the number of primordial follicles in the cortex of the ovary at birth is about
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HESI RN

Reproductive System Exam Quizlet

1. Approximately how many primordial follicles are present in the cortex of the ovary at birth?

Correct answer: A

Rationale: The correct answer is A: 250,000. At birth, there are approximately 250,000 primordial follicles in the cortex of each ovary. These primordial follicles represent the reserve of oocytes that a female will have throughout her reproductive life. Choice B, 200,000, is incorrect as the number is higher. Choices C and D, 150,000 and 100,000 respectively, are also incorrect as they underestimate the actual number of primordial follicles present at birth.

2. During a vaginal examination, which of the following statements is true?

Correct answer: C

Rationale: The correct answer is C. The cervix is best visualized with the Cusco's type of spectrum. This statement is true and important during a vaginal examination. Choice A is incorrect because cervical cytology scrapes can be taken during the same setting as a vaginal examination, not necessarily prior to it. Choice B is incorrect as it states 'after' bimanual examination, which is not the typical sequence. Choice D is incorrect because during pregnancy, the cervix feels soft rather than firm like the tip of the nose.

3. Which statement accurately describes the female pelvis?

Correct answer: B

Rationale: The correct answer is B because the Platypelloid pelvis indeed has an oval inlet. Gynaecoid pelvis, not mentioned in the choices, has a round inlet. Anthropoid pelvis has a long, narrow oval inlet, which makes choice C incorrect. Choice D is incorrect as the Android pelvis is actually heart-shaped with a narrowed inlet.

4. How does human sperm move?

Correct answer: A

Rationale: Human sperm moves using flagella, which are whip-like structures that aid in propulsion. Flagella are tail-like structures found in sperm cells and help them swim towards the egg for fertilization. Cilia are shorter, hair-like structures that are not involved in the movement of sperm. Neutrophils are a type of white blood cell involved in the immune response and are not related to sperm locomotion.

5. The endometrium is shed up to the basal layer during this phase of the menstrual cycle:

Correct answer: D

Rationale: The correct answer is D. During the menstrual phase of the menstrual cycle, the endometrium is shed up to the basal layer. This shedding occurs as a result of decreased levels of estrogen and progesterone, leading to the breakdown and subsequent shedding of the endometrial lining. Choice A, ovulation, is incorrect as ovulation is the release of an egg from the ovary, which occurs during the mid-cycle. Choice B, regenerative, is incorrect as it does not specifically refer to the phase where the shedding of the endometrium occurs. Choice C, secretory, is incorrect as it refers to the phase where the endometrium thickens in preparation for possible implantation of a fertilized egg, not shedding.

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