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Chamberlain University-Illinois
BIOS 252
Chamberlain bios 252 exam 1 Questions and
Answers 2026 Latest Update
skeletal muscle Ans: - long, thin, cylindrical in shape
- multinucleated
- attached to bone & skin
- voluntary
- striated
cardiac muscle Ans: - short, fat, branched
- uninucleated
- in heart
- attached to intercalated discs
- involuntary
- striated
smooth muscle Ans: - in hollow organs
- ininucleated
- involuntary
- lack striations
excitability Ans: responsiveness to chemical signals, stretch, and electrical
changes across the plasma membrane
conductivity Ans: local electrical excitation sets off a wave of excitation that
travels along the muscle fiber
© 2026 All rights reserved
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contractility Ans: shortens when stim
extensibility Ans: capable of being stretched b/w contractions
elasticity Ans: returns to its original rest length after being stretched
organization of skeletal muscle Ans: microfilaments, myofibril, muscle
fiber, muscle fascicle, and skeletal muscle
endomysium Ans: thin sleeve of loose CT around each fiber
perimysium Ans: thicker layer of CT that wraps fascicles
fascicles Ans: bundles of muscle fibers wrapped together
epimysium Ans: fibrous sheath surrounding entire muscle
what are the components of the sarcomere Ans: z disc, m line, a band, i
band, zone of overlap, thick filament, thin filament, zone of overlap,
sarcomere
z disc Ans: narrow, plate-shaped regions of dense materials that separate on
sarcomere from the next
a band Ans: dark, middle part of sarcomere that extends entire length of
thick filaments & includes those part of thin filaments that overlap thick
filament s
i band Ans: lighter, less dense area of sarcomere that contains remainder of
thin filaments but no thick filaments
* z disc passes thru center of each I band
h zone Ans: narrow region in center of each a band that contains thick
filaments but no thin filaments
m line Ans: region in center of h zone that contains proteins that hold thick
filament together at center of sarcomere
fibrous (F) actin Ans: 2 intertwined strands
- string of globular (G) actin subunits each w/ active site that can bind head
of myosin molecule
© 2026 All rights reserved
Chamberlain University-Illinois
BIOS 252
Chamberlain bios 252 exam 1 Questions and
Answers 2026 Latest Update
skeletal muscle Ans: - long, thin, cylindrical in shape
- multinucleated
- attached to bone & skin
- voluntary
- striated
cardiac muscle Ans: - short, fat, branched
- uninucleated
- in heart
- attached to intercalated discs
- involuntary
- striated
smooth muscle Ans: - in hollow organs
- ininucleated
- involuntary
- lack striations
excitability Ans: responsiveness to chemical signals, stretch, and electrical
changes across the plasma membrane
conductivity Ans: local electrical excitation sets off a wave of excitation that
travels along the muscle fiber
© 2026 All rights reserved
, 2 | Page
contractility Ans: shortens when stim
extensibility Ans: capable of being stretched b/w contractions
elasticity Ans: returns to its original rest length after being stretched
organization of skeletal muscle Ans: microfilaments, myofibril, muscle
fiber, muscle fascicle, and skeletal muscle
endomysium Ans: thin sleeve of loose CT around each fiber
perimysium Ans: thicker layer of CT that wraps fascicles
fascicles Ans: bundles of muscle fibers wrapped together
epimysium Ans: fibrous sheath surrounding entire muscle
what are the components of the sarcomere Ans: z disc, m line, a band, i
band, zone of overlap, thick filament, thin filament, zone of overlap,
sarcomere
z disc Ans: narrow, plate-shaped regions of dense materials that separate on
sarcomere from the next
a band Ans: dark, middle part of sarcomere that extends entire length of
thick filaments & includes those part of thin filaments that overlap thick
filament s
i band Ans: lighter, less dense area of sarcomere that contains remainder of
thin filaments but no thick filaments
* z disc passes thru center of each I band
h zone Ans: narrow region in center of each a band that contains thick
filaments but no thin filaments
m line Ans: region in center of h zone that contains proteins that hold thick
filament together at center of sarcomere
fibrous (F) actin Ans: 2 intertwined strands
- string of globular (G) actin subunits each w/ active site that can bind head
of myosin molecule
© 2026 All rights reserved
