Muscular System

Question 1

structure of a muscle

Answer 1

muscle-muscle fibre bundle-muscle fibre-myofibril-myofilament

Question 2

myosin

Answer 2

thick filament

Question 3

actin

Answer 3

thin filament

Question 4

sliding filament model

Answer 4

myosin attaches its head to actin and relaxes, with ATP, and flexes dragging actin which is attached to Z lines. When Z lines meet each other the whole muscle contracts.

Question 5

Troponin

Answer 5

protein attached to tropomyosin

Question 6

Tropomyosin

Answer 6

protein that blocks attachment site for myosin head

Question 7

Calcium relationship with muscle contraction

Answer 7

binds to troponin to move tropomyosin

Question 8

what’s a single muscle contraction called

Answer 8

muscle twitch

Question 9

fast twitch muscles

Answer 9

light in colour, little myoglobin,depend on anaerobic contraction, rapid contraction{generation of power}. eye muscle

Question 10

slow twitch muscle

Answer 10

contract slowly but resist fatigue, high amount of myoglobin, lots of mitochondria. deep leg muscle