Which of the following is not a contribution of the reproductive system to the body systems?

Correct Answer: C

Rationale: The correct answer is C: Increasing the rate and depth of breathing during sexual arousal. The reproductive system does not directly contribute to the rate and depth of breathing. The main function of the reproductive system is to produce and deliver gametes for reproduction. It does not have a direct role in regulating respiratory functions. Choices A, B, and D are incorrect because the reproductive system does contribute to maintaining bone health, regulating cholesterol levels in males, and stimulating muscle growth in males. These functions are known contributions of the reproductive system to the body systems.

Correct Answer: C

Rationale: The correct answer is C: Vasovasostomy. This procedure involves reconnecting the vas deferens to reverse a vasectomy, allowing sperm to be present in the ejaculate again. Orchiopexy (A) is the surgical fixation of a testicle in the scrotum and is not related to reversing sterilization. Vasectomy (B) is the sterilization procedure itself, not the reversal. Bilateral orchiectomy (D) is the surgical removal of both testicles and is a permanent sterilization method, not a reversal procedure. Therefore, the correct choice is C as it directly addresses the reversal of male sterilization.

Correct Answer: B

Rationale: The correct answer is B: Flagella. Flagella are whip-like structures that provide motility to sperm cells. They enable the sperm cell to move towards the egg for fertilization. Cilia (choice A) are shorter hair-like structures involved in movement but are not found on sperm cells. Pseudopodia (choice C) are temporary projections used for cell movement in some organisms, not sperm cells. Dendritic processes (choice D) refer to branching extensions of nerve cells, not involved in sperm motility. Therefore, flagella is the most appropriate choice for the hair-like process on the sperm cell that makes it motile.

Correct Answer: D

Rationale: The correct answer is D: Scapula. The scapula is commonly known as the shoulder blade and is the bone that connects the upper arm bone (humerus) to the collarbone (clavicle) to form the shoulder joint. The other choices, A: Clavicle, is the collarbone; B: Sternum, is the breastbone; and C: Humerus, is the upper arm bone, are not specifically referred to as the shoulder bone. Therefore, the scapula is the correct answer as it is directly associated with the shoulder joint.

Correct Answer: B

Rationale: The correct answer is B: Sternum. The sternum is commonly referred to as the breastbone because it is a flat bone located in the center of the chest. It connects to the rib cage and helps protect vital organs such as the heart and lungs. The xiphoid process (choice A) is the lower part of the sternum, the clavicle (choice C) is the collarbone, and the coracoid process (choice D) is a projection on the scapula. Therefore, the sternum is the most appropriate term for the breastbone.