skeletal muscle

Question 1

organisation of skeletal muscle - largest to smallest

Answer 1

muscle, muscle fascicle, muscle fibre, myofibril, sarcomere, myofilament.

Question 2

What are the three connective tissue sheaths in skeletal muscle, and what do they cover?

Answer 2

• Endomysium: surrounds each muscle fibre
• Perimysium: surrounds each fascicle
• Epimysium: covers the whole muscle.

Question 3

what is the functional unit of muscle

Answer 3

The functional unit of muscle is a ‘motor unit’

Question 4

what are the 3 types of muscle contraction

Answer 4

• Concentric: shortening
• Eccentric: lengthens
• Isometric: does not change

Question 5

what are the 4 roles that muscles can play during movement?

Answer 5

• Agonist (Prime Mover): Main muscle driving movement (e.g., elbow flexor).
• Antagonist: Opposes movement, lengthens to allow motion (e.g., elbow extensor).
• Synergist: Assists prime mover or stabilizes related joints (e.g., shoulder & elbow).
• Fixator: Stabilizes one body part while another moves.

Question 6

what is skeletal muscles
control
location
function
cell shape
nucleus location and number
striations (Y/n)
branching (Y/n)

Answer 6

voluntary
attached to the bones of the skeleton via tendons
produce movement of the skeleton
cylindrical
many peripheral nuclei
yes
no