E) the endometrium finalizes the preparation for implantation. B) the functional zone of the endometrium is restored. During the secretory phase of the menstrual cycle A) the fertilized ovum implants. B) progesterone levels are high. C) endometrial glands enlarge. D) the corpus luteum is formed. E) All of the answers are correct. E) All of the answers are correct. During the menses A) progesterone levels are high. B) a new uterine lining is formed. C) secretory glands and blood vessels develop in the endometrium. D) the old functional layer is sloughed off. E) the corpus luteum is most active. D) the old functional layer is sloughed off.
All of the following are true of the vagina, except that it A) serves as a passageway for the elimination of menstrual fluids. B) receives the penis during coitus. C) holds spermatozoa prior to their passage to the uterus. D) forms the lower portion of the birth canal. E) loses a portion of its lining during menses. E) loses a portion of its lining during menses. The vagina is A) lined by simple columnar epithelium rich in goblet cells. B) similar to the inner lining of the uterus. C) another term for the cervix. D) a muscular tube extending between the uterus and the external genitalia. E) a muscular tube extending between the uterus and the anus. D) a muscular tube extending between the uterus and the external genitalia. The vulva includes all of the following, except the A) mons pubis. B) vagina.
Fatty folds of skin that encircle and partially conceal the labia minora and vestibule are the A) fornices. B) ampullae. C) labia majora. D) mons pubis. E) vestibular arches. C) labia majora. The clitoris A) is derived from the same embryonic structures as the penis in males. B) engorges with blood during sexual arousal. C) is topped by a small erectile glans. D) contains erectile tissue comparable to the corpora cavernosa of the penis. E) All of the answers are correct. E) All of the answers are correct. The pigmented skin that surrounds the nipple is the A) zona reticularis. B) fornix.
C) zona pellucida. D) peripapilla. E) areola. E) areola. The principal hormone secreted by the corpus luteum is A) LH. B) FSH. C) progesterone. D) luteosterone. E) estrogen. C) progesterone. Menstruation is triggered by a drop in the levels of A) FSH. B) LH. C) relaxin. D) progesterone. E) inhibin. D) progesterone.
B) cervix C) myometrium D) fundus E) internal os B) cervix The ________ is the region of the vagina that surrounds the cervix. A) rugae B) fornix C) dartos D) fundus E) external os B) fornix Which region of the uterine tube captures the ovum? A) ampulla B) anterior segment C) infundibulum D) posterior segment E) isthmus C) infundibulum
The ________ is the rounded portion of the uterine body superior to the attachment of the uterine tubes. A) body B) cervix C) myometrium D) fundus E) internal os D) fundus The region where blood vessels enter the ovary is called the A) infundibulopelvic ligament. B) tunica albuginea. C) ovarian umbilical cord. D) ovarian hilum. E) ovarian ligament. D) ovarian hilum. The portion of the uterine tube that ends in fingerlike fimbriae is the A) ampulla.
