7.3 Peak performance Flashcards
What is aerobic capacity?
The ability for the body to take in, transport and use oxygen
what is VO2 max?
The maximum volume of oxygen per minute consumed and used by a person
What is cardiac output?
Volume of blood pumped by the heart in a minute
What is stroke volume?
The volume of blood ejected from the left ventricle
what is the equation for cardiac output?
Stroke volume x heart rate
The heart muscle is said to be what
Myogenic
what is the journey of impulses in the heart?
SAN - atria - AVN - bundle of His - purkinje fibres
what can be used to detect the electrical activity of the heart?
An electrocardiogram
on an ECG, what does the P wave show?
The depolarisation of the atria leading to atrial contraction
on an ECG, what does the PR interval show?
The time taken for impulses to be conducted from the SAN across the atria to the ventricles through the AVN
On an ECG, which is the QRS complex show
The wave of depolarisation resulting contraction of the ventricles
on an ECG, what does the T wave show?
Repolarisation of the ventricles during the heart relaxation phase
what does bradycardia mean?
The heart rate is slow
what does tachycardia mean?
The heart rate is fast
what does atrial fibrillation mean?
The heartbeat is a regular
What part of the body controls heart rate?
The cardiovascular control centre located in the medulla oblongata
What are the two nerves that are between the cardiovascular control centre and the heart and what do they do?
The sympathetic nerve is the accelerator and the parasympathetic nerve/vagus nerve is a decelerator
what is tidal volume?
The volume breathed in and out at each breath
what is vital capacity?
The maximum volume of air that can be inhaled and exhaled
what can be used to measure tidal volume and vital capacity?
A spirometer
what is minute ventilation?
The volume of air taken into the lungs in one minute
what is the equation for minute ventilation?
Tidal volume x number of breaths
