7.1.1 - Movement Of The Skeleton Flashcards
What Are Muscles Described As?
Effectors.
What Are Muscles Stimulated By?
Nerve impulses from motor neurones.
What Are Tendons?
(4 Points)
~ Connect muscle to bone.
~ Strong connective tissue.
~ Non-elastic.
~ Flexible, doesn’t stretch when a muscle is contracting.
What Are Ligaments?
(4 Points)
~ Attach bone to bone.
~ Strong connective tissue.
~ Strong elastic fibres.
~ Help to stabilise and strengthen joints.
Describe The Skeletal Muscle
(4 Points)
~ Helps you to move.
~ Contract voluntarily, so movement can be controlled.
~ Contains lots of different structural proteins that are contractile such as actin and myosin.
~ Made up of muscle fibres.
What Are The Functions Of The Skeletal Muscle?
(6 Points)
~ Protects internal organs.
~ Store and release fat.
~ Produce blood cells.
~ Stores and releases minerals.
~ Facilitates movement.
~ Supports the body.
What Is The Bone Mainly Composed Of?
Calcium phosphate.
What Is The Cartilage?
(3 Points)
~ Helps to reduce wear and tear on the bones.
~ Compressible to absorb shocks from high impacts.
~ Surrounded by fluid for lubrication, reducing friction between bones.
What Are Joints?
(2 Points)
~ The area where bones are attached to move body parts.
~ Made of fibrous connective tissue and cartilage.
What Are Muscles Only Capable Of?
(2 Points)
~ Contracting / pulling, which is why they work in pairs.
~ They cannot push.
What Are Antagonistic Muscle Pairs?
(2 Points)
~ When a muscle pulls in one direction the other muscle pulls in the opposite direction.
~ In each muscle pair there is a flexor and an extensor.
What Is A Flexor Muscle?
(2 Points)
~ Bends a joint during contraction.
~ Decreases the angle between the two bones.
What Is An Extensor Muscle?
(2 Points)
~ Straightens a joint during contraction.
~ Increases the angle between the two bones.
