Home
Class 11
BIOLOGY
neural signals through parasympathetic n...

neural signals through parasympathetic neural signals (another comonent of ANS) can
a. Increase the heart beat rate
b. Decrease the heart beat rate
c. increase the strength of ventricular contraction
e. Increase cardiac output
f. Decreases cardiac output

A

b,c and e

B

a,d and f

C

b,d and f

D

a,c and e

Text Solution

Verified by Experts

The correct Answer is:
C
On the other hand, parasympathetic neural signals (another component of ANS) decrease the rate of heart beat, speed of conduction of action potential and thereby the cardiac output.
Parasympatetic nerves or vagus nerve decrease the heartbeat by secreating acetylcholine.
Heart beat si regulated by cardiac branch of Vagus nerve.
If Vagus or parasympathetic nerve to heart is cut, the heart beat will increase.
Promotional Banner

Topper's Solved these Questions

  • BODY FLUIDS AND CIRCULATION

    A2Z|Exercise Section A : Topicwise Questions Topic 6: Sisorder Of Circulatory System|15 Videos

  • BODY FLUIDS AND CIRCULATION

    A2Z|Exercise Section B: Assertion-reasoning Questions|12 Videos

  • BODY FLUIDS AND CIRCULATION

    A2Z|Exercise Section A : Topicwise Questions Topic 4: Circulatory Pathways|43 Videos

  • BIOMOLECULES

    A2Z|Exercise Section D: Chapter End Test|50 Videos

  • BREATHING AND EXCHANGE OF GASES

    A2Z|Exercise Section D: Chapter-end Test|50 Videos

Similar Questions

Explore conceptually related problems

neural signal through autonommic nervous system (ANS) can a. Increase the heart beat rate b. Decrease the heart beat rate c. Increase the strength of ventricular contraction d. Decrease the speed of conduction of action potential e. Increase cardiac output f. Decrease cardiac output

Assertion : Neural signals through the sympathetic nerves can increase the rate of heart beat, the strength fo ventriculrar contraction and thereby the cardiac output. Reason : Adrenal medullary hormones can increase the cardiac output.

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

Decrease in the rate of heart beat, speed of conduction of action potential and thereby the cardiac output is under the control of

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.

Sympathetic/parasympathetic nerve fibres decrease rate of heart beat.