Nokea
Which statement is true for the reproduction of reptiles and birds?
- A. Both newly hatched birds and reptiles require parental care
- B. They are both ovoviviparous.
- C. Both exhibit external fertilization.
- D. Both can reproduce asexually.
Correct Answer: B
Rationale: The correct answer is B: They are both ovoviviparous. Reptiles and birds are ovoviviparous, meaning they lay eggs that hatch internally and give birth to live young. Reptiles and birds do not require parental care immediately after birth, so choice A is incorrect. They reproduce through internal fertilization, making choice C incorrect. Reproduction through asexual means is not common in reptiles and birds, making choice D incorrect.
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Which of the following is NOT a part of
- A. labor a male's testis?
- B. menarche
- C. seminiferous tubule
- D. menstruation
Correct Answer: B
Rationale: The correct answer is B: menarche. Menarche refers to the onset of a female's first menstrual period, not related to male reproductive anatomy. Choice A, labor a male's testis, involves the process of childbirth and is not related to male reproductive anatomy. Choice C, seminiferous tubule, is a part of the male reproductive system where sperm is produced. Choice D, menstruation, is the monthly shedding of the uterine lining in females, not related to male reproductive anatomy. Therefore, menarche is the only choice that does not pertain to male reproductive anatomy.
A corpus luteum would be present ________.
- A. prior to ovulation in a female
- B. after ovulation in a female
- C. in the semen of a male
- D. only on the day of ovulation in a female
Correct Answer: B
Rationale: The correct answer is B, after ovulation in a female. After ovulation, the ruptured follicle transforms into a corpus luteum, which secretes progesterone to support the uterine lining. Prior to ovulation (choice A) there is a mature follicle, not a corpus luteum. Choice C is incorrect as the corpus luteum is a structure in the female reproductive system, not present in semen. Choice D is incorrect as the corpus luteum persists for about 14 days after ovulation, not just on the day of ovulation.
Which portion of the sperm houses the nucleus and its DNA?
- A. Midpiece
- B. Flagellum
- C. Head
- D. Tail
Correct Answer: C
Rationale: The correct answer is C: Head. The head of the sperm contains the nucleus, which houses the DNA. The nucleus carries the genetic information required for fertilization. The midpiece contains mitochondria for energy production, the flagellum provides motility, and the tail is a part of the flagellum. Therefore, the head is the only part of the sperm that houses the nucleus and DNA, making it the correct answer.
What structure attaches the ovaries and the uterus to the pelvic wall?
- A. Broad ligament
- B. Mesovarium
- C. Ovarian ligament
- D. Suspensory ligament
Correct Answer: D
Rationale: The correct answer is D: Suspensory ligament. The suspensory ligament attaches the ovaries to the pelvic wall and also contains the ovarian artery, vein, and nerves. This structure supports and suspends the ovaries in the pelvic cavity. The broad ligament (A) is a sheet of peritoneum that connects the uterus, fallopian tubes, and ovaries to the pelvic wall. The mesovarium (B) is a fold of peritoneum that attaches the ovaries to the broad ligament. The ovarian ligament (C) attaches the ovaries to the uterus. Therefore, the suspensory ligament is the correct answer as it specifically connects the ovaries to the pelvic wall.
The contraction of the myoepithelial breast cells is stimulated by _____.
- A. estrogen
- B. progesterone
- C. oxytocin
- D. prolactin
Correct Answer: C
Rationale: The correct answer is C: oxytocin. Myoepithelial cells contract to facilitate milk ejection during breastfeeding. Oxytocin is the hormone responsible for stimulating this contraction. Estrogen and progesterone are involved in breast development and preparing for lactation but do not directly stimulate myoepithelial cell contraction. Prolactin is responsible for milk production but does not directly trigger myoepithelial cell contraction.