Skeletal System — Set 5
Biology · कंकाल तंत्र · Questions 41–50 of 50
Which bone is found in the human forearm on the side of the thumb?
Correct Answer: C. Radius
The radius is one of the two long bones in the forearm. It rotates around the ulna to allow for the turning of the palm. It is shorter than the ulna and thickens at the wrist.
The phalanges are the bones found in which part of the body?
Correct Answer: B. Fingers and Toes
The correct answer is 'Fingers and Toes'. Phalanges are the digital bones of the hands and feet. Each finger and toe has three phalanges, except for the thumb and big toe, which have two. There are 56 phalanges in the human body in total.
Which of the following protects the brain?
Correct Answer: C. Cranium
The cranium is the part of the skull that encloses and protects the brain. It is made up of eight cranial bones joined by sutures. It provides a rigid box that safeguards the central nervous system.
Which joint allows only limited movement, such as between vertebrae?
Correct Answer: D. Cartilaginous joint
Cartilaginous joints are connected entirely by cartilage. They allow more movement than fibrous joints but less than synovial joints. The pubic symphysis is another example of such a joint.
How many bones are in the adult human spinal column (Total)?
Correct Answer: A. 26
The adult vertebral column consists of 26 bones: 24 individual vertebrae, the sacrum, and the coccyx. It serves as the main support for the body's posture. It also protects the spinal cord from damage.
The bone of the heel is scientifically known as the?
Correct Answer: C. Calcaneus
The calcaneus is the largest of the tarsal bones in the foot. It forms the heel and provides an attachment point for the Achilles tendon. It helps in absorbing the impact of walking.
Which type of cells are responsible for breaking down bone tissue during remodeling?
Correct Answer: B. Osteoclasts
Osteoclasts are large multinucleated cells that resorb bone matrix. This process is essential for maintaining calcium levels in the blood and bone repair. They work in balance with osteoblasts which build new bone.
What is the common name for the 'Breastbone'?
Correct Answer: C. Sternum
The sternum is a long flat bone located in the central part of the chest. It serves as a keystone for the rib cage. It is important for protecting the heart and as a site for bone marrow aspiration.
Which part of the ear contains the three smallest bones of the body?
Correct Answer: D. Middle ear
The middle ear contains the malleus, incus, and stapes, also known as the ossicles. They amplify sound waves and transmit them to the inner ear. These bones are the first to reach full size before birth.
Which of the following bones is NOT part of the axial skeleton?
Correct Answer: A. Femur
The femur is part of the appendicular skeleton as it belongs to the lower limb. The axial skeleton only includes bones along the vertical axis of the body. There are 80 bones in the axial skeleton and 126 in the appendicular.