Pe Exam Revision Flashcards
Blood vessels, order and description
Arteries, arterioles, capillaries, venules, veins
Systemic systems, order
Left ventricle pumps oxygenated blood into the aorta. Blood travels to arterioles and capillaries.
Pulmonary systems, order
Starts with vena cava bringing deoxygenated blood back to the heart. Blood flows from right atrium to the right ventricle through pulmonary artery.
What is gas exchange?
Oxygen is moved into the bloodstream and then into the cells. Oxygen is exchanged for waste by the alveoli which travels through the lungs and is exhaled
Mechanics inspiration
When lungs inhale, the diaphragm contracts and pulls downward. Simultaneously, the muscles in the ribs contract and pull upward
Mechanics expiration
When the lungs exhale, the diaphragm contracts and pulls upward. The muscles contract and pull downward.
Minute ventilation
The volume of air that we inhale and then exhale over the course of one minute
V02 max
The largest volume of oxygen that the body can take and transport
EPOC
Excess post-exercise oxygen consumption
Steady state
When the demand of oxygen meets the amount of oxygen supplied
Oxygen deficit
When the demand for oxygen is greater than the supply of oxygen
Stroke volume
The volume of blood pumped out of the left ventricle during each systolic contraction.
Tidal volume
The volume of air that we inhale and then exhale in one breath
Vasodilation
Widening of blood vessels
Transport oxygen and nutrients
Vasoconstriction
Contracting of blood vessels
Removes waste
Acute injuries
Occurs suddenly with little or no notice
Chronic injuries
Associated with overuse of body over time
Arteriovenous oxygen difference
Blood travels to working muscles in arteries, arteries become capillaries,
Oxygen is removed from the capillaries by myoglobin in the muscles to create ATP
How is blood distributed around the body during exercise?
More blood is prioritised to go to the working muscles by the cardio respiratory system and less to other, non-working muscles
What does EPO do?
Stimulates red blood cell growth
Synthetic version is available, but it is banned
Function of alveoli
They are found at the end of the bronchioles and help with gas exchange in the lungs and the blood.
How do you calculate ventilation
respiratory rate x tidal volume