Nokea
Gas exchange in utero in the fetus is performed by the
- A. fetal heart
- B. fetal lungs
- C. placenta
Correct Answer: C
Rationale: The placenta facilitates gas exchange between the mother and fetus, supplying oxygen and removing carbon dioxide.
You may also like to solve these questions
The olfactory nerves go through the ______ to enter the cranial cavity:
- A. Foramen ovale
- B. Cribriform plate
- C. Foramen spinosum
- D. Superior orbital fissure
Correct Answer: B
Rationale: The correct answer is B: Cribriform plate. The olfactory nerves pass through the cribriform plate, which is a part of the ethmoid bone located in the anterior cranial fossa. This structure contains numerous small perforations that allow the olfactory nerve fibers to pass through and enter the cranial cavity, specifically the olfactory bulb. The other choices, A, C, and D, are incorrect because the foramen ovale is located in the sphenoid bone and transmits the mandibular nerve, the foramen spinosum transmits the middle meningeal artery, and the superior orbital fissure transmits structures like the oculomotor nerve, trochlear nerve, and ophthalmic nerve, but not the olfactory nerves.
Reddish-orange crystals noted in the urine of a 48-hour-old newborn are
- A. a sign of congenital renal disease
- B. a sign of vitamin K deficiency
- C. a normal finding
Correct Answer: C
Rationale: Uric acid crystals are commonly seen in newborn urine and are considered normal.
A woman who has taken methadone during pregnancy and wants to breastfeed should
- A. take the lowest dose of methadone
- B. continue the same dose of methadone
- C. stop taking methadone
Correct Answer: B
Rationale: Continuing methadone at the same dose is safe for breastfeeding mothers and their infants.
Which hormonal effect is noted during the menstrual cycle?
- A. Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secretion rise
- C. A negative feedback mechanism is exhibited by the anterior pituitary gland and ovaries.
- D. The posterior pituitary gland secretes LH.
Correct Answer: A
Rationale: The correct answer is A because during the menstrual cycle, LH and FSH secretion rise to stimulate ovarian follicle development and trigger ovulation. This process is crucial for maintaining the menstrual cycle. Choice B is incorrect as it is incomplete. Choice C is incorrect as negative feedback is primarily between the hypothalamus, pituitary gland, and ovaries, not just the anterior pituitary gland and ovaries. Choice D is incorrect because LH is primarily secreted by the anterior pituitary gland, not the posterior pituitary gland.
The follicular phase of the menstrual cycle is the same as the:
- A. Ovulatory phase
- B. Menstrual period
- C. Postmenstrual phase
- D. Postovulatory phase
Correct Answer: C
Rationale: The follicular phase is also known as the postmenstrual phase.