Question

what hormone promotes an increase in the activity of osteoclasts?

parathyroid hormone (pth)
estrogen
testosterone
calcitonin

question 34

the function of yellow bone marrow is:

triglyceride storage.
mineral storage.
hematopoiesis.
acid-base homeostasis.

Explanation:

Analyze the first question on osteoclast activity

The first question asks: "What hormone promotes an increase in the activity of osteoclasts?"

• Bone Cells (such as osteoclasts) are responsible for bone resorption, which releases calcium into the bloodstream.
• Parathyroid hormone (PTH) is secreted by the parathyroid glands in response to low blood calcium levels. It directly and indirectly stimulates osteoclast activity to break down bone matrix and release calcium.
• Estrogen and testosterone generally inhibit osteoclast activity and promote bone deposition.
• Calcitonin inhibits osteoclasts to lower blood calcium levels.

Therefore, parathyroid hormone (PTH) is the correct hormone.

Analyze the second question on yellow bone marrow

The second question (labeled Question 34) asks: "The function of yellow bone marrow is:"

• Skeletal Anatomy distinguishes between red bone marrow and yellow bone marrow.
• Red bone marrow is the site of hematopoiesis (blood cell production).
• Yellow bone marrow consists mainly of adipose tissue, which serves as a site for triglyceride (fat) storage.
• Mineral storage is primarily a function of the inorganic bone matrix (calcium and phosphorus).
• Acid-base homeostasis is regulated by buffer systems, respiration, and renal function, not marrow.

Therefore, triglyceride storage is the correct function.

Answer:

Question 1

• (A) parathyroid hormone (PTH) (Correct answer)
• (B) estrogen
• (C) testosterone
• (D) calcitonin

Question 34

• (A) triglyceride storage. (Correct answer)
• (B) mineral storage.
• (C) hematopoiesis.
• (D) acid-base homeostasis.