What is a joint?
A place where two or more bones meet.
A type of blood cell.
A type of muscle tissue
A part of the skeletal system.
The Correct Answer is A
Rationale:
A. A joint (also called an articulation) is the location where bones come together. Joints allow varying degrees of movement, depending on their type: synarthroses (immovable), amphiarthroses (slightly movable), and diarthroses (freely movable, also called synovial joints).
B. Blood cells (red blood cells, white blood cells, platelets) are components of blood, not related to joints.
C. Muscle tissue is contractile tissue that enables movement, but it is not the definition of a joint.
D. While technically true that joints are part of the skeletal system, this answer is too vague and does not fully define what a joint actually is.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Rationale:
A. Internal intercostal muscles assist with forced expiration by pulling the ribs downward and inward but are not the primary muscle for breathing.
B. Diaphragm is the main muscle of inspiration; when it contracts, it flattens and increases the thoracic cavity volume, allowing air to flow into the lungs. The diaphragm’s continuous rhythmic activity is essential for effective ventilation.
C. External intercostal muscles assist with inspiration by elevating the ribs, but their role is secondary to the diaphragm.
D. Rectus abdominis muscles are involved in forced expiration and trunk movement but do not serve as the primary muscle for breathing.
Correct Answer is A
Explanation
Rationale:
A. The joints between the vertebrae are examples of amphiarthroses, which are slightly movable joints connected by cartilage (intervertebral discs). These joints provide both support and flexibility, allowing limited motion while protecting the spinal cord.
B. The wrist contains synovial joints (diarthroses), which allow free movement in multiple directions, not amphiarthrosis.
C. The shoulder joint is a ball-and-socket synovial joint, making it freely movable (diarthrosis), not slightly movable.
D. The sutures of the skull are synarthroses, which are immovable fibrous joints.
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