Unit 7 Muscle

Question 1

Name 3 types of muscle

Answer 1

skeletal
cardiac
smooth

Question 2

Is skeletal muscle voluntary or involuntary

Answer 2

voluntary most of the time except for muscle reflexes

Question 3

Where is cardiac muscle found

Answer 3

heart

Question 4

where is smooth muscle found

Answer 4

walls of hollow internal organs
digestive organs
uterus
urinary bladder

Question 5

muscle fibers are grouped into bundles called

Answer 5

/ˈfasək(ə)l/ fascicles

Question 6

what are the 3 stages of a muscle twitch

Answer 6

latent period
contraction period
relaxation period

Question 7

what is the name of the muscle that does the majority of the work

Answer 7

prime mover or agonist

Question 8

what is the function of the masseter

Answer 8

closes jaw

Question 9

what is the function of the deltoid

Answer 9

abducts arm to horizontal

Question 10

how do muscles help with breathing

Answer 10

contraction raises and lowers the ribcage and the diaphragm

Question 11

what is a myofibril

Answer 11

contractile portion of muscle fiber

Question 12

what is a intercalated disk

Answer 12

membranous boundary between adjacent cardiac muscle cells

Question 13

what is the function of the temporalis

Answer 13

closes jaw

Question 14

what is the function of the transversus abdominis

Answer 14

tenses abdominal wall

Question 15

what is the function of the rectus abdominis

Answer 15

flexes and rotates the vertebral column

Question 16

what group is the bicep femoris in

Answer 16

hamstring group

Question 17

what is the function of the gastrocnemius

Answer 17

flexes leg; plantar flexion and eversion of foot

Question 18

what is a tendon

Answer 18

tissue that connects muscle to bone

Question 19

motor neurons

Answer 19

muscle fibers that are stimulated to contract by nerve cells

Question 20

what is all-or-none law for muscles

Answer 20

muscle cell contracts completely or not at all