Question

Excess calcitonin in the blood would most likely result in which of the following abnormalities?

A. Abnormally weak bones
B. Abnormally dense bones
C. A greater than normal number of osteoclasts
D. A decrease in the collagen content in bones

Answer 1

Excess calcitonin in the blood would most likely result in abnormally dense bones due to the inhibition of osteoclasts and stimulation of osteoblasts, leading to increased bone density.

Step-by-step explanation:

Excess calcitonin in the blood would lead to a decrease in blood calcium levels by inhibiting the activity of osteoclasts, which are the cells responsible for bone resorption. Meanwhile, it promotes the activity of osteoblasts, the cells that form bone. As a result, the most likely effect of an excess amount of calcitonin would be the formation of abnormally dense bones, not weaker bones, a greater number of osteoclasts, or a decrease in the collagen content in bones. This is because calcitonin works to deposit calcium into the bones, thus increasing bone density.