Quiz For Ninth Grade Students On Human Skeletal System

The human skeletal system does not have a direct role in controlling blood sugar levels. Blood sugar regulation is primarily controlled by the endocrine system, specifically the pancreas, which produces insulin to regulate glucose levels in the blood. The skeletal system is responsible for providing shape and support to the body, storing calcium and phosphorus, and protecting internal organs.

The joints of the hips and shoulders are classified as ball and socket joints. This type of joint allows for a wide range of motion in multiple directions, similar to how a ball can move in any direction within a socket. The rounded head of one bone fits into the cup-shaped socket of another bone, allowing for movements such as rotation, flexion, extension, abduction, and adduction. This type of joint provides stability and support while allowing for a greater range of motion compared to other joint types.

The correct answer is tibia and fibula. The tibia and fibula are the two bones that make up the lower leg. The tibia is the larger bone and is located on the inner side of the leg, while the fibula is the smaller bone and is located on the outer side of the leg. These two bones work together to provide support and stability to the lower leg, allowing for movement and weight-bearing activities.

A place where two or more bones meet is called a joint. Joints are crucial for allowing movement and flexibility in the body. They are responsible for connecting bones and providing support to the skeletal system. Joints can be classified into different types based on their structure and function, such as hinge joints, ball-and-socket joints, and pivot joints.

Ligaments are elastic fibers that connect the ends of bones at movable joints. They provide stability and support to the joints, allowing for movement while preventing excessive or abnormal motion. Tendons, on the other hand, connect muscles to bones and transmit the force generated by the muscles to the bones, enabling movement. Nervous tissue is responsible for transmitting signals throughout the body, while nephridia are excretory structures found in certain invertebrates. Therefore, the correct answer is ligaments.

A hinge joint is a type of joint that allows movement in only one direction. It works like a door hinge, allowing flexion and extension, but restricting other types of movement. This type of joint is commonly found in the knees and elbows, where it allows for bending and straightening of the limb. The other options listed - ball and socket, pivot, and gliding joints - allow for movement in multiple directions, making them incorrect choices for this question.

Blood cells are made in the bone marrow. The bone marrow is a soft, spongy tissue found inside the bones. It is responsible for the production of all types of blood cells, including red blood cells, white blood cells, and platelets. Red blood cells carry oxygen to the body's tissues, white blood cells help fight infection and disease, and platelets are involved in blood clotting. The bone marrow contains stem cells, which have the ability to differentiate into different types of blood cells, ensuring a continuous supply of new blood cells to maintain the body's functions.

Compact bone is the most solid form of bone because it is dense and tightly packed. It provides strength and support to the skeleton, protecting the internal organs and allowing for movement. Compact bone is made up of layers of mineralized bone tissue called lamellae, which are arranged in concentric circles around central canals. These canals contain blood vessels and nerves that supply nutrients and oxygen to the bone cells. The compact nature of this type of bone makes it highly resistant to bending and breaking, making it the most solid form of bone.

The surface of bones are covered by periosteum. The periosteum is a dense layer of connective tissue that surrounds the outer surface of bones. It contains blood vessels, nerves, and cells that are involved in bone growth, repair, and remodeling. The periosteum also serves as an attachment point for ligaments and tendons, providing stability and support to the bones.

Basic, bone-forming cells are called osteoblasts. Osteoblasts are responsible for the synthesis and mineralization of bone during the process of bone formation. They are derived from mesenchymal stem cells and play a crucial role in bone remodeling and repair. Osteoblasts secrete collagen and other proteins that form the organic matrix of bone, which is then mineralized with calcium and phosphate to form the hard, mineralized tissue.