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How do parasympathetic neural signals af...

How do parasympathetic neural signals affect the working of heart

A

Heart rate decreases but cardiac out- put increases

B

Reduce both heart rate and cardiac out- put

C

Heart rate is increased without affect- ing the cardiac output

D

Both heart rate and cardiac output in- crease

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How do parasympathetic neural signals affect the working of the heart?

How do parasympathertic neural signals affect the working the heart

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

Assertion : Neural signals through sympathetic nerves can increase the strength of ventricular contraction Reason : Parasympathetic neural signals synergistically act with sympathetic neutral signal to increase the cardiac output.

If parasympathetic nerve of the rabbit is cut then heart beat

In which the following can increase the rate of heart beat ? (A) Sympathetic neaural signals. (B) Parasympathetic neural signals (C ) Adrenal medullary hormones. (9 ) Vagus nerve (E ) Thyroxine hormone (F) Acetylcholine

Which of the following options correctly idenifies the effect of sympathetic and parasympathetic neural system on given features or organs ?

Which of the following statement is CORRECT ? I. Heart, the mesodermally derived organ, is situated in the thoracic cavity, in between the two lungs , slightly tilted to the left. II. During joint diastole , tricuspid and bicuspid valves are open and the semilunar values are closed. III. The first heart sound (lub) is associated with the closure of the tricuspid and biscuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves . IV. Neural signals through the sympathetic nerves can increases the rate of hearbeat, the strength of ventricular contraction and thereby the cardiac output.

Parasympathetic stimulation of the heart

The cranial nerves in humans that send parasympathetic stimulation to, among other organs, the heart, stomach, and liver are :

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