Which type of muscle is found throughout the digestive and urinary tracts?
Cardiac muscle
Smooth muscle
Vascular muscle
Skeletal muscle
The Correct Answer is B
A. Cardiac muscle: Found only in the heart and specialized for rhythmic contraction, not the digestive or urinary tracts.
B. Smooth muscle: Found throughout the walls of the digestive tract and urinary tract, producing slow, involuntary contractions (peristalsis and urinary propulsion).
C. Vascular muscle: Blood vessel walls contain smooth muscle components, but the term is not used for the muscles of the digestive/urinary tract.
D. Skeletal muscle: Voluntary, striated muscle attached to bones for movement; it does not constitute the muscular wall of the digestive or urinary tracts.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Glucagon: Raises blood glucose by stimulating glycogenolysis and gluconeogenesis in the liver, so it does not decrease glucose.
B. Cortisol: Increases blood glucose through gluconeogenesis and reducing peripheral glucose uptake during stress.
C. Insulin: Lowers blood glucose by promoting cellular uptake of glucose and stimulating glycogen synthesis and storage.
D. Aldosterone: Regulates sodium and potassium balance in the kidneys and indirectly influences fluid volume, not directly responsible for lowering blood glucose.
Correct Answer is D
Explanation
A. Pulmonary veins: These vessels return oxygenated blood from the lungs to the left atrium, not to the rest of the body.
B. Pulmonary arteries: These transport deoxygenated blood from the right ventricle to the lungs for oxygenation.
C. Superior vena cava: This large vein delivers deoxygenated blood from the upper body into the right atrium.
D. Aorta: This is the main artery that carries oxygen-rich blood from the left ventricle to systemic circulation.
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