STANDARDZoology-Human Physiology
STANDARD Zoology Cardiovascular System MCQ Question
Type: MCQ-conceptual-Medium
Cardiac activity could be moderated by the autonomous neural system. Tick the correct answer
A
The parasympathetic system stimulates heart rate and stroke volume
B
The sympathetic system stimulates heart rate and stroke volume
C
The parasympathetic system decreases the heart rate but increase stroke volume
D
The sympathetic system decreases the heart rate but increase stroke volume
Correct Answer
Option B
Detailed Explanation
Sympathetic system stimulates heart rate and stroke volume. Increased sympathetic stimulation increases heart rate by acting on cardiac pacemaker cells and affects stroke volume by increasing contractility of cardiac muscle cells and the amount of intracellular calcium available during contraction.
Found an issue with this question?