Muscle physiology 1

Question 1

functions of skeletal muscle

Answer 1

Maintenance of posture

Purposeful movement in relation to external environment

Respiratory movements

Heat production

Contribution to whole body metabolism

Question 2

types of muscle

Answer 2

skeletal
cardiac
smooth

Question 3

striated muscles

Answer 3

skeletal and cardiac

Question 4

unstriatedd muscles

Answer 4

smooth

Question 5

striations

Answer 5

dark bands - myocin
light bands- actin

Question 6

what are skeletal muscles innervated by and their control

Answer 6

somatic nervous system
voluntary control

Question 7

what are cardiac and smooth muscles innervated by

Answer 7

autonomic

Question 8

what are skeletal muscle fibres organised into

Answer 8

motor units; single alpha motor neuron and all the skeletal muscle fibres it innervates

Question 9

which have fewer fibres per motor unit

Answer 9

muscles which serve fine movements; eye, facial expression

Question 10

how are skeletal muscles attached to the skeleton

Answer 10

by tendons

Question 11

what do skeletal muscles consist of

Answer 11

muscle fibres

Question 12

what do muscle fibres contain

Answer 12

myofibrils

Question 13

what are actin and myocin arranged inti

Answer 13

sarcomeres

Question 14

functional units of muscle

Answer 14

sarcomeres

Question 15

functional unit of an organ

Answer 15

the smallest component capable of performing all the functions of that organ

Question 16

how is muscle tension produced

Answer 16

sliding of actin on myocin

Question 17

what is required to switch on cross bridge formation

Answer 17

ca++

Question 18

what is required for both contraction and relaxation

Answer 18

atp

Question 19

when is ca2+ released from lateral sacs of sarcoplasmic reticulum

Answer 19

when the sirface action potential spreads down the transverse t-tubules

Question 20

what is the transmitter at the neuromuscular junction

Answer 20

ach