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Tara Quist

Physiology Weeks 7-13

QuestionAnswer
The resting membrane potential of a typical neuron is primarily maintained by: Sodium potassium pump
During skeletal muscle contraction, which molecule directly binds to myosin to release the cross-bridge from actin? ATP
The plateau phase of the cardiac action potential is due to: Calcium influx
Which hormone increases blood pressure by promoting sodium and water retention? Aldosterone
The primary stimulus for increased ventilation under normal conditions is: High carbon dioxide levels
The majority of water reabsorption in the nephron occurs in the: Proximal convoluted tubule
In metabolic acidosis, the kidneys help restore pH by: Excreting more H⁺ and reabsorbing bicarbonate
Which hormone increases blood glucose levels by stimulating glycogen breakdown in the liver? Glucagon
Which neurotransmitter is primarily excitatory at neuromuscular junctions? Acetylcholine
The hormone that stimulates pancreatic enzyme secretion and gallbladder contraction is: Cholecystokinin (CCK)
Which type of skeletal muscle fiber is best suited for prolonged, low-intensity activity due to high mitochondrial density? Slow oxidative fibers
During exercise, which mechanism primarily increases venous return to the heart? Skeletal muscle pump
Created by: user-1993011
 

 



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