Ganong Physiology Mcq Pdf Apr 2026

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

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Explanation: Hyperventilation → excessive CO2 exhalation → respiratory alkalosis (↓PaCO2, ↑pH). Explanation: SA node pacemaker activity relies on the

A) Increased ADH secretion B) Decreased glomerular filtration rate C) Osmotic diuresis from glucosuria D) Inhibition of sodium reabsorption in the loop of Henle ganong physiology mcq pdf

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

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

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