Skeletal & Muscular System Quiz: Body Mechanics

The correct answer is 206. This is the number of bones in the human body. The human skeleton is made up of 206 bones, which provide structure, support, and protection for the body. These bones are connected by joints, allowing for movement and flexibility.

The humerus is indeed located in the arm. It is the long bone that extends from the shoulder to the elbow and is the largest bone in the upper limb. It connects the scapula (shoulder blade) to the radius and ulna (forearm bones). The humerus plays a crucial role in the movement and stability of the arm, allowing for various actions such as flexion, extension, and rotation.

The statement is incorrect. The bicep is actually a muscle located in the upper arm, not the lower leg. Therefore, the correct answer is False.

Ligaments are strong bands of connective tissue that connect bones to other bones in the body. They provide stability and support to the joints by keeping the bones in proper alignment and limiting excessive movement. Ligaments are flexible but not as stretchy as tendons, which connect muscles to bones. Therefore, the statement "Ligaments connect one bone to another" is correct.

Bones serve as a protective framework for the body's internal organs. They form a solid structure that shields delicate organs such as the heart, lungs, and brain from external forces and potential injuries. Without bones, these vital organs would be vulnerable to damage and would lack the necessary support and protection needed for their proper functioning.

Cartilage is a connective tissue that acts as a cushion between bones, preventing them from rubbing against each other. It provides a smooth surface for joint movement and absorbs shock, reducing friction and protecting the bones from damage. Unlike muscle and tendon, which are involved in movement and connecting muscles to bones respectively, cartilage specifically serves the purpose of preventing bone-on-bone contact. Therefore, cartilage is the correct answer to the question.

Skeletal muscle is responsible for voluntary movement and support of the skeleton, so it cannot form the bulk of the wall of the heart. The correct answer is "None of the above."

Cartilage is not a stiff structure. It is a flexible connective tissue that is found in various parts of the body, such as the ears, nose, and joints. Unlike bone, which is hard and rigid, cartilage provides support and cushioning while allowing for movement. Therefore, the given statement is false.

Smooth muscle is the correct answer because it is the muscle type that is found in the walls of blood vessels. Smooth muscle is involuntary and non-striated, allowing it to contract and relax to regulate blood flow and maintain blood pressure. Cardiac muscle is found in the heart, while skeletal muscle is attached to bones and responsible for voluntary movements. Therefore, neither cardiac nor skeletal muscle is located in blood vessels.

Tendons are the structure that transfers the force of a muscle contraction to the bone. Tendons are strong, fibrous connective tissues that attach muscles to bones, allowing the muscles to exert force and move the bones. They play a crucial role in transmitting the force generated by the muscles to the bones, enabling movement and providing stability to the skeletal system.