Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physiology > week 4 skeletal muscle > Flashcards

week 4 skeletal muscle Flashcards

1
Q

what is the function of skeletal muscle

A

posture, breathing, force production , locomotion , endocrine organ, heat production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

muscles are attacheted to bones by what

A

tendons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the epimysium

A

surrounds muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the perimysium

A

surround the fascicles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the endomysium

A

surrounds individual muscle fibres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is basement membrane

A

just below the endomysium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is sarcolemma

A

muscle membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is myofibrils

A

contains contractile proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

actin is what filament

A

thin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

myosin is which filament

A

thicccck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are the 5 sections of the sarcomere

A

Z LINE, H ZONE, A BAND, I BAN DAND M LINE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is transverse tubules

A

extend from the sarcolemma to the sarcoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is a satellite cell

A

cells help with growth and repair- increase nuclei in mature muscle fibres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the myonuclear domain

A

the volume of sarcoplasm surrounding nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

the more myonuclei means

A

more protein synthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

muscle hypertrophy means a what in myonuclei

A

increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how are skeletal muscles made

A

myoblasts fuse together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the NMJ made of

A

motor neuron and muscle fiber and motor end plate

19
Q

what is the NM cleft

A

the gap between the muscle fiber and the neuron

20
Q

what is ACETYL COA

A

a NT released from the motor neuron and depolarizes the muscle fibre for muscle contraction

21
Q

how many muscle in the human body

A

600

22
Q

why is the myonuclear domain important

A

the nucleus is responsible for gene expression in sarcoplasm

23
Q

motor neurons come from where

A

the spinal cord and innverate muscle fibres

24
Q

what part shortens during the sldiing filament

A

Z LINE AND SARCOMERE

25
Q

Myosin attaches to where

A

actin on the thin filament

26
Q

the release of atp causes what

A

the powerstroke

27
Q

3 sources of atp

A

phosphocreatine, glycolysis, oxidative phosphorylation

28
Q

what percentage average does a muscle shorten by

A

1%

29
Q

what is the contracted mediated by

A

calcium

30
Q

what is fatigue

A

a decline is power output

31
Q

what causes fatigue

A

decrease in force production at cross bridge or and decrease in muscle shortening velocity

32
Q

fatigue is effected by the type of exercise

A

true

33
Q

1-10 intense exercise fatigue caused by what 2 things

A

lack of calcium release from SR, accumulation of metabolites

34
Q

example of metabolites

A

pi, H+ and free radicles

34
Q

what do pi and free radicles do

A

modify cross bridge reducing bridges bound to actin

35
Q

what do h+ do

A

bind calcium binding sites on troponin , preventing calcium binding and contraction

35
Q

causes of fatigue moderate intensity exercise

A

radicles, glycogen depletion, metabolites,

35
Q

depletion of glycogen causes a decrease in what

A

ATP

36
Q

does hydration and electrolytes impact EAMS

A

no

36
Q

what is EAMS

A

exercise assosisated with muscle cramps

36
Q

what is EAMS caused by

A

long high intensity exercise

36
Q

what can is EAMS caused by

A

repeated electrical stimulation from hyper active motor neurons from the spinal cord

36
Q

what can help EAms

A

STATIC STRETCHING

Physiology (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions