Muscle Physiology

Question 1

What are the 3 types of muscles?

Answer 1

Skeletal, smooth, and cardiac

Question 2

Striated appearance is due to the presence of ___ and ___ bands.

Answer 2

actin and myosin

Question 3

Skeletal muscles provide what to the body via sliding filament mechanism?

Answer 3

motor

Question 4

Is skeletal muscle voluntary or involuntary?

Answer 4

Voluntary

Question 5

What two things are required for muscle contraction in skeletal muscles?

Answer 5

ATP (energy) and calcium

Question 6

The neurotransmitter for skeletal muscles is?

Answer 6

Acetylcholine (Ach)

Question 7

Ach is located at the ends of the _____?

Answer 7

motor neuron (the neuromuscular junction)

Question 8

Skeletal muscles is part of what type of nervous system?

Answer 8

Somatic nervous system

Question 9

Smooth muscle is also called?

Answer 9

Visceral muscle

Question 10

Where is smooth muscle found?

Answer 10

walls of all hollow organs except heart

Question 11

Smooth muscle contain no ____?

Answer 11

Neuromuscular junctions

Question 12

How is the transmitter sent in smooth muscle?

Answer 12

interstitial fluid

Question 13

Muscle relaxation for smooth muscle occurs when?

Answer 13

calcium is moved out of the smooth muscle fibers

Question 14

Smooth muscle fibers are what type of shape?

Answer 14

spindle shaped with single nucleus

Question 15

Is smooth muscle voluntary or involuntary?

Answer 15

Involuntary

Question 16

Cardiac muscle function is to?

Answer 16

pump blood in the circularity system

Question 17

Cardiac muscle’s cells are what type of shape?

Answer 17

branching and striated

Question 18

Where is cardiac muscle located?

Answer 18

wall of heart

Question 19

Is cardiac muscle voluntary or involuntary?

Answer 19

involuntary

Question 20

When muscles are at rest, the calcium is stored in the _____.

Answer 20

Sarcoplasmic reticulum

Question 21

What triggers calcium release?

Answer 21

nerve inpulses

Question 22

The calcium blinds to what on the thin filaments?

Answer 22

troponin

Question 23

What means the contractile unite of a muscle fiber?

Answer 23

Sarcomere

Question 24

What mean muscle fiber?

Answer 24

myofibril

Question 25

What means endoplasmic reticulum that is needed for muscle contraction?

Answer 25

Sarcoplasmic reticulum

Question 26

What means protein bands where actin filaments attach in a striated muscle fiber and mark the boundary of adjoining contractile units?

Answer 26

Z line

Question 27

What means thin plasma cell membranes of the muscle cell?

Answer 27

Sarcolemma