BIO 254 EXAM 2 QUESTIONS WITH ACTUAL
ANSWERS UPDATED 2025 - 2026
Function,of,Osteoclasts,,,ANS,-
Chew,up,bone,,secretes,an,acidic,substance,that,dissolves,"chews",up,bones
Three,layers,of,muscle,,,ANS,-Epimysium,,Perimysium,,Endomysium
Fascicle,,,ANS,-bundle,of,muscle,fibers
myofibril,is,made,up,of,,,ANS,-myofilaments
Myofilaments,,,ANS,-The,contractile,proteins,,Actin,and,Myosin,,of,muscle,cells
Origin,,,ANS,-Attachment,of,a,muscle,that,remains,relatively,fixed,during,muscular,contraction
Insertion,,,ANS,-Point,of,attachment,that,moves,when,the,muscle,contracts
Prime,Mover,,,ANS,-The,muscle,that,acts,as,the,initial,and,main,source,of,motive,power.
Antagonist,,,ANS,-Performs,the,opposite,of,action
Lever,system,components,,,ANS,-Lever,,Effort,,Load
Muscles,,,ANS,-Moves,skeleton,&,Substances.
Heat,Production
Posture,,,ANS,-Are,always,contracting,,unless,we,are,lying,down.
, Characteristics,of,Skeletal,of,Muscle,cells,,,ANS,-Excitability,,Contractility,,Extensibility
Excitability,(irritability),,,ANS,-Ability,to,be,stimulated
Contractility,,,ANS,-Ability,to,contract,,or,shorten,&,produce,body,movement
Extensibility,,,ANS,-
Ability,to,extend,,or,stretch,,thereby,allowing,muscles,to,return,to,the,their,resting,place,length
Sarcolemma,,,ANS,-Plasma,membrane,of,the,muscle,fibers
Where,does,excitation,of,muscle,occur?,,,ANS,-NMJ,(neuromuscular,junction)
Excitation,of,Muscle,part,1,,,ANS,-
In,response,to,a,Action,Potential,(AP),a,motor,neuron,releases,Acetylcholine.,The,Acetylcholine,crosses,th
e,synaptic,cleft,and,binds,to,receptors,on,the,plasma,lemma.
Excitation,of,Muscle,part,2,,,ANS,-
The,AP,triggers,the,release,of,Calcium,from,the,Sarcoplasmic,Reticulum,(SR),,which,in,turns,causes,sodiu
m,to,rush,into,the,sarcoplasm,which,causes,depolarization.,The,AP,travels,up,through,the,T-
tubules,(transverse,tubules).
Muscle,Plasma,Membrane,,,ANS,-Sarcolemma
Muscle,Cell,Cytoplasm,,,ANS,-Sarcoplasm
Acetylcholinesterase,(AChE),,,ANS,-the,enzyme,that,breaks,down,acetylcholine,in,the,synaptic,cleft
Epiphysis,,,ANS,-End,of,a,long,bone
ANSWERS UPDATED 2025 - 2026
Function,of,Osteoclasts,,,ANS,-
Chew,up,bone,,secretes,an,acidic,substance,that,dissolves,"chews",up,bones
Three,layers,of,muscle,,,ANS,-Epimysium,,Perimysium,,Endomysium
Fascicle,,,ANS,-bundle,of,muscle,fibers
myofibril,is,made,up,of,,,ANS,-myofilaments
Myofilaments,,,ANS,-The,contractile,proteins,,Actin,and,Myosin,,of,muscle,cells
Origin,,,ANS,-Attachment,of,a,muscle,that,remains,relatively,fixed,during,muscular,contraction
Insertion,,,ANS,-Point,of,attachment,that,moves,when,the,muscle,contracts
Prime,Mover,,,ANS,-The,muscle,that,acts,as,the,initial,and,main,source,of,motive,power.
Antagonist,,,ANS,-Performs,the,opposite,of,action
Lever,system,components,,,ANS,-Lever,,Effort,,Load
Muscles,,,ANS,-Moves,skeleton,&,Substances.
Heat,Production
Posture,,,ANS,-Are,always,contracting,,unless,we,are,lying,down.
, Characteristics,of,Skeletal,of,Muscle,cells,,,ANS,-Excitability,,Contractility,,Extensibility
Excitability,(irritability),,,ANS,-Ability,to,be,stimulated
Contractility,,,ANS,-Ability,to,contract,,or,shorten,&,produce,body,movement
Extensibility,,,ANS,-
Ability,to,extend,,or,stretch,,thereby,allowing,muscles,to,return,to,the,their,resting,place,length
Sarcolemma,,,ANS,-Plasma,membrane,of,the,muscle,fibers
Where,does,excitation,of,muscle,occur?,,,ANS,-NMJ,(neuromuscular,junction)
Excitation,of,Muscle,part,1,,,ANS,-
In,response,to,a,Action,Potential,(AP),a,motor,neuron,releases,Acetylcholine.,The,Acetylcholine,crosses,th
e,synaptic,cleft,and,binds,to,receptors,on,the,plasma,lemma.
Excitation,of,Muscle,part,2,,,ANS,-
The,AP,triggers,the,release,of,Calcium,from,the,Sarcoplasmic,Reticulum,(SR),,which,in,turns,causes,sodiu
m,to,rush,into,the,sarcoplasm,which,causes,depolarization.,The,AP,travels,up,through,the,T-
tubules,(transverse,tubules).
Muscle,Plasma,Membrane,,,ANS,-Sarcolemma
Muscle,Cell,Cytoplasm,,,ANS,-Sarcoplasm
Acetylcholinesterase,(AChE),,,ANS,-the,enzyme,that,breaks,down,acetylcholine,in,the,synaptic,cleft
Epiphysis,,,ANS,-End,of,a,long,bone
