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NWHSU histology 1 exam 3 questions and answers
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NWHSU histology 1 exam 3 questionsand answers
3 iitypes iiof iimuscle?
1. iiSkeletal ii[striated, iivoluntary]
2. iiSmooth ii[visceral iiinvoluntary]
3. iiCardiac ii[striated, iicontinuous iirhythmic iicontract]
1. iiOne iianatomical iimuscle iiis iisurrounded iiby ii__________?
2. iiOne iifascicle iiis iisurrounded iiby ii___________?
3. iiOne iimuscle iifiber iiis iisurrounded iiby ii________________?
1. iiEpimysium ii(fascia)
2. iiPerimysium
3. iiEndomysium
In iia iimuscle iifiber
1. iiWhat iiis iithe iicytoplasm iicalled?
2. iiWhat iiis iithe iiplasma iimembrane iicalled?
3. iiWhat iiis iithe iiexternal iisurface iicovered iiby?
1. iiSarcoplasm
2. iiSarcolemma
3. iiexternal iilamina iiand iireticular iifibers
In iiskeletal iimuscle iiwhere iiare iithe iimultiple, iilong, iiflattened iinuclei iilocated?
Peripherally iilocated iijust iibeneath iithe iisarcolemma.
What iitype iiof ii"cyte" iican iiyou iifind iiinside iithe iiendomysium iiin iibetween iimuscle
iifibers?
Fibrocytes
,Myoglobin iicontent iiof iired iifibers iiand iiwhite iifibers?
Red: iiHigh
White: iiLow
# iiof iimitochondria iiin iired iifibers iivs iiwhite iifibers?
Red: iiMany
White: iiFew
Enzyme iicontent iiin iired iifibers iivs iiwhite iifibers?
Red: iiHigh iiin iioxidative iienzymes ii/ iilow iiin iiATPase
White: iiLow iiin iioxidative iienzmes ii/ iihigh iiin iiATPase iiand iiphosphorylase
Contraction iiof iired iifibers iivs iiwhite iifibers?
Red: iiSlow ii/ iinot iieasily iifatigued
White: iiFast ii/ iieasily iifatigued
Primary iimethod iifor iiATP iigeneration iiof iired iifibers iivs iiwhite iifibers?
Red: iioxidative iiphosphorylation
White: iiAnaerobic iiglycolysis
Glycogen iicontent iiof iired iifibers iivs iiwhite iifibers?
Red: iiLow
White: iiHigh
Inside iiof iione iimuscle iifiber iiare iilong iistructures iicalled ii______________? iiOne iiof
iithese iiis iicomposed iiof iimany ii_____________ iiwith iirepeating iipattern iiof iicross
iistriations.
Myofibrils ii/ iiMyofilaments
One iicontractile iiunit iiin iia iimyofilament iiis iicalled iia?
Sarcomere ii(zband iito iizband)
, Explain iiI iizee iia iihuge iimanhood.
I ii(isotropic) iiband ii- iipale
Z-line iiin iithe iimiddle
A ii(anisotropic) iiband ii-dark
H iiband iiin iithe iimiddle iiof iia iiband
M-line iiin iimiddle iiof iiH iiband
1. iiActin iiis iiattached iito iithe ii__________?
2. iiMyosin iiis iiattached iito iithe ii___________?
1. iiZ-Line
2. iiM- iiLine ii(got iitha iigolf iiclubz iion iiit)
When iia iimuscle iicontracts iiwhat iibands iishorten?
Both iiI iibands iiand iithe iiH iiband
Primary iiproteins iiin iithe iicontractile iiapparatus iiof iiskeletal iimuscle?
Thin iiMyofilament
- iiG-actin iiwhich iipolymerizes ii----> iiF-actin iifilament
- iitropomyosin
- iitroponin
Thick iiFilament
-Myosin iiII ii[a iiband]
The iihead iiof iia iimyosin iiwill iiattach iito iia?
G-actin
What iihappens iito iithe iiA, iiI, iiH, iiand iiZ iibands iiwhen iia iimuscle iicontracts?
A ii- iino iichange
I ii- iishortens
H ii- iishortens
Z iidiscs ii- iimove iicloser iitogether
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