The “Mayer waves” in the blood pressure originate due to (1) systole and diastole of ventricle (2) inspiration and expiration (3) reflex oscillation of neural pressure control mechanisms (4) Bainbridge […]
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CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Understanding Arterial Pulse Wave in Cardiac Cycle: Matching Pressure Wave Points with Key Features
The blood forced into aorta during systole sets up a pressure wave that travels along arteries (arterial pulse wave). The following figure depicts the pressure wave recorded from an artery […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Matching Cardiac Cycle Events with Left Atrial, Ventricular, and Aortic Pressure Changes
The changes in left atrial, left ventricular and aortic pressure in a cardiac cycle are shown below in the figure Given below are the events of cardiac cycle (column A) […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
How to Calculate Ventricular Diastolic Time From Atrial Systole, Diastole and Ventricular Systole
The time taken for atrial systole and diastole in a normal heart are tas and tad seconds, respectively. If ventricular systole takes tvs seconds, calculate the ventricular diastolic time (seconds) […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Understanding the Relationship Between Atrial and Ventricular Systole and Diastole Durations in the Cardiac Cycle
For a normal heart, the time taken for atrial systole and diastole are As and Ad seconds, respectively, while the same for ventricular systole and diastole are Vs and Vd. […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Understanding the Cardiac Pacemaker Action Potential: Ion Channel Dynamics Explained
The action potential recorded from pace maker tissue (SA/AV node) of mammalian heart is shown in the following diagram: On the basis of mechanism of generation of action potential in […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Neural Connections and Functions of Cardiac Nerves in Adult Humans: Vagus and Sympathetic Nerve Insights
The following statements are made with reference to the neural connections of cardiac tissues and the functions of these nerves on heart in adult humans: A. The right vagus nerve […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Effects of Cholinergic Vagal Stimulation on SA Node Pacemaker Potential and Impulse Generation
The effects of stimulation of cholinergic vagal fibers on the pacemaker potential of the cells of sinoatrial (SA) node of heart and on the nodal impulse generation are suggested below: […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
How Vagus Nerve Inhibits SA Node: Mechanisms of Pacemaker Cell Regulation Explained
The pacemaker cells of sinoatrial node (SA node) are inhibited by the stimulation of vagus nerve. The probable mechanisms of this inhibition are stated as follows: A. The acetylcholine-regulated K+ […]
CSIR NET Life Science Previous Year Questions and Solution on Animal Physiology
Ion Channels Involved in Pacemaker Potential of the Heart: What You Need to Know
4. Which one of the following is NOT involved with the pacemaker potential of heart? (1) “h”- channel (2) Transient calcium channel (3) Long-lasting calcium channel (4) “f”-channel The […]
