Which question about the heart valves is false: blood through the pulmonary valv

Question

Which question about the heart valves is false: blood through the pulmonary valve and into the pulmonary vein oxygenated blood goes through the mitral valve and into the left ventricle blood from the left ventricle goes through the aortic semi lunar valve into the anta deoxygenated blood leaves the right atrium and goes through the tricuspid value the bicuspid value in oxygenated blood and the tricuspid value is in deoxygenated blood when comparing a skeletal muscle cell to a eradiate muscle cell (myocyte), which is false: cardiac myocytes have gap junctions but skeletal muscle cells do not have these integral membrane protein Chan both cardiac myocytes and skeletal muscle cells have voltage-gated potassium channels on their cell membranes both skeletal muscle cells and cardiac myocytes have a sarcoplasmic reticulum that has bight calcium Concentra both skeletal muscle cells and cardiac myocytes have T-tubules that carry the action potential into the interior cardiac myocytes have dithydropyridine-rynodine channels that release calcium from the sarcoplasmic retina Which of the following will increase carbine output (remember: CO = HR times SV): an increase in parasympathetic nerve activity to the heart an increase in the permeability of sodium and calcium in sinoatrial nodal cells a very large increase in arterial pressure causing an increase in after load a decrease in venous return to the heart causing a decrease in stretching of the heart muscle inadequate oxygenation of cardiae myocytes, causing a decrease in contractility

Explanation / Answer

16. What happens during nerve gas poisoning.

a. The gas blocks acetylcholine esterase.

Because acetylcholine esterase are responsible for break down of acetylcholine in the synapse. Acetylcholine gives the signal to the muscle to contract by preventing them from relaxation. So nerve gas poisoning results in damaging nerves and even inhibiting acetylcholine esterase.

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