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During exercise the cardiac output may rise to five times the resting value In most people this is due mainly to an increase in?
Huntingp5
heart rate
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∙ 15y ago
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How intrinsic control mechanisms cause cardiac output to increase during exercise?
that means that she wants you
How is the blood redistrubtied around the body during exercise?
The normal cardiac out put is five litres per minute. About 700 ml blood goes to the resting muscles. During heavy exercise the cardiac out put may increase to five fold, that is about 25 litres per minute. Out of this about 20 litres of blood will go to the muscles. This is done in order to supply the nutrients and necessary oxygen to the tissue.
What happens to the BP of a poorly-conditioned individual after a vigorous exercise compared to a well-conditioned athlete?
"BP is indirectly indicated by intensity or exertion levels. The systolic BP is expected to rise because of the increase in cardiac output. Diastolic BP is expected to remain equivalent to resting levels or decrease during exercise indicating an increase of vasodilation and an opening of the capillary beds." (Collegetermpapers)
During exercise will Cardiac Output increase?
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).
Are there more sodium ions inside or outside a cardiac muscle cell during the resting membrane potential?
Outside
How would an increased heart rate help someone in exercise?
Maximum stroke volume (the volume of blood pumped from the heart) is fairly constant - thus to increase cardiac output you must increase heart rate. Note that increasing the heart rate WITHOUT increasing the return blood flow to the heart (which does happen during exercise), all that happens is that the stoke volume drops.
What does a patient have to do during cardiac rehab?
There are many activities that a patient has to do during cardiac rehab. Some of these activities help improve cardiovascular health, such as as running, and daily exercise activities
What precautions are taken before and after exercise during a cardiac rehabilitation program?
Blood pressure is carefully monitored before and after exercise sessions, and patients are taught how to measure their heart rate and evaluate any possible cardiac symptoms during each session.
What is the relaxing phase of the cardiac cycle?
The resting phace of the cardiac cycle is known as the refractory period
What would happen to the blood pressure in the pulmonary artery if more blood is drived to the lungs during exercise?
The pressure in the pulmonary artery increases during exercise if the cardiac output increases.
What happens to your heart rate when you excercise?
Depending on how light or heavy exercise is will depend on the change that occurs. Typically during exercise heart rate will increase. This is in order to increase blood flow to the working muscles to allow for increased respiration - in order for the muscles to work efficiently. Therefore the more strenuous the exercise, the more your heart rate will increase. Blood pressure will also increase during exercise and again depends on intensity levels. During exercise such as running/cycling/swimming systolic pressure will increase progressively whereas diastolic pressure will increase only slightly. During weight lifting exercises, both systolic and diastolic pressures will rise. Obviously these effects will vary from person to person, depending on age, gender, exercise level, exercise intensity etc. etc.
Why does your heart beat faster and your breathing goes faster when you exercise?
Your resting cardiac out put is about five liters per minute. During the exercise the cardiac out put increases from five liters to more than twenty five liters per minute. Muscles get about twenty liters of blood per minute. The heart has to beat faster to provide this extra blood. Faster breathing provide the extra oxygen, that is needed for the metabolism of the muscles.
