Unit 3 AOS 2a Flashcards
Acute Responses
A short term physiological change to help meet the energy demands of exercise.
3 types of acute responses
Respiratory, Cardiovascular and Muscular.
Respiratory System
The lunges and airways responsible for taking in oxygen and expelling carbon dioxide.
Respiratory responses to exercise
- Increased respiratory rate
- increased tidal volume
- increased ventilation
- increased activation of alveoli/pulmonary diffusion
respiratory rate (RR)
number of breaths per min
tidal volume (TV)
volume of air breathed in per breath
ventilation (v)
volume of air breathed in per min. V=RR times TV
pulmonary diffusion
the transfer of oxygen from the alveoli (lungs) to the capillaries (blood)
Aim of acute respiratory responses
To increase oxygen intake at the lungs which is then transferred to the working muscles.
Cardiovascular system
Is the system that moves oxygen throughout the body by using blood.
Acute cardiovascular responses to exercise
- Increased Heart Rate
- increased cardiac output
- redistribution of blood flow
- increased venous return
- decreased blood volume
- increased stroke volume
- increased systolic blood pressure
- increased avo2 difference
Heart Rate (HR)
number of beats of the heart in a min
Stoke Volume (SV)
Volume of blood pumped from the left ventricle of the heart per beat
cardiac output (Q)
volume of blood pumped from the left ventricle per min. HR times SV=Q
Systolic Blood Pressure
the pressure exerted by the blood against the arterial walls when the heart contracts
