Yes, it is required to because of a greater O2 demand from the muscles. Main mechanism to increase stroke volume is increased heart rate, as cardiac output equals HR times by stroke volume (volume of blood ejected from the heart in contraction).
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Cardiac Output is computed as your heart rate times your stroke volume (volume of blood ejected from the heart each beat). The main contributor when exercising is an acceleration in heart rate. Stroke volume can be increased, but only by prolonged aerobic training. To answer your Q, HR as has the main effect on cardiac output during the first stages of exercise.**The first few stages of cardiac exercise will 'affect' cardiac output, not 'effect' it. If you don't know the difference between the two, you should not be asking a question such as this...
Both, peripheral resistance decreases and cardiac output increases.
The pressure in the pulmonary artery increases during exercise if the cardiac output increases.
Cardiac output typically decreases during dehydration. When fluid levels are low, there is less circulating blood volume, leading to a decrease in the amount of blood pumped out by the heart per minute. This reduction in cardiac output helps conserve remaining fluids in the body.
Yes - an increase in contractility would lead to an increase in stroke volume. An increased stroke volume would cause an increased cardiac output.
Cardiac output is the total volume of blood that is pumped by the heart per minute. When you exercise, there is a greater demand for oxygen, which is carried in your blood, thus your cardiac output increases.
A decrease or increase of cardiac output in the body can result to several health problems depending on the body's health conditions. A stroke is prevalent if there is an increase of cardiac output that cannot be handled by the system. Lack of oxygen in the brain is an effect of a decrease cardiac output on the other hand.
The cardiac reserve capacity is the difference between the rate at which the heart pumps blood and its maximum capacity for pumping blood a any given time. It's the potential capacity of the heart to function well beyond its basal level.
Yes, fever can increase cardiac output. Fever indicates infection so blood will flow more in order to get WBCs to the affected area.