Muscle Test

Question 1

attaches to bone, conscious control, striated

Answer 1

skeletal muscle

Question 2

found in internal organs, unconscious control, not striated

Answer 2

smooth muscle

Question 3

found in heart, unconscious control, striated

Answer 3

cardiac muscle

Question 4

immovable end of the muscle

Answer 4

origin

Question 5

movable end of the muscle

Answer 5

insertion

Question 6

the minimal strength of stimulation required to cause a contraction

Answer 6

threshold stimulus

Question 7

a muscle fiber responds completely when exposed to a threshold stimulus or higher

Answer 7

all or none response

Question 8

connections between cell membranes of cardiac muscle cells

Answer 8

intercalated disks

Question 9

basic subunit of skeletal muscle contraction

Answer 9

sarcomere

Question 10

what gives muscle its striated appearance?

Answer 10

the alternating pattern of actin and myosin

Question 11

what makes up the motor unit?

Answer 11

muscle fiber and motor neuron

Question 12

thin and light filaments (I-Band)

Answer 12

actin

Question 13

thick and dark filaments (A-Band)

Answer 13

myosin

Question 14

what causes rigor mortis?

Answer 14

death causes a depletion of ATP so the myosin cross bridge can form, but no “pull” can occur

Question 15

contract slowly, fatigue slowly, have many mitochondria

Answer 15

slow twitch fibers

Question 16

contract quickly, fatigue quickly, have few mitochondria

Answer 16

fast twitch fibers

Question 17

if a muscle continues to be stimulated, at some point it won’t be able to hold the contraction which causes what?

Answer 17

fatigue

Question 18

if a muscle is stimulated multiple times and doesn’t have time to relax completely, then it causes what?

Answer 18

summation

Question 19

if a muscle is constantly stimulated and never relaxes, then it causes what?

Answer 19

tetanus

Question 20

on a myogram, the period of time before a muscle contracts is called the what?

Answer 20

latent period

Question 21

on a myogram, the period of time of the sudden burst of tension is called the what?

Answer 21

contraction period

Question 22

on a myogram, the period of time of the decrease in tension is called the what?

Answer 22

relaxation period