Explanation: Hypotension reduces baroreceptor firing → increased sympathetic outflow to heart (β1 receptors) → increased HR. Vagal tone decreases, not increases.
A) Decreased renin release B) Increased angiotensin II formation C) Decreased aldosterone secretion D) Increased ANP release ganong physiology mcq pdf
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Explanation: Hyperventilation → excessive CO2 exhalation → respiratory alkalosis (↓PaCO2, ↑pH). ganong physiology mcq pdf