Ganong | Physiology Mcq Pdf

Explanation: Hyperventilation → excessive CO2 exhalation → respiratory alkalosis (↓PaCO2, ↑pH).

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A) Rapid influx of Na+ through fast voltage-gated channels B) Inward “funny current” (If) carried mainly by Na+ and K+ efflux decrease C) Exclusive T-type Ca2+ channel activation D) Na+/Ca2+ exchanger operating in reverse mode ganong physiology mcq pdf

A) Decreased renin release B) Increased angiotensin II formation C) Decreased aldosterone secretion D) Increased ANP release

A) Increased parasympathetic (vagal) efferent activity to SA node B) Decreased sympathetic efferent activity to the heart C) Increased sympathetic efferent activity to the heart D) Increased atrial natriuretic peptide (ANP) secretion A) Rapid influx of Na+ through fast voltage-gated

A) Increased PaCO2, increased pH B) Decreased PaCO2, increased pH C) Decreased PaCO2, decreased pH D) Increased PaCO2, decreased pH

Explanation: SA node pacemaker activity relies on the hyperpolarization-activated funny current (If) – mixed Na+/K+ inward current, plus decreasing outward K+ current. increased pH B) Decreased PaCO2

Explanation: Hyperglycemia exceeds renal glucose reabsorption threshold → glucose in tubules → osmotic retention of water → increased urine output.