how many autosomes does a human primary spermatocyte have

HESI RN

Reproductive System Exam Quizlet

1. How many autosomes does a human primary spermatocyte have?

A. 34
B. 44
C. 54
D. 33

Correct answer: B

Rationale: A human primary spermatocyte has 44 autosomes. Autosomes are chromosomes that are not involved in determining an individual's sex. In humans, there are a total of 46 chromosomes in a somatic cell, with 22 pairs of autosomes and one pair of sex chromosomes. Therefore, the correct answer is 44 autosomes, making choice B the correct answer. Choices A, C, and D are incorrect as they do not represent the accurate number of autosomes in a human primary spermatocyte.

2. The follicular phase is to the __________ as the luteal phase is to the secretory phase.

A. Postovulatory
B. Menstrual
C. Proliferative
D. Ovulatory

Correct answer: C

Rationale: The correct answer is C: Proliferative. The follicular phase corresponds to the proliferative phase during the menstrual cycle, characterized by the development of ovarian follicles. The luteal phase, on the other hand, corresponds to the secretory phase when the endometrium prepares for implantation. Choices A, B, and D are incorrect because they do not accurately reflect the phases being compared in the question.

3. What lines the uterus?

A. Endometrium.
B. Myometrium.
C. Perimetrium.
D. Glandular tissue.

Correct answer: A

Rationale: The correct answer is A, Endometrium. The endometrium is the inner lining of the uterus where the fertilized egg implants and develops during pregnancy. Myometrium (Choice B) is the middle layer of the uterus consisting of muscle tissue. Perimetrium (Choice C) is the outer layer of the uterus. Glandular tissue (Choice D) is a broad term referring to tissue containing glands, but it does not specifically line the uterus.

4. What type of epithelium lines the vagina?

A. Ciliated epithelium.
B. Squamous epithelium.
C. Columnar epithelium.
D. Transitional epithelium.

Correct answer: B

Rationale: The correct answer is B: Squamous epithelium. The vagina is lined with non-keratinized stratified squamous epithelium. This type of epithelium provides protection against abrasion and pathogens. Choice A, Ciliated epithelium, is incorrect as ciliated epithelium is found in areas like the fallopian tubes to help move the egg towards the uterus. Choice C, Columnar epithelium, is incorrect as columnar epithelium is typically found in areas like the intestines. Choice D, Transitional epithelium, is incorrect as this type of epithelium is found in areas like the urinary bladder.

5. Which one of the following is not a stage in the ovarian cycle of the menstrual cycle?

A. Recruitment of Graafian follicle
B. Selection of dominant follicle
C. Luteal phase
D. Formation of corpus luteum

Correct answer: A

Rationale: The correct answer is A. The recruitment of the Graafian follicle is indeed a stage in the ovarian cycle. During the ovarian cycle, the primary follicles are recruited to develop further, leading to the formation of the Graafian follicle. The selection of the dominant follicle, luteal phase, and formation of the corpus luteum are other essential stages in the ovarian cycle. Therefore, option A is not correct as it is a crucial phase in the process of ovulation and fertilization.