sacromere arrangement

Question 1

what bands make up sarcomere

Answer 1

I band: Made up of actin filaments

A band: Made up of myosin and actin filaments

H band: made up of Myosin filaments

Question 2

what makes up sarcomere

Answer 2

actin filaments, stay still, myosin filaments are moving, cross bridges are formed between these and can only happen with calcium and

Question 3

how does the sarcomere work?

Answer 3

when muscles contract actin and myosin filaments come up to the H zone until it dissappears, calcium is needed for this

Question 4

neuromuscular junction

Answer 4

a nerve impulse to the muscle, actin, myosin and calcium attach to each other to pull the muscle together

Question 5

Intititaion of a muscle

Answer 5

nerve creates message
impulse goes to spinal cord to motor neurons
message goes to motor neurons
message goes to muscle fibre controlled by neuron and travels to neuromusclar juntion

Question 6

fast motor

Answer 6

fatigue quick, contract quick

Question 7

slow motor

Answer 7

fatigues slow, slow contractions

Question 8

what affects motor units ?

Answer 8

joint angle, force produced

Question 9

all or nothing principal

Answer 9

of a nerve impulse is too weak nothing will happen due to a threshold