Paper 1: Fitness and Body Systems Flashcards
What are the 5 Functions of the Skeletal System?
Protection
Muscle attachment
Movement
Blood cell production#
Mineral storage
What are the 4 Classifications of Bones?
Long
Short
Flat
Irregular
What is a Pivot Joint?
Found at the top of the neck
What is a Hinge Joint?
Found at the elbow and knee
What is a Ball and Socket Joint?
Found at the shoulder and hip
What is a Condyloid Joint?
Found at the wrist
What is Flexion?
The angle at the joint is decreased, flexion can be seen as bending
What is Extension?
The angle at the joint increases, it is as straightening
What is Abduction?
When a limb is moved away from the midline of the body
What is Adduction?
When a limb is moved towards the midline of the body
What is Rotation?
When a limb moves in a circular motion around a fixed joint
What is Circumduction?
Where a limb moves in a circle
What is Plantar Flexion?
When toes are pointed away from the shin at the ankle
What is Dorsiflexion?
When toes are raised towards the shin
What are Ligaments?
Connect bone to bone
What are Tendons?
Attach muscle to bone
What are the 3 Types of Muscle?
Cardiac
Voluntary
Involuntary
What is Vascular Shunting?
A process where the redistribution of blood occurs and blood flow increases to active areas from inactive areas
What is Vasodilation?
The widening of the lumen to increase blood flow
What is Vasoconstriction?
The narrowing of the lumen to decrease blood flow
What is an Antagonistic Pair?
A pair of muscles that work together to produce movement
What is an Agonist?
The muscle within the pair that is working, contracting and shortening to pull the bone
What is an Antagonist?
The muscle within the pair that is relaxing and shortening
What are Type 1 Muscle Fibres?
Known as slow twitch fibres and are suited for low intensity exercise such as a marathon as they can be used for a long time without fatiguing
What are Type 11x Muscle Fibres?
Known as fast twitch fibres, they are used for anaerobic work and can generate a greater force than other fibre types but they fatigue quickly
What are Type 11a Muscle Fibres?
Known as fast twitch fibres, they are suited to lengthy anaerobic work such as an 800m race and can be improved through endurance training to increase their resistance to fatigue
What are 4 Functions of the CV System?
Transport, clotting, temperature regulation, protection
What are Arteries?
Blood vessels that carry oxygenated blood from the heart to muscles and organs
What are Veins?
Blood vessels that carry deoxygenated blood from muscles and organs to the heart and they contain valves to prevent backflow of blood
What are Capillaries?
Blood vessels that wrap around muscles and organs so that gaseous exchange can take place and are one cell thick
What are Components of Blood?
RBC
WBC
Plasma
Platelets
What is Gaseous Exchange?
Oxygen moves from air in the alveoli into the blood in the capillaries, while carbon dioxide moves from the blood in the capillaries into the air in the alveoli
What is Aerobic Exercise?
glucose + oxygen = energy + carbon dioxide + water
What is Anaerobic Exercise?
glucose = energy + lactic acid
What is Lactic Acid?
It is a byproduct of anaerobic exercise which leads to muscle fatigue
What is Stroke Volume?
The amount of blood pumped out of the heart per beat
What is Heart Rate?
The number of beats per minute
What is Cardiac Output?
The volume of blood pumped out of the heart per minute
What is Tidal Volume?
The amount of air inhaled and exhaled per breath
What is Frequency in the Respiratory System?
The number of breaths taken per minute
What is Minute Ventilation?
The amount of air inhaled and exhaled per minute
What is Vital Capacity?
The maximum amount of exhaled air following a maximum inhalation
What is a Lever?
A rigid bar or object that moves around a fixed fulcrum
What is a Fulcrum?
A fixed pivot point, a joint in the body
What is Effort?
The source of energy, the muscle in the body
What is a Load?
The weight/resistance to be moved
What is the Load Arm?
The distance from the load to the fulcrum
What is the Effort Arm?
The distance from the effort to the fulcrum
What is Mechanical Advantage?
When a lever’s effort arm is longer than its load arm. The load can be moved with a relatively small amount of effort (2nd class lever)
What is Mechanical Disadvantage?
When a levers load arm is longer than its effort arm. It has low load force to effort ratio