Pe Flashcards
What are the different functions of the skeleton?
Support
Protection
Movement
Making blood cells
Mineral storage
What are the three types of bones in the body?
Long bones
Short bones
Flat bones
What are long bones used for?
Gross movement
What are short bones used for?
Fine movement
What are flat bones used for?
Protect internal organs
Allow muscle attachment
Which bones are long bones?
Humerus
Ulna and radius
Femur
Fibula and tibia
Which bones are flat bones?
Cranium
Sternum and ribs
Scapula
Pelvis
Which bones are short bones?
Talus
What other bones are there?
Vertebral column
Patella
What is a joint?
Any point where two or more bones meet
What are the bones which meet at a joint called?
Articulating bones
What bones meet at the hip joint?
Pelvis and femur
What bones meet at the shoulder joint?
Humerus and scapula
What bones meet at the knee joint?
Femur and tibia
What bones meet at the ankle joint?
Tibia, fibula and talus
What bones meet at the elbow joint?
Humerus, radius and ulna
What is flexion at a joint?
The closing of a joint
What is extension at a joint?
The opening of a joint
What is adduction at a joint?
The moving of a limb towards the midline of the body
What is abduction at a joint?
The moving of a limb away from the midline of the body
What is rotation at a joint?
The clockwise or anticlockwise movement of a limb
What is circumduction at a joint?
The movement of a limb, hand or foot in a circular motion
What is plantar flexion at a joint?
Extension at the ankle joint
What is dorsiflexion at a joint?
Flexion at the ankle joint
What are the two types of joint?
Ball and socket
Hinge
What types of movements can be done at a ball and socket joint?
All types
What types of movements can be done at a hinge joint?
Just flexion and extension
Which joints are ball and socket?
Hip joint
Shoulder joint
Which joints are hinge?
Knee
Ankle
Elbow
What are the three types of connective tissue?
Ligaments
Tendons
Cartilage
What is the job of ligaments?
Connect bone to bone
What is the job of tendons?
Attach muscle to bone
What is the job of cartilage?
Acts as a cushion between bones
What types of joints are synovial joints?
Hinge joints and ball and socket joints
What is a synovial joint?
A joint which allows a wide range of movement and has a joint capsule enclosing and supporting it
What are synovial joints held together by?
Ligaments
What does the synovial membrane do?
Releases synovial fluid into joint capsule to lubricate it
What does the bursae do?
Reduce friction between bones and tissue
What movement do biceps allow for?
Flexion at the elbow
What movement do triceps allow for?
Extension at the elbow
What movement do pectorals allow for?
Adduction and flexion at the shoulder
What movement do hip flexors allow for?
Flexion at the hip
What movement do the gluteals allow for?
Extension, rotation and adduction at the hip
What movement do the deltoids allow for?
Flexion, extension, abduction or circumduction at the shoulder
What movement do the latissimus dorsi allow for?
Extension, adduction or rotation at the shoulder
What movement does the tibialis anterior allow for?
Dorsiflexion at the ankle
What movement do the rotator cuffs allow for?
Rotation and abduction at the shoulder
What movement do the abdominals allow for?
Flexion at the waist
What movement do the gastrocnemius allow for?
Plantar flexion at the ankle
What movement do the quadriceps allow for?
Extension at the knee
What movement do the hamstrings allow for?
Flexion at the knee
What are the two types of muscle contractions?
Isometric
Isotonic
What happens in an isometric contraction?
The muscle stays the same length
What happens in an isotonic contraction?
The muscle changes length so something moves
What are the two types of isotonic contractions?
Concentric
Eccentric
What happens in a concentric contraction?
The muscle contracts and shortens
What happens in an eccentric contraction?
The muscle contracts and lengthens
What are antagonistic muscles?
Pairs of muscles which work against each other
What are the different movement of muscles in an antagonist pair called?
Contracting muscle - agonist or prime mover
Relaxing muscle - antagonist
What are the three types of blood vessels?
Arteries
Veins
Capillaries
Where do arteries carry blood?
Away from the heart
Where do veins carry blood?
