Paper 1 Definitions Flashcards
Aerobic exercise
Use of oxygen for the duration of the exercise. Usually at moderate intensity at a continuous rate e.g. long distance running.
Anaerobic exercise
Exercise which does not allow for the predominant usage of oxygen. Usually high or very high intensity for a short period of time. E.g. sprinting up a hill.
Blood vessels
Tubular structures that carry blood around our bodies.
Breathing rate
The number of breaths taken in a minute.
Capilliarisation
The development of blood capillaries in the body which increases through long term effects of exercise.
Cardiac output
The volume of blood pumped per minute by each ventricle of the heart. Cardiac output = stroke volume x heart rate.
Double circulatory system
The human body has two circulatory loops in which blood circulates. One is oxygenated, and the other is deoxygenated. Systemic – the circulatory loop that controls blood flow from the heart to the rest of the working muscles and organs. Pulmonary - the circulatory loop that controls blood flow from the heart to the lungs.
Gas exchange
The movement of gases taking place at the alveoli and capillaries.
Heart rate
Number of heart beats per minute.
Minute ventilation
The volume of gas inhaled or exhaled from the lungs per minute.
Red blood cells
Oxygen carrying cells containing haemoglobin.
Redistribution of blood flow
When you exercise the blood is diverted from inactive areas to the muscles that are being used. This action is completed through vasodilation and vasoconstriction Also known as the vascular shunt mechanism.
Stroke volume
The amount of blood pumped out of the heart (left ventricle - to the body) during each contraction.
Tidal volume
The amount of air which enters the lungs during normal inhalation at rest.
Cool down
The act of allowing physiological activity to return to normal gradually after strenuous exercise by engaging in less strenuous exercise.
Fatigue
Muscle tiredness when the body has a lack of energy.
Hypertrophy
The increase in size of skeletal or cardiac muscle.
Lactic acid
A waste product produced in the muscle tissues during strenuous exercise where the anaerobic energy system is in use.
Rate of recovery
The speed at which the body returns back to normal after exercise.
Warm up
Preparatory exercises done to prepare the body and mind for physical activity.
1st Class Lever
1st Class: A lever in which the fulcrum is positioned between the load and the effort.
2nd Class Lever
2nd Class: A class 2 lever has the load and the effort on the same side of the fulcrum, with the load nearer the fulcrum.
3rd Class Lever
3rd Class: The effort is placed between the load and the fulcrum, and the effort must travel a shorter distance and be greater than the load.
Axes
A line around which the body can turn.