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. Which of the following is not a complication of menopause?

A. Fractures
B. Alzheimer's disease
C. Congestive heart failure
D. Painful intercourse

Correct answer: C

Rationale: Congestive heart failure is not typically associated with menopause. Menopause is linked to an increased risk of fractures due to bone density loss, a higher risk of Alzheimer's disease due to hormonal changes affecting the brain, and painful intercourse due to vaginal dryness and decreased lubrication. While cardiovascular health can be affected by menopause, congestive heart failure is not a direct complication of menopause.

3. Discuss the anatomical/physiological changes in pregnancy under the following: Cardiovascular system

A. The heart is displaced upward and to the left by the enlarging uterus, cardiac capacity increases, and blood pressure declines slightly.
B. The heart is displaced downward and to the right, and blood pressure increases.
C. The cardiovascular system remains unchanged during pregnancy.
D. Cardiovascular changes include increased peripheral resistance and reduced cardiac output.

Correct answer: A

Rationale: During pregnancy, the cardiovascular system undergoes changes such as the heart being displaced upward and to the left by the enlarging uterus, increased cardiac capacity, and a slight decline in blood pressure. Choice B is incorrect as the heart is displaced upwards, not downwards, and blood pressure typically decreases slightly. Choice C is incorrect as the cardiovascular system does undergo changes during pregnancy. Choice D is incorrect as cardiovascular changes in pregnancy involve increased cardiac output rather than reduced output.

4. Which of the following is not a barrier method of birth control?

A. Vaults
B. Diaphragms
C. Sterilization
D. Cervical caps

Correct answer: C

Rationale: The correct answer is C, Sterilization. Sterilization is a permanent form of birth control that involves surgical procedures to prevent pregnancy by blocking the fallopian tubes or vas deferens. Barrier methods physically prevent sperm from reaching the egg, such as vaults, diaphragms, and cervical caps. These devices create a barrier to sperm, unlike sterilization. Therefore, choices A, B, and D are all considered barrier methods of birth control.

5. What is one role of the hormone estrogen?

A. Stimulates the development of the milk-producing tissue.
B. Stimulates the production of lactoferrin.
C. Stimulates the development of the nipple and duct system in the breast.
D. Stimulates the secretion of relaxin.

Correct answer: A

Rationale: The correct answer is A: Estrogen stimulates the development of the milk-producing tissue in the breast. This hormone is essential in preparing the breast for milk production. Choice B is incorrect because lactoferrin production is not a primary role of estrogen. Choice C is incorrect as estrogen primarily influences the development of the breast tissue rather than specifically the nipple and duct system. Choice D is incorrect because relaxin secretion is not a function typically associated with estrogen.