MUSCLE 1

Question 1

How many heart muscles are there?

Answer 1

1

Question 2

Which muscle groups are voluntary types of muscles ?
Cardiac
Skeletal
Smooth

Answer 2

Skeletal

Question 3

What type of muscles are connected to bones and present in sphincters ?

Answer 3

Skeletal

Question 4

Are skeletal muscles striated of non-striated ?

Answer 4

Striated

Question 5

Which muscle types are involuntary ?
Smooth
Skeletal
Cardiac

Answer 5

Smooth
Cardiac

Question 6

Which type of muscle is present within the heart?

Answer 6

Cardiac

Question 7

Are cardiac muscles striated or non-striated ?

Answer 7

Striated

Question 8

Which type of muscle is present in visceral organs, blood vessels, eye, and piloerector

Answer 8

Smooth

Question 9

Are smooth muscles striated or non-striated ?

Answer 9

Non-striated

Question 10

Which muscle type has :
Elongated cell
Multiple peripheral nuclei
Visible striations
Voluntary

Answer 10

Skeletal

Question 11

Which muscle type has :
Spindle shaped cell
Single central nucleus
Lack visible striations
Involuntary

Answer 11

Smooth

Question 12

Which muscle type has :
Branching cell
Single central nucleus
Visible triations
Involuntary

Answer 12

Cardiac

Question 13

Which muscle type has multiple nuclei ?
Smooth/skeletal/cardiac ?

Answer 13

Skeletal

Question 14

Which muscle type has elongated cells ?
Skeletal
Smoot
Cardiac

Answer 14

Skeletal

Question 15

Which muscle type has spindle -shaped cells
Smooth
Skeletal
Cardiac

Answer 15

Smooth

Question 16

Which muscle type has branching cells ?
Skeletal
Smooth
Cardiac

Answer 16

Cardiac

Question 17

Each fibre contains multiple skeletal muscle cells.
True or false?

Answer 17

False,
Each fibre consists of a single skeletal muscle cell

Question 18

Each muscle is covered by dense connective tissue.
True or false?

Answer 18

True

Question 19

Each ____ muscle cell has:
-multiple nuclei
-sarcoplastic reticulum and terminal cisternae contain Ca++
- t-tubule, axon-like fibre that transmits action potential into muscle
-myofibrils

Answer 19

Skeletal

Question 20

Each skeletal muscle cell contains a_____ which is an axon-like fibre that transits action potentials into muscle

Answer 20

T-tubule

Question 21

Each skeletal muscle cell contains _______ which are contractible element of muscle fibre

Answer 21

Myofibrils

Question 22

____ display alternating dark and light bands giving appearance of striations

Answer 22

Myofibril

Question 23

Myofibrils displays alternating dark bands (__ bands ) and light bands (___ bands)

Answer 23

A and I

Question 24

Alternating dark and light bands displayed by myofibrils give appearance of ____

Answer 24

Striations

Question 25

____ is the functional unit of striated muscle, found between 2 Z lines

Answer 25

Sarcomere

Question 26

Myofibrils are comprised of regular arrangement of thick and thin filaments which slide against each other, changing muscle ____

Answer 26

Length

Question 27

___ band : Made up of thick filaments along with protons of thin filaments that overlap on both ends of thick filaments

Answer 27

A

Question 28

__ zone Lighter area within middle of A band where thin filaments do not reach

Answer 28

H

Question 29

__Line Extends vertically down middle of A band within centre of H zone

Answer 29

M

Question 30

____band Consists of remaining portion of thin filaments that do not project into A band

Answer 30

I

Question 31

What section of sarcomere have the following : ___- thick filaments only ____- thin filaments only _____-thick and thin filaments overlap

Answer 31

H zone I band A band

Question 32

_______ consists of A band, H zone, M line and I band

Answer 32

Sarcomere

Question 33

Neuromuscular transmission : 1. Motor neuron action potential activated the release of _____ into the space between nerve and muscle

Answer 33

Acetylcholine

Question 34

Neuromuscular transmission: 2. Acetylcholine bind to ___ receptors on the muscle plasma membrane and is linked to a channel that opens, it lets out a lot of na+ into muscle cell

Answer 34

Nicotinic

Question 35

Neuromuscular transmission : 2. Influx of Na+ depolarizers the cell to a threshold that activates fast na+ channels that produce an ________

Answer 35

Action potential

Question 36

Neuromuscular transmission: 3. Action potential is transmitted along the plasma membrane through the _____ system causing the release of Ca2+ from the sarcoplasmic reticulum

Answer 36

T-tubule

Question 37

Does force of contraction increase or decrease with muscle action potential firing frequency ?

Answer 37

Increase

Question 38

Would an increase or decrease of the following produce in increased contraction : 1. Firing frequency of each motor neuron 2. Recruitment of motor neurons to fire 3. Recruitment of proportion of fast twitch muscle contraction

Answer 38

Increase Increase Increase

Question 39

More motor nerve firing and fast twitch muscle firing produces greater _____

Answer 39

Contraction

Question 40

Do slow fibers have : Large or small amount of myoglobin? Red or pale muscle colour ? Large or small # of mitochondria ? Fast or slow shortening velocity ? Extensive or non-extensive blood supply ? Activated at high or low work intensities ? Easy or resistant to fatigue ?

Answer 40

Large Red Large Slow Extensive Low Resistant

Question 41

Do fast fibers have : Large or small amount of myoglobin? Red or pale muscle colour ? Large or small # of mitochondria ? Fast or slow shortening velocity ? Extensive or non-extensive blood supply ? Activated at high or low work intensities ? Easy or resistant to fatigue ?

Answer 41

Small Pale Small Fast non extensive High Easy