PHYL 141 Lab Exam 2 Questions And
Answers Latest 2025
Sacrolemma -
correct answer ✅plasma membrane of a muscle fiber
Myofibril -
correct answer ✅A long, filamentous organelle found within
muscle cells that has a banded appearance
Actin -
correct answer ✅A globular protein that links into chains, two of
which twist helically about each other, forming microfilaments in
muscle and other contractile elements in cells.
Myosin -
correct answer ✅A protein present in muscle fibers that aids in
contraction and makes up the majority of muscle fiber
,PHYL 141 Lab Exam 2 Questions And
Answers Latest 2025
Sacromeres -
correct answer ✅a structural unit of a myofibril in striated muscle,
consisting of a dark band and the nearer half of each adjacent pale
band.
Is the basic contractile unit of muscle fiber. Each is composed of
two main protein filaments (actin/myosin) which are responsible
for muscular contraction.
thick filaments -
correct answer ✅composed of myosin
thin filaments -
correct answer ✅composed of actin, troponin, tropomyosin
transverse tubules -
correct answer ✅System of tubules that provides channels for ion
flow throughout the muscle fibers to facilitate the propagation of
an action potential.
Terminal cisternae of sarcoplasmic reticulum -
correct answer ✅The action potential on the muscle cell leads to
, PHYL 141 Lab Exam 2 Questions And
Answers Latest 2025
contraction due to the release of calcium ions. Where are calcium
ions stored in the muscle cell?
sarcoplasmic reticulum (SR) -
correct answer ✅specialized smooth endoplasmic reticulum,
which stores, releases, and retrieves Ca++
Mitochondria -
correct answer ✅An organelle found in large numbers in most
cells, in which the biochemical processes of respiration and energy
production occur.
fascile -
correct answer ✅bundle of muscle fibers
Endomysium -
correct answer ✅Connective tissue surrounding a muscle fiber
Perimysium -
correct answer ✅Connective tissue surrounding a fascicle
Answers Latest 2025
Sacrolemma -
correct answer ✅plasma membrane of a muscle fiber
Myofibril -
correct answer ✅A long, filamentous organelle found within
muscle cells that has a banded appearance
Actin -
correct answer ✅A globular protein that links into chains, two of
which twist helically about each other, forming microfilaments in
muscle and other contractile elements in cells.
Myosin -
correct answer ✅A protein present in muscle fibers that aids in
contraction and makes up the majority of muscle fiber
,PHYL 141 Lab Exam 2 Questions And
Answers Latest 2025
Sacromeres -
correct answer ✅a structural unit of a myofibril in striated muscle,
consisting of a dark band and the nearer half of each adjacent pale
band.
Is the basic contractile unit of muscle fiber. Each is composed of
two main protein filaments (actin/myosin) which are responsible
for muscular contraction.
thick filaments -
correct answer ✅composed of myosin
thin filaments -
correct answer ✅composed of actin, troponin, tropomyosin
transverse tubules -
correct answer ✅System of tubules that provides channels for ion
flow throughout the muscle fibers to facilitate the propagation of
an action potential.
Terminal cisternae of sarcoplasmic reticulum -
correct answer ✅The action potential on the muscle cell leads to
, PHYL 141 Lab Exam 2 Questions And
Answers Latest 2025
contraction due to the release of calcium ions. Where are calcium
ions stored in the muscle cell?
sarcoplasmic reticulum (SR) -
correct answer ✅specialized smooth endoplasmic reticulum,
which stores, releases, and retrieves Ca++
Mitochondria -
correct answer ✅An organelle found in large numbers in most
cells, in which the biochemical processes of respiration and energy
production occur.
fascile -
correct answer ✅bundle of muscle fibers
Endomysium -
correct answer ✅Connective tissue surrounding a muscle fiber
Perimysium -
correct answer ✅Connective tissue surrounding a fascicle
