BMS 107 -EXAM 2 Questions and
Answers 100% Solved
List the 3 types of muscle tissue - ✔✔skeletal, cardiac, smooth
Extensibility - ✔✔the ability to be stretched or extended
Contractility - ✔✔ability to shorten when stimulated
elasticity - ✔✔ability to return to original shape after being stretched
Excitability - ✔✔ability to respond to stimuli
Functions of skeletal muscle - ✔✔movement, posture, heat production
Muscle facicle - ✔✔
Myofibrils - ✔✔
Muscle fibers - ✔✔
connective tissue of muscle - ✔✔epimysium, perimysium, endomysium
Epimysium - ✔✔dense regular connective tissue surrounding entire muscle
Perimysium - ✔✔regular connective tissue surrounding a fascicle
Endomysium - ✔✔areolar connective tissue surrounding a muscle fiber
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Epimysium - ✔✔A
Myofibril - ✔✔G
muscle fascicle - ✔✔D
Endomysium - ✔✔C
muscle fiber - ✔✔E
Perimysium - ✔✔B
blood vessels and nerves - ✔✔F
Z line - ✔✔A
A band - ✔✔D
I band - ✔✔C
M line - ✔✔E
H zone - ✔✔B
What happens with sarcomere during contraction - ✔✔H zone and I band
get smaller/dissappear, moves through m line
Draw a sarcomere - ✔✔
What is a motor unit and how does it relate to precision and/or force? - ✔✔
Muscle fibers type I - ✔✔S
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Muscle fibers type I - ✔✔slow twitch fibers, red, myoglobin and O2
(resistance, marathon)
Muscle fiber type II - ✔✔
Muscle fibers type II - ✔✔fast twitch fibers, white, low myoglobin, lots of
glycogen (rapid fatigue, sprinter)
Muscle fibers type IIb - ✔✔
Muscle fibers type IIb - ✔✔Intermediate fibers, similar to fast fibers but with
more mitochondria, greater resistance to fatigue.
4 types of fascicular arrangement - ✔✔fusiform, convergent, circular and
pennate
fusiform arrangement example - ✔✔
convergent arrangement - ✔✔
circular arrangement - ✔✔
Pennate - ✔✔
Describe cardiac muscle tissue - ✔✔striated, 1 or 2 central nuclei and
involuntary
Describe smooth muscle tissue - ✔✔non-striated, single nuclei and
involuntary