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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Low platelet count: A low platelet count stimulates the production of more platelets, not red blood cells. Platelets are involved in clotting, and their regulation is independent of red blood cell production.
B. High blood pressure: Blood pressure does not directly trigger red blood cell production. It is regulated by cardiac output and vascular resistance, not by erythropoiesis.
C. Low oxygen levels in the blood: Hypoxia stimulates the kidneys to release erythropoietin, which signals the bone marrow to increase red blood cell production. This process enhances the blood’s oxygen-carrying capacity.
D. Increased white blood cell count: An elevated white blood cell count typically indicates infection or inflammation and does not directly influence the production of red blood cells in the bone marrow.
Correct Answer is D
Explanation
A. To protect the brain: The brain is protected by the skull, which is a part of the axial skeleton. The pelvic girdle is located in the lower body and has no role in cranial protection. Its function is primarily structural and supportive rather than protective of the head.
B. To facilitate breathing: Breathing is supported by the diaphragm and ribcage, which expand and contract to allow air movement. The pelvic girdle does not contribute to respiratory mechanics but serves as a base for muscular attachment.
C. To connect the shoulder to the axial skeleton: The shoulder connects to the axial skeleton via the pectoral (shoulder) girdle, not the pelvic girdle. The pelvic girdle instead connects the lower limbs to the axial skeleton, providing stability for weight-bearing.
D. To support the weight of the upper body: The pelvic girdle bears the weight of the upper body and distributes it to the lower limbs. It also provides attachment points for muscles that aid in posture, locomotion, and movement, while supporting internal organs in the pelvic region.
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