Where are the respiratory control areas located?
Hypothalamus
Pons and medulla oblongata
Alveoli
Cerebral cortex
The Correct Answer is B
A. Hypothalamus -The hypothalamus regulates autonomic functions like temperature, but not primary breathing rhythms.
B. Pons and medulla oblongata -The medulla sets the basic rhythm of breathing, and the pons fine-tunes it.
C. Alveoli -Alveoli are sites of gas exchange, not neural control.
D. Cerebral cortex -The cortex allows voluntary control of breathing but is not the main respiratory control center.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. AV node: The impulse travels from the SA node through atrial pathways to the AV node next—this is the normal sequence.
B. Bundle of His: Comes after the AV node, not immediately after the SA node.
C. Purkinje fibers: Terminal conduction fibers in the ventricles; far downstream from the SA node.
D. AV bundle: Another name for the Bundle of His, which still comes after the AV node.
Correct Answer is A
Explanation
A. Inflammation: inflammation causes vasodilation and increased capillary permeability so immune cells and plasma components reach the injured/infected tissue.
B. Activation of NK cells: NK cell activation is an innate cytotoxic response against infected or malignant cells but does not itself describe the vascular changes listed.
C. Complement activation: complement promotes opsonization, chemotaxis, and membrane attack, but the described vasodilation/permeability hallmark is inflammation.
D. Activation of mononuclear phagocytic system: activation of macrophages/monocytes contributes to defense and cleanup, but the vascular response described is specifically the inflammatory process.
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