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
6. Describe how frequency of sEMG spikes changed with increasing muscle load. The frequency of sEMG spikes started increasing as the muscle load increased until it reached it's optimal point at a 5 lb threshold and then started to slowly decreased thereafter. 7. Based on changes in amplitude and frequency of sEMG, did motor unit activation increase, decrease, or stay the same with increasing muscle load?
The heart needs to pump faster or harder to complete this job. During a 400m race, this would enhance performance by removing unnecessary waste products from the muscles and supplying more oxygen to the muscles. Increase Stroke Volume and Cardiac Output Stroke volume is the amount of blood pumped out of one ventricle with each beat. Cardiac output is the amount of blood pumped out of the heart every minute. It is calculated by stroke volume x heart rate.
increase See Table 3: Lung Capacities and Minute Ventilation See Graph: Comparison of Resting and Exercising Lung Capacities and Minute Ventilation DISCUSSION 1. Explain the change in ERV with exercise. TV increases with exercise so the ERV decreases too. 2. Explain the change in IRV with exercise.
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.
There is also an increase in the synovial fluid at the joint. The short term effects of exercise on your muscle may result in the joints become less viscous because the fluid allows a larger range of movement and pliability. The musculoskeletal response has an effect on the flexibility of the muscles during and after exercise. During exercise I got 18 cm in the sit and reach test and post exercise was 17 cm this shows that exercise has an effect on muscle pliability during acute exercise. Muscle fibre micro tears During exercise your muscles are put under stress due to constant contractions this stress can then lead to tears in the muscle fibres, if the body has the correct nutrients during recovery periods the muscle can then repair itself and become stronger this can lead to a increase in muscular endurance.
|[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,
Introduction: The purpose of this lab is to identify the significant differences between heart rates and blood pressures based on an individual’s sex, lifestyle and physical activity during a given period of time. Hypothesis: In response to the different levels of activity I feel the more active a person is their pulse and BP will increase. I also feel that based on their lifestyles, someone with a more active or athletic lifestyle would have a less significant change in their vitals as opposed to someone who is less active and even more so with a smoker. Materials: Blood pressure cuffs, stethoscopes, the BP pulse and MAP chart provided, 4 individuals that fit the specified profiles, timer/clock/stopwatch. Procedure: To obtain comparable
Unit 2: The Physiology of Fitness Assignment: No 1 Task 1.a Task1b Musculoskeletal response Increased blood supply The short term effects of exercise on your muscles include an increase in temperature and metabolic activity. Result: - greater demand for oxygen in blood supply through capillary dilation. Increase in muscle pliability When you warm up your muscles during activity makes them more pliable and reduces the risk of injury. Increased range of movement The short-term effect of exercise are demonstrated by changes within the joint. Movement of joints stimulates the secretion of synovial fluid.
* Mechanism of action: synthetic catecholamine with primarily beta1-adrenergic activity, acting as an inotropic vasopressor. Increases myocardial contractility, cardiac index, oxygen delivery, and oxygen consumption and increases cardiac output. Effects are variable due to differences in metabolism and renal excretion. * Expected outcome: increased systemic blood pressure and improved perfusion, especially related to myocardial dysfunction. Epinephrine * Begin continuous infusion of Epinephrine at 0.1mcg/kg/minute to infuse via