Function Of The Skeletal System Quiz

Explanation
Bones serve as a protective barrier for vital organs. They create a strong framework that shields delicate organs like the brain, heart, lungs, and liver from external forces and potential injuries. Without the support and protection of bones, these vital organs would be more susceptible to damage and harm. Therefore, it is true that bones surround vital organs to protect them.

Explanation
Bones store most of the calcium supply of the body because calcium is an essential mineral for bone health and strength. Calcium is constantly being deposited and withdrawn from the bones to maintain proper levels in the bloodstream, which is necessary for various bodily functions. When calcium intake is insufficient, the body will extract calcium from the bones to meet its needs, potentially leading to weakened bones and an increased risk of osteoporosis. Therefore, it is true that bones store a significant amount of the body's calcium supply.

Explanation
The given statement is false. The epiphysis is not the long shaft of the bone, but rather the rounded end of a long bone. The epiphysis contains the growth plate, which is responsible for bone growth during childhood and adolescence. The long shaft of the bone is called the diaphysis.

Explanation
Red marrow is not mainly composed of fat cells. Instead, red marrow is responsible for producing red blood cells, white blood cells, and platelets. It is a highly cellular tissue that is found in the spongy bone of certain bones in the body, such as the hip bones, ribs, and sternum. The red marrow contains hematopoietic stem cells, which are responsible for the production of blood cells. Therefore, the given statement is false.

Explanation
Yellow marrow is a type of bone marrow that is primarily composed of fat cells. While red marrow is responsible for producing blood cells, yellow marrow does not play a direct role in blood cell production. However, yellow marrow can be used to diagnose certain blood diseases as it contains important information about the overall health of the bone marrow. Additionally, in certain cases, yellow marrow can be transplanted to replace damaged or diseased bone marrow. Therefore, the statement is true.