Towards the heart
Where do capillaries carry blood?
To exchange gases and nutrients
How does air pass through the respiratory system?
Trachea to bronchi to bronchioles to alveoli
What happens to the diaphragm and external intercostal muscles as you breathe in?
Contract to move the rib cage upwards and expand chest cavity
What happens to the diaphragm and external intercostal muscles as you breathe out?
Relax moving the rib cage down and shrinking the chest cavity
What two gases are exchanged in the alveoli?
Oxygen
Carbon dioxide
What is of a high concentration and what has a low concentration in the alveoli before diffusion?
High concentration of oxygen
Low concentration of carbon dioxide
What is of high concentration and what is of low concentration in the capillaries before diffusion?
High concentration of carbon dioxide
Low concentration of oxygen
What is used to measure the amount of air in your lungs?
A spirometer
What is your tidal volume?
The amount of air you breathe in or out in one breath
What is your inspiratory reserve volume?
The extra volume of air you can breathe in after a normal breath in
What is your expiratory reserve volume?
The extra air you can breathe out after a normal breath out
What is your residual volume?
The air left in your lungs after you have breathed out as much as you can
What does a spirometer trace show?
Lung air volumes
What type of exercise would you use aerobic respiration?
When exercise is not too fast but steady
What type of exercise would you use anaerobic respiration?
When exercise is short and at high intensity
At what type of exercise are carbohydrates used as fuel?
Aerobic exercise at moderate intensity and anaerobic exercise at high intensity
When are fats used as the body’s fuel?
Aerobic exercise at low intensity
What are the short term effects of exercise on the muscles?
Produce lactic acid causes muscle fatigue
What are the short term effects of exercise on the respiratory system?
Increased breathing rate
Increased depth of breath
What are the short term effects of exercise on the cardiovascular system?
Heart rate and stroke volume increase
Increased blood pressure
What is heart rate?
The number of times your heart beats per minute
What is stroke volume?
The amount of blood pumped with each contraction
What is cardiac output?
The amount of blood pumped by the ventricle per minute
How is cardiac output calculated?
Heart rate x stroke volume
What is vasodilation?
The widening of the blood vessels to let more blood flow through
What is vasoconstriction?
The narrowing of the blood vessels to reduce the amount of blood flowing through
What are the long term effects of exercise on the musculoskeletal system?
Make muscles thicker and reduce body weight this increases your strength
Stronger ligaments and tendons reduces injury risk
Improve speed
What are the long term effects of exercise on the cardio-respiratory system?
Bigger stronger heart which has an increased cardiac output
Increased cardiovascular endurance
What is a lever arm?
The bone of body part being moved about a point
What is the fulcrum?
The joint where the lever arm pivots
What is the effort?
The force applied by the muscles to the lever arm
What is the resistance?
The thing acting against the pull of the muscles on the lever arm
What are the three types of lever system?
First class
Second class
Third class
What does a first class lever system look like?
The load and effort are at opposite ends with the fulcrum in the middle
What does a second class lever system look like?
The fulcrum and effort are at opposite ends and the load is in the middle
What does a third class lever system look like?
The fulcrum and load are at opposite ends with the effort in the middle
What does the mechanical advantage of a lever measure?
How efficient it is at moving heavy loads
Formula for mechanical advantage
Mechanical advantage= effort arm / weight arm
What lever system has a high mechanical advantage?
Second class
What lever system has a low mechanical advantage?
Third class
Which lever system can have both high and low mechanical advantage?
First class
What is a plane?
An imaginary flat surface which runs through the body
What are planes used for?
Describe the direction of movement
What are the three types of plane?
Sagittal
Transverse
Frontal
How does the sagittal plane divide the body?
Into left and right sides
How does the transverse plane divide the body?
From top to bottom
How does the frontal plane divide the body?
Front and back
What is an axis?
A imaginary line which runs through the body
What are the three types of axis?
Sagittal
Transverse
Longitudinal
How does the sagittal axis run through the body?
From front to back
How does the transverse axis run through the body?
Left to right
How does the longitudinal axis run through the body?
Top to bottom