Cellular & General Physiology
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Cellular & General Physiology Physiology practice questions
This section of the Saturn Medic Physiology question bank covers 4 topics under Cellular & General Physiology: Action Potential & Excitability (30 questions); Cell Membrane & Transport (30 questions); Cell Signaling & Receptors (30 questions); and Resting Membrane Potential (30 questions).
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Cellular & General Physiology Physiology MCQs: mixed practice questions
Try 4 sample questions drawn from across Cellular & General Physiology. Tap an answer to check it.
A voltage-gated Na+ channel has its activation gate open but its inactivation gate closed. The channel is:
From: Action Potential & ExcitabilityCorrect answer: B. During depolarization, the Na+ activation gate opens rapidly, while the slower inactivation gate closes and stops Na+ flow.Which drug class directly inhibits the gastric H+,K+-ATPase?
From: Cell Membrane & TransportCorrect answer: D. Proton pump inhibitors such as omeprazole inhibit the H+,K+-ATPase of gastric parietal cells.Which neurotransmitter is formed from tryptophan and can be converted to melatonin in the pineal gland?
From: Cell Signaling & ReceptorsCorrect answer: A. Serotonin is formed from tryptophan and is converted to melatonin in the pineal gland.A membrane potential becomes less negative when an inward positive-ion current exceeds outward positive-ion current. This change is called:
From: Resting Membrane PotentialCorrect answer: E. A net inward positive current makes the intracellular membrane potential less negative, producing depolarization.