UNIT 3 - AOS 2 acute responses

Question 1

What are acute responses?

Answer 1

Is the instant use of the respiratory, cardiovascular and muscular responses. There is an increased demand for oxygen and energy substrates during exercise, and acute responses are activated to meet these needs.

Question 2

What is the cardiovascular system?

Answer 2

The cardiovascular system allows the delivery of many substances around the body, mainly allowing oxygen to reach the working muscles during exercise.

Keynote: Cardio - heart and Vascular - blood vessels & veins.

Question 3

What are the cardio parts of the cardiovascular system?

Answer 3

Heart Rate
Stroke Volume
Cardiac Output

Question 4

What is heart rate?

Answer 4

Number of beats of the heart per minute

Question 5

What is stroke volume?

Answer 5

The volume of blood pumped per beat of the heart

Question 6

What is cardiac output?

Answer 6

Cardiac Output = Stroke Volume x Heart Rate.

The volume of blood pumped by the heart per minute

Question 7

What are the vascular parts of the cardiovascular system?

Answer 7

Venous return
AVO2 difference
Redistribution of blood flow

Question 8

What is the venous return?

Answer 8

The blood returning to the heart via the venous system

Question 9

What is AVO2 difference?

Answer 9

The difference in the concentration of oxygen in the

arterial blood and venous blood.

Question 10

What is the redistribution of blood flow?

Answer 10

Altering the percentage of cardiac output that is distributed to various body sites.

Question 11

What are the acute respiratory responses to exercise?

Answer 11

Respiratory Rate
Tidal volume
Ventilation

Question 12

What is Respiratory Rate?

Answer 12

Number of breaths per minute

Question 13

What is Tidal volume?

Answer 13

The volume of air breathed in per breath

Question 14

What is Ventilation?

Answer 14

V=PR x TV.

The volume of air breathed in per minute

Question 15

What is the muscular system?

Answer 15

Acute responses to the muscular system occur in the actual working muscles and are influenced by factors such as intensity, type and duration of exercise.

Question 16

What are the acute muscular responses to exercise?

Answer 16

Motor Unit Recruitment
Muscle Temperature
Oxygen uptake and consumption (𝐕𝐎𝟐)
Metabolic byproducts
Energy substrates

Question 17

What is Motor Unit Recruitment?

Answer 17

The number and frequency of motor units recruited for

muscle contractions

Question 18

What is Muscle Temperature?

Answer 18

The degree or intensity of heat present in the muscles.

Question 19

What is Oxygen uptake and consumption (𝐕𝐎𝟐)?

Answer 19

The volume of oxygen that can be taken up and used by the

body.

Question 20

What are metabolic byproducts?

Answer 20

Substances leftover from metabolic processes.

Question 21

What are Energy substrates?

Answer 21

Fuel sources required for ATP resynthesis

Question 22

What is Blood Lactate?

Answer 22

There is always blood lactate in the blood. When we work at a higher intensity, blood lactate causes fatigue.

Question 23

What is OBLA (Onset of blood accumulation)?

Answer 23

Is the point when blood lactate begins the accumulate above resting levels, as a result, lactate (clearance) from blood can no longer keep pace with lacate production.

Question 24

What is LIP (lactate inflection point)?

Answer 24

It is the last point before fatigue. The body can still work, but it may cause pain. The lactate inflection point comes later for an anaerobically fitter person.

Question 25

What is VO2 max?

Answer 25

Is the maximum amount of oxygen we can uptake, distribute and utilise.