Bio Question

[Imanm]

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The functional unite of skeletal muscle consists of:
a) One muscle fiber and motor end plate
b) An entire muscle
c) A single motor neuron and the group of muscle cells innervated by it
d) All muscle fibers innervated by a spiral nerve
e) A group of myofibers and their myofilaments



I picked e) because it sounds like the definition of a sacromere to me. answer key says c). I dont know but I think c would be motor unit.
Can somone help please?

 

[Jia7]

Wow i wouldn't know how to answer that either. You are correct - functional unit of the muscle is a sarcomere. E doesn't seem right either because a sarcomere is one myofibril which is made up of a bunch of myofilaments.

 

[jirotrom]

I picked C right away... but I just finished a years worth of Neuro science so thats really the only reason i got it. It has been a while though but to be honest I feel like I've had that same question multiple times in my neuro classes, but I feel this is detailed for DAT.

 

[Jia7]

I picked C right away... but I just finished a years worth of Neuro science so thats really the only reason i got it. It has been a while though but to be honest I feel like I've had that same question multiple times in my neuro classes, but I feel this is detailed for DAT.

So is the functional unit of the skeletal muscle the same as the motor unit? Why is C correct? Thanks for your help!

 

[267862]

So is the functional unit of the skeletal muscle the same as the motor unit? Why is C correct? Thanks for your help!

the functional unit of a skeletal muscle is a motor unit, which is what C defines

A sarcomere I guess isn't the functional unit. Call it a... cellular unit? Dunno

 

[rejuvenatedsoul]

maybe sarcomere is structural whereas motor unit is functional? i couldn't decide b/t e and c :\

 

[267862]

maybe sarcomere is structural whereas motor unit is functional? i couldn't decide b/t e and c :\

yea taht's a better explanation but the answer is definitely C

 

[Imanm]

thanks

 

[DQLEUCD]

functional unit is what makes it works, need nerves to innervate the group of muscles which is the definition of a motor unit of a muscle.