12PE | 3.2 - Acute Responses, Fatigue & Recovery

An acute response to exercise of the muscular system is...

• Increase in muscular substrate levels

• Decrease in muscular substrate levels

• Increase in AVO2-diff

• Increase in heart rate

An acute response of the cardiovascular system is...

• Increase enzyme activity

• Decrease muscle temperature

• Redistribution of blood flow to muscles

• Increase pulmonary diffusion

An acute response to exercise of the respiratory system is...

• Increase cardiac output

• Increase pulmonary diffusion

• Increase enzyme activity

• Increase muscle substrate levels

What causes our muscle temperature to increase as we exercise?

• A by-product of the ATP-PC energy system to produce energy

• A by-product of the aerobic glycolysis process to produce energy

• Because our blood vessels vasodilate as we exercise

After 30 minutes of a game, you may be fatigued. Which energy system will have to increase its contribution of energy if you are trying to sprint at maximal intensity after 30mins of exercise?

• ATP-PC

• Anaerobic glycolysis

• Aerobic energy system

STROKE VOLUME IS...

• The amount of blood ejected by the left ventricle per beat. 
• The amount of blood pumped out of the heart in one minute
• The number of times the heart beats in one minute.
• The blood returning to the heart via the inferior and superior vena cava. 

CARDIAC OUTPUT IS...

• The number of times the heart beats in one minute.
• The amount of blood ejected by the left ventricle per beat. 
• The amount of blood pumped out of the heart in one minute
• Pressure in the arteries following contraction of ventricles as blood is pumped out of the heart. 

SYSTOLIC BLOOD PRESSURE IS...

• During aerobic exercise, blood volume decreases. Plasma volume decreases rapidly in the first 5 minutes of exercise then stabilises. 
•  Pressure in the arteries when the heart relaxes and ventricles fill with blood.
• Pressure in the arteries following contraction of ventricles as blood is pumped out of the heart. 
• The number of times the heart beats in one minute.

HEART RATE IS...

• During exercise, blood flow is redirected away from the spleen, kidneys, guts and inactive muscles so that working muscles receive a greater % of Q.
• The number of times the heart beats in one minute.
• The blood returning to the heart via the inferior and superior vena cava. 

REDISTRIBUTION OF BLOOD FLOW IS...

• During exercise, blood flow is redirected away from the spleen, kidneys and guts so that working muscles receive a greater % of blood.

• Pressure in the arteries following contraction of ventricles as blood is pumped out of the heart.

• During aerobic exercise, blood volume decreases. Plasma volume decreases rapidly in the first 5 minutes of exercise then stabilises.