Key terms Flashcards
Articulating bones
Bones that meet at a joint to enable movement
Backflow
The flowing backwards of blood. Valves in the veins prevent this.
Blood Pressure
The pressure that blood is under. Systolic reading measures the pressure when the heart contracts. Diastolic reading measures the pressure of the blood when the heart relaxes.
Capillaries
A network of microscopic blood cells that are only one cell thick.
Cardiac cycle
One cycle of the diastole and systole is called the cardiac cycle
Cardiac output (q)
The volume of blood ejected from the heart in one minute. Cardiac output (q)= stroke volume (SV) x heart rate (HR)
Cardio-respiratory system
The name used to describe the respiratory system and the cardiovascular system working together.
Deoxygenated blood
Blood containing a low concentration of oxygen
Diastole
The phase of the heartbeat when the chambers of the heart relax and fill with blood
Diffusion pathway
The distance travelled during diffusion
DOMS
Delayed Onset Muscle Soreness
Dorsiflexion
Movement at the ankle joint that flexes the foot upwards and decreases the angle at the ankle joint
EPOC
Excess Post-exercise Oxygen Consumption. The amount of oxygen needed to recover after exercise which leads to increased breathing rate and deeper breathing
Exhalation
The process of breathing out - AKA as expiration
Expiratory Reserve Volume
The amount of air that can be forced out after tidal volume (normal expiration) which decreases during exercise
Extension
Increase in the angle of bones at a joint
Fatigue
Physical fatigue is a feeling if extreme or severe tiredness due to a build up of lactic acid in the muscles or working for a long time
Flexion
Decrease in the angle of bones at a joint
Gaseous Exchange
The process where oxygen from the air in the alveoli moves into the blood in capillaries while carbon dioxide moves from the blood in the capillaries into the air in the alveoli
Haemoglobin
The protein found in red blood cells that transports oxygen (as oxyhaemoglobin) and carbon dioxide around the body
Heart Rate
The number of times your heart beats in a minute. One heartbeat is one contraction and one relaxation of the heart. Heart rate is measured in (bpm)
Hypertrophy
The enlargement of an organ or tissue caused by an increase in the size of its cells. When a muscle is trained, small tears are created. As they heal, they become thicker and increase in size
Inhalation
The process of breathing in also know as inspiration
Inspiration
The process of breathing also known as inhalation
Inspiratory reserve volume
The amount of air that can be forced in after tidal volume (after a normal inspiration). Inspiratory reserve volume decreases during exercise
Intensity
The amount of energy needed to complete an activity. Working at high intensity requires a large amount of energy. Working at a low intensity requires less energy
Isometric contraction
A muscle contraction where the length of the muscle does not change when it contracts
Isotonic contraction
A muscle contraction where the muscle changes length when it contracts, resulting in limb movement. Isotonic contractions can be concentric (when the muscle contracts and shortens) or eccentric (when the muscle contracts and lengthens