Skeletons and Muscle (2)

Question 1

what are the 3 major types of muscle ?

Answer 1

1. Skeletal Muscle
2. Cardial uscle
3. Smooth Muscle

Question 1

what are the main functions of the muscular system ?

Answer 1

1. movement (skeletal muscles responsile for locomotion)
2. Posture (important in keeping body in puroght position)

Question 1

what are stabilizing joints ?

Answer 1

• muscle that pull bones into correct position to hold joint in a stable postition, which mantains joint health, defence from Arthritis

Question 1

generating heat

what is the function of the muscular system ?

Answer 1

• ATP is used to power muscle contractions but energy is lost as heat
• heat is used to mantain normal body temperature thefore muscle is important

Question 1

generating heat

what is the function of the muscular system ?

Answer 1

• ATP is used to power muscle contractions but energy is lost as heat
• heat is used to mantain normal body temperature thefore muscle is important

Question 2

what are the name of the muscles in the upper limb ?

Answer 2

1. deitoid
2. pectoralis major
3. biceps branchii
4. branchioradialis
5. flexor carpi
6. extensor carpi

Question 3

what are the muscle of the upper leg ?

not on exam !!

Answer 3

1. Vastus lateralis
2. Vastus Medialis
3. Vastus Intermedius
4. Rectus Femoris

Question 4

what are the muscles in the lower leg ?

not on examssss!!!

Answer 4

• Tibialis anterior
• Fibularis longus
• Extensor digitorum longus
• Fibularies brevis

Question 5

what is an origin ?

Answer 5

the anchor of muscle and is attched to the less movable bone or piece of connectiv tissue

Question 6

what is isertion?

Answer 6

this is attached to the movable bone/connective tissue

Question 7

what happens to the isertion and origin during muscle contraction ?

Answer 7

the insertion moves towards the origin

Question 8

what are the different movements thata muscle can do ?

Answer 8

1. flexion
2. extention
3. rotation
4. abduction
5. adduction

Question 8

what are the different movements thata muscle can do ?

Answer 8

1. flexion
2. extention
3. rotation
4. abduction
5. adduction

ON EXAM !!!

Question 9

what is flexion ?

ON EXAM !!!

Answer 9

decreases the angle of the joint so the attached bones are brought closer together

Question 10

what is extention ?

ON EXAM !!!

Answer 10

increases angle of joint and bones are pushed further apart (oppostive of felxion)

Question 11

what is rotation ?

ON EXAM !!!

Answer 11

movement of bone around longitudinal axis

Question 12

what is abduction ?

ON EXAM !!!

Answer 12

movement of a limb away from midline

Question 13

what is adduction ?

ON EXAM !!!

Answer 13

movement of limb towards midline

Question 14

what are the special functions of SKELETAL muscle fibres ?

ON EXAM !!!

Answer 14

1. responsiveness- muscle fibres can receive and respond to stimuli for. nerves
2. contractility (motor neurons)- can shorten when stimulated
3. extensibility- they can stretch
4. elesticity- thye can recoil after stretching and return to the “resting” lenght

Question 15

jouney of a nerve impulse

Answer 15

1. nerve impulse reaches axon terminal of motor neuron
2. calcium channel open and alloe calcium into the axon terminal
3. calcium stimulates synaptic vescicles to release Acetylcholine
4. Acetylcholine opens ion channels in muscle fibre allowing sodium ions into fibre and potassium ions out
5. sodium diffuses down a muscle fibre cell creating an action potential

Question 16

whta does quadroceps mean ?

Answer 16

• 4 headed
• containes 4 muscles

Question 17

what is a gastrocnemius ?

Answer 17

calf muscle of the leg

Question 18

Each individual muscle is anchored in at least…….

Answer 18

2 points to either bone or connective tissue