skeletal muscle contraction

Question 1

what is the primary function of muscles

Answer 1

to generate force or movement in response to a physiological stimulus
all muscles transduce a chemical or electrical signal into a mechanical response

Question 2

how do muscles contract (basic)

Answer 2

the trigger for contraction of all three types of muscle is an increase in intracellular calcium concentration

Question 3

backgroun of skeletal muscle contraction

Answer 3

contracts in response to neuromuscular synaptic transmission
a skeletal muscle cell has a single neuromuscular junction where acetylcholine receptor are concentrated
Ach released from the pre-synaptic nerve terminal binds to nicotinic Ach receptors at the NMJ