The rate of heartbeat is regulated by the integrated activity of inhibiting and accelerating effects occuring in which part of the brain ?A. CerebellumB. DiencephalonC. Medula oblongataD. Pons Vorolii

The rate of heartbeat is regulated by the integrated activity of inhib

1.	The rate of heartbeat is regulated by the integrated activity of inhibiting and accelerating effects occuring in which part of the brain ?A. CerebellumB. DiencephalonC. Medula oblongataD. Pons Vorolii
Answer» Correct Answer - C A special neutral centre in the medulla oblongata can moderate the cardiac function through autonomic nervous system (ANS). Neutral signals through the sympathetic nerves (part of ANS) can increase the rate of heartbeat, the strength of ventricular contraction and thereby the cardiac output. On the other hand, parasympathetic neutral signals (another component of ANS) decrease the rate of heartbeat, speed of conduction of action potential and thereby the cardiac output.

Discussion

No Comment Found

Related InterviewSolutions

Sphygmomanometer MeasureA. Nerve conduction rateB. Heart beat rateC. Blood pressureD. Pulse rate
Blood of which vessel in mammals carries least percentage of urea ?A. Renal veinB. Dorsal aortaC. Renal arteryD. Posterior vena cava
Assertion: Lymph is a colourless fluid containing specialised lymphocytes which are responsible for the immune response of the body Reason: Lymph is an important carried for ntrient, hormones, etc.A. If both asseration and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true reason is false.D. If both assertion and reason are false.
In ECG, P-R interval corresponds toA. time delay in A-V nodeB. S-A nodal conduction timeC. increased ventricular contractionD. time interval between onset of ventricular contraction
Foramen ovaleA. Connects the two atria in the foetal heartB. Connects pulmonary trunk and aorta in foetusC. Is condition in which heart valves do not completely closeD. Is a shallow depression in the inter-ventricular septum
Foramen ovale is present only in the heart of embryos leading from the right atrium toA. left atriumB. right ventricleC. postcaval veinD. pulmonary artery
High level of which ions change the strength of contractionA. `Ca^(+2)`B. `K^(+)`C. `Na^(+)`D. All of these
Isovolumetric systole is duration betweenA. Closure of AV valve and opening of semilunar valveB. Closure of semilunar valve and opening of AV valveC. Closure of tricuspid and closure of bicuspid valveD. Closure of tricuspid and opening of bicuspid valve
Systole refers to the contraction ofA. SA nodeB. AV nodeC. Major arteriesD. Atria and ventricles
The volume of blood that enters into the aorta with each ventricular systole is calledA. Cardiac cycleB. Stroke volumeC. Cardiac outputD. Vital capacity

The rate of heartbeat is regulated by the integrated activity of inhibiting and accelerating effects occuring in which part of the brain ?A. CerebellumB. DiencephalonC. Medula oblongataD. Pons Vorolii

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment