Skeletal System — Set 3
Biology · कंकाल तंत्र · Questions 21–30 of 50
Which part of the skeleton includes the bones of the limbs and girdles?
Correct Answer: C. Appendicular skeleton
The appendicular skeleton consists of 126 bones in the human body. It includes the pectoral girdles, pelvic girdle, and the bones of the upper and lower limbs. Its primary function is to facilitate movement and protect organs in the lower trunk.
Which of the following is the smallest bone in the human body?
Correct Answer: A. Stapes
The stapes is a bone in the middle ear involved in the conduction of sound vibrations. It is roughly the size of a grain of rice. It is the lightest and smallest bone found in the human skeletal system.
How many bones make up the adult human skull (including the face)?
Correct Answer: D. 22
The skull is composed of 22 bones: 8 cranial bones and 14 facial bones. The cranial bones protect the brain, while facial bones provide the structure for the face. Except for the mandible, all these bones are fused together.
Which type of joint is found at the human elbow?
Correct Answer: C. Hinge joint
A hinge joint allows movement primarily in one plane, similar to a door hinge. This allows for bending and straightening of the arm. The knee and ankle are also examples of hinge joints.
Which of the following bones is found in the human leg?
Correct Answer: A. Fibula
The fibula is the outer and thinner of the two long bones in the lower leg. It runs parallel to the tibia and provides attachment points for muscles. It does not bear much of the body's weight but stabilizes the ankle.
What is the name of the bone that forms the forehead?
Correct Answer: B. Frontal bone
The frontal bone is a bowl-shaped bone that protects the frontal lobe of the brain. It also forms the upper part of the eye sockets. In infants, this bone is divided into two parts by a suture.
Which of the following is a disorder caused by Vitamin D deficiency in children?
Correct Answer: B. Rickets
Rickets causes the softening and weakening of bones in children. This happens because Vitamin D is necessary for the absorption of calcium from the gut. It can lead to skeletal deformities such as bowed legs.
The tissue that connects one bone to another bone is called a?
Correct Answer: B. Ligament
Ligaments are tough, elastic bands of connective tissue that stabilize joints. They limit the range of motion to prevent injury. Unlike tendons, they do not connect muscles to bones.
How many ribs are present in the human body (total number)?
Correct Answer: C. 24
The human rib cage consists of 12 pairs of ribs, making a total of 24. They are attached to the thoracic vertebrae at the back. Most ribs are attached to the sternum in the front via costal cartilage.
Which bone is the longest and strongest in the human body?
Correct Answer: A. Femur
The femur, or thigh bone, extends from the hip to the knee. It supports the entire weight of the upper body during walking or jumping. It is the most voluminous bone in the skeletal system.