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.
Doubtnut Promotions Banner Mobile Dark
|

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

Sympathetic/parasympathetic nerve fibres decrease rate of heart beat.

Neural signal through the sympathetic nerve (part of ANS) increases cardiac output because of -

Knowledge Check

  • 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

    A
    b,c and e
    B
    a,d and f
    C
    b,d and f
    D
    a,c and e

  • Parasympathetic neural signal decreases cardiac put by -

    A
    Decreasing the rate of heart beat
    B
    Decreasing the speed conduction of action potential
    C
    Both
    D
    Increasing adrenal medulla hormones secretion

  • 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.

    A
    If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion .
    B
    If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion
    C
    If Assertion is True but the Reason is False.
    D
    If both Assertion & Reason are false.

    • Similar Questions

    Explore conceptually related problems

    If the heart rate of a person has increased but the stroke volume is same. The cardiac output will

    Which of the following statements are incorrect w.r.t. regulation of cardiac activity? A. Neural signals through the sympathetic nerves can increase the rate of heart beat and cardiac output. B. Parasympathetic neural signals decrease the speed of conduction of cardiac impulse, so stroke volume is increased. C. Sympathetic nervous system increases the strength of ventricular contraction and stroke volume is same. D. Parasympathetic nervous system decreases the heart rate, cardiac output and stroke volume. Incorrect statements are

    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.

    Home
    Profile