In which type of joint are two bones joined by cartilage?
Amphiarthroses
Diarthroses
Synarthroses
Synovial joint
The Correct Answer is A
Rationale:
A. Amphiarthroses are slightly movable joints where bones are connected by cartilage. Examples include the intervertebral discs (between vertebrae) and the pubic symphysis. These joints allow limited movement while providing strength and stability.
B. These are freely movable joints, also known as synovial joints (such as the knee, elbow, and shoulder). They are not primarily joined by cartilage but by a synovial cavity and ligaments.
C. These are immovable joints where bones are connected by fibrous tissue, such as the sutures of the skull. They do not involve cartilage.
D. A type of diarthrosis characterized by a synovial cavity filled with fluid, articular cartilage, and supporting ligaments, allowing free movement. They are not defined solely by cartilage connections.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. The dermis lies beneath the epidermis and contains blood vessels, lymphatic vessels, nerves, sweat glands, sebaceous glands, and hair follicles. The blood vessels in the dermis play a key role in regulating body temperature and nourishing both the dermis itself and the avascular epidermis above it.
B. Also called the hypodermis, this layer lies below the dermis and is composed mainly of fat and connective tissue. While it provides insulation, cushioning, and energy storage, the question specifically asks for the skin layer containing blood vessels, which is the dermis.
C. The epidermis is the outermost skin layer. It is avascular, meaning it contains no blood vessels. It relies on diffusion from the dermis for nutrient and waste exchange.
D. Another name for the subcutaneous layer. Although it contains larger blood vessels that supply the dermis, it is technically not considered part of the skin itself.
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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