Which of the following is a normal age-related change for the female reproductive system?

Correct Answer: D

Rationale: The correct answer is D because as women age, the hormonal changes lead to a decrease in estrogen levels, resulting in the vaginal walls becoming drier and thinner. This is a normal age-related change known as vaginal atrophy. Lung capability increasing (A) and the amount of calcium in the body increasing (C) are not directly related to the female reproductive system. The response to vaccines decreasing (B) is more related to the immune system rather than the female reproductive system.

Correct Answer: B

Rationale: The correct answer is B: Lending support to body structures. Bones provide structural support for the body, protect vital organs, and allow for movement. They also serve as storage for minerals and production of blood cells. Protecting the body from disease (A) is mainly the function of the immune system. Sending messages throughout the human body (C) is the role of the nervous system. Pumping blood throughout the body (D) is the function of the heart and circulatory system.

Correct Answer: B

Rationale: Paraplegia is the loss of function of the lower body and legs. "Para" means alongside or beside, indicating the lower part of the body. The other choices, A: Concussion, C: Quadriplegia, and D: Hemiplegia, do not specifically refer to the loss of function in the lower body and legs. Concussion is a head injury, Quadriplegia affects all four limbs, and Hemiplegia affects one side of the body.

Correct Answer: A

Rationale: The correct answer is A because normal age-related changes in the endocrine system often involve a decrease in hormone levels, such as estrogen signaling menopause in women. This is a typical physiological process in aging females. Testosterone levels do not typically increase in males with age, making choice B incorrect. Insulin production may decrease or remain stable with age, but it does not typically increase, so choice C is incorrect. Lastly, the body's ability to handle stress usually decreases with age due to changes in hormone levels and other factors, making choice D incorrect.

Correct Answer: D

Rationale: The correct answer is D: 4. A quad cane has 4 feet for stability and support. Each foot touches the ground independently, providing balance and preventing falls. Choice A (1) is incorrect as a single foot would not provide adequate stability. Choice B (2) is incorrect as that would be a regular cane. Choice C (3) is incorrect as it would be a tri cane, not a quad cane.