Skeletal System — Set 1
Biology · कंकाल तंत्र · Questions 1–10 of 50
Which of the following bones is also known as the 'Collar Bone' in the human body?
Correct Answer: D. Clavicle
The clavicle is a long bone that serves as a strut between the shoulder blade and the breastbone. It is the only long bone in the body that lies horizontally. It is one of the most commonly fractured bones in the human body.
What is the total number of bones in the axial skeleton of an adult human?
Correct Answer: A. 80
The axial skeleton consists of 80 bones along the central axis of the human body. This includes the skull, vertebral column, ribs, and sternum. It protects the vital organs such as the brain, heart, and lungs.
The joint between the atlas and axis vertebrae is an example of which type of joint?
Correct Answer: B. Pivot joint
A pivot joint allows for rotational movement around a single axis. The atlas and axis joint enables the head to turn from side to side. These joints are a specific type of synovial joint.
Which substance provides strength and hardness to the human bones?
Correct Answer: A. Calcium and Phosphorus
Bones are composed of a collagen matrix reinforced with calcium phosphate minerals. This combination provides both flexibility and high compressive strength. Approximately 99% of the body's calcium is stored in the skeletal system.
What is the study of bones called?
Correct Answer: D. Osteology
Osteology is a branch of anatomy that focuses on the detailed study of bone structures. It involves examining bone formation, diseases, and the overall skeletal system. This field is essential for forensic science and physical anthropology.
Which part of the bone is responsible for the production of red blood cells?
Correct Answer: B. Red Bone Marrow
Red bone marrow is found mainly in the flat bones and the ends of long bones. It contains hematopoietic stem cells that produce blood cells through a process called hematopoiesis. In adults, yellow marrow replaces red marrow in many central cavities.
The 'Shin Bone' is the common name for which of the following bones?
Correct Answer: A. Tibia
The tibia is the larger and stronger of the two bones in the lower leg. It connects the knee with the ankle bones and bears most of the body's weight. It is located on the medial side of the leg.
How many pairs of 'floating ribs' are there in the human rib cage?
Correct Answer: C. 2 pairs
Floating ribs are the last two pairs (11th and 12th) of ribs in the human body. They are called so because they do not attach to the sternum or to other ribs. They primarily protect the kidneys located behind them.
The process of bone formation is scientifically known as?
Correct Answer: A. Ossification
Ossification is the process by which new bone tissue is created by cells called osteoblasts. It begins during fetal development and continues until early adulthood. There are two main types: intramembranous and endochondral ossification.
Which bone is the only movable bone in the human skull?
Correct Answer: B. Mandible
The mandible is the lower jawbone and is the strongest bone in the human face. It is attached to the skull by the temporomandibular joint, allowing for chewing and speech. It holds the lower teeth in place.