Unit 2 Acute response to exercise is short term effects that exercise has on the body. Musculoskeletal response An acute response of the musculoskeletal system during exercise includes an increase in blood supply. The short term effects on your muscles increases the temperature therefore there is more activation energy so chemical reactions are used by the musculoskeletal system and the metabolic activity increases. As the oxygen demand increases, more oxygenated blood needs to be supplied to the muscles so vasodilatation occurs so more blood can pass through the arteries. This affected me during the bleep test because vasodilation allows more oxygenated blood to travel to the actively respiring muscle tissues.
When you are exercising different changes occur in the body to try and deal with the change in the environment and the reaction that occurs in the body. I will also explain the homeostatic mechanisms when someone exercises. Homeostasis is for the process of the body to maintain a relatively consistent internal state. The nervous system sends and receives signals about temperature, hydration, blood pressure and much more factors. The endocrine system carries chemical messengers to adjust bodily functions.
Restate your predictions that were correct and give data from your experiment that support them. Restate your predictions that were not correct and correct them, giving supporting data from your experiment that supports your corrections. During exercise HR, SV, and CO will all increase due to the increased demand of oxygen needed throughout the body as well as the increased pumping action of the heart having to work faster to get blood to the tissues during exercise Application 1. We measured the stroke volume of the left ventricle. What was the average stroke volume of the right ventricle at rest and
It is calculated by stroke volume x heart rate. Both the stroke volume and cardiac output will determine how much blood is pumped around the body therefore determining how much oxygen will reach the working muscles. The more blood pumped out of the heart the more work an individual can do. This will enhance performance in a 400m race because the individual’s heart will pump more blood around the body and deliver more oxygen to the working muscles allowing more work to be done. Increase in Respiratory rate and Tidal volume Tidal volume is the amount of air breathed in and out with each breath and respiratory rate is the rate at much a person
It is produced by the sweat glands and pours out onto the surface of the skin, the water then evapoarates which removes heat from the skin therefore cooling the skin down. Whenever your body feels a change on the outside, it must account for and adjust functions inside the body in order to maintain its normal state. When you exercise, your muscle tissues demand more oxygen. The body responds to this increased demand by increasing blood flow, which creates higher blood pressure. In order to get more oxygen into your body and into your blood to flow to those muscles, you have to take in more oxygen through breathing.
Another reason why my pulse rate increased was because my body was getting rid of waste gases which are CO2 and H2O that are products of respiration. My respiration rate increased because I was using up lots of energy and I also was producing more carbon dioxide. Therefore I had to increase my oxygen intake and I also had to get rid of the carbon dioxide more quickly. My blood pressure increased because when my heart was pumping faster the amount of blood that was going through my vessels increased which put a strain on her vessels. My temperature increased because of the high amount of heat I produced.
This single metabolic fact accounts for the profound changes in not only respiration, but also in cardiac and circulatory physiology during exercise. Increased oxygen supply is provided by increases in both arterial oxygen delivery and tissue oxygen extraction; at the same time there is increased carbon dioxide transport on the venous side. The need for increased gas exchange by exercising muscles leads to the following general physiologic
|[pic] |[pic] | |When you begin exercise, your muscles undergo change, these are ‘acute responses in the working muscles’. | |These changes are – increased blood flow (to the muscles) | |increased muscle fibre and motor unit recruitment | |increased number and power of muscle contractions | |increased muscle temperature | |Decreased fuel stores (ATP, PC, Glycogen and Triglycerides. | |Increased diffusion of oxygen into the muscle cells. | EXTRA READING………….. |Macmillan |All of the functions performed by the muscular system are performed by 3 types of muscles; smooth,
Case Study Questions: 1.) Explain the renin-angiotensin-aldosterone system. When the kidneys sense decreased profusion pressure, they try to increase this pressure by increasing blood volume through the renin-angiotension-aldosterone system. Once the decreased pressure is sensed renin is released, which increases conversion of angiotension to angiotension I. Angiotension I is in turn converted to angiotension II by the angiontension converting enzyme (ACE). Angiotension II causes vasoconstriction, which raises the blood pressure.
Blood vessels, if constricted, increase SVR and blood pressure while vasodilation decreases SVR and blood pressure. The longer the length of the blood vessel(s), the greater the SVR, therefore, the greater the resistance, the greater the cardiac output and blood pressure must be to overcome the