What is the primary characteristic of fibrous joints?
Freely movable joints
Allow rotational movement
Immovable joints
Composed of cartilage
The Correct Answer is C
A. Freely movable joints: Freely movable joints, such as synovial joints, allow a wide range of motion and are not characteristic of fibrous joints, which are mostly rigid.
B. Allow rotational movement: Rotational movement is typical of specific synovial joints like the pivot joint, not fibrous joints. Fibrous joints have very limited or no movement.
C. Immovable joints: Fibrous joints are connected by dense connective tissue and are largely immovable, providing stability and strength between bones, such as in the sutures of the skull.
D. Composed of cartilage: Joints composed of cartilage are classified as cartilaginous joints, not fibrous joints, which are made of dense fibrous connective tissue.
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Related Questions
Correct Answer is C
Explanation
A. To connect the upper and lower limbs: While the vertebral column provides attachment points for muscles and limbs, its primary role is not connecting the limbs directly.
B. To protect the heart and lungs: Protection of the heart and lungs is mainly provided by the thoracic cage, not the vertebral column.
C. To support the body and protect the spinal cord: The vertebral column provides structural support, maintains posture, and encases the spinal cord within the vertebral canal, safeguarding it from injury while allowing flexibility.
D. To protect the brain: The brain is protected by the skull; the vertebral column protects only the spinal cord, which is continuous with the brain.
Correct Answer is B
Explanation
A. To connect muscle to muscle: Connections between muscles are generally formed by aponeuroses or fascia, not tendons, and this is not their primary role in movement.
B. To connect muscle to bone: Tendons are strong, fibrous connective tissues that attach muscles to bones, allowing the force generated by muscle contraction to move the skeleton efficiently.
C. To store energy for muscle contraction: While elastic components in muscles and tendons can store some energy, the primary function of tendons is structural connection, not energy storage.
D. To protect the muscle during contraction: Tendons provide stability and transmit force, but they do not directly shield muscles from injury during contraction.
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