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Bio 161 Exam 4 Questions And Answers With Verified Solutions Rated A+
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Bio 161 Exam 4 Questions And Answers With Verified Solutions Rated A+
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Bio 161 Exam 4 Questions And AnswersWith Verified Solutions Rated A+
(pre week 10) Muscle fiber - ANSWER✔✔ an individual muscle cell
fascicle - ANSWER✔✔ group of muscle cells within the belly of a muscle
sarcolemma - ANSWER✔✔ plasma membrane of a skeletal muscle cells
sarcoplasm - ANSWER✔✔ cytoplasm of skeletal muscle cell
sarcomere - ANSWER✔✔ Contractile unit of muscle cell that makes a myofibril
sarcoplasmic reticulum - ANSWER✔✔ modified endoplasmic reticulum that
regulates calcium in the cell
T (transverse) tubules - ANSWER✔✔ tubes continuous with the sarcolemma that
convey electrical current to the interior of the cell
myofibril - ANSWER✔✔ the major protein component of a muscle cell, made up
of myofilaments
myoglobin - ANSWER✔✔ oxygen-binding protein in a muscle cell
multi-nucleate - ANSWER✔✔ containing many nuclei
Epimysium - ANSWER✔✔ fibrous connective tissue that is continuous with the
tendon
What type of muscle cell is striated? skeletal, cardiac, smooth - ANSWER✔✔
skeletal, cardiac
skeletal muscle cells tend to contain short, branched cells. true or false -
ANSWER✔✔ false, skeletal muscles contain very long and cylindrical
(lecture 14 muscular structure) Excitable - ANSWER✔✔ respond to chemicals
released from motor neurons
, conductive - ANSWER✔✔ ability to propagate electrical signals over membrane
contractile - ANSWER✔✔ ability to shorten and generate force
extensible - ANSWER✔✔ ability to be stretched without damaging the tissue
elastic - ANSWER✔✔ ability to return to original shape after being stretched
What characteristics. do neurons and muscle cells share? - ANSWER✔✔
excitability- response to chemicals release from motor neurons
skeletal muscle - ANSWER✔✔ voluntary, striated, multinucleate, attached to
bone/fascia (connective tissue)
cardiac muscle - ANSWER✔✔ Involuntary muscle tissue found only in the heart,
striated, mononuclear, autorhytmic (cells can self regulate contraction)
smooth muscle - ANSWER✔✔ Involuntary muscle found inside many internal
organs of the body, non-striated, mononuclear, hair follicles, walls of hollow
organs
Tendon connection - ANSWER✔✔ muscle to bone, collagen fibers of epimysium
form strong fibrous tendon (dense regular C.T) merges into periosteum (outer
bone) most common connection, biceps brachii, calf muscles
Aponeurosis connection - ANSWER✔✔ some muscles do not insert directly into
bone, insert to broad sheet of C.T similar to tendon but broad and flat, ex.
abdominal muscles
Fascicle - ANSWER✔✔ group of muscle cells (fibers)
muscle cell (fiber) - ANSWER✔✔ filled with long bundles of proteins (myofibrils)
myofibrils - ANSWER✔✔ 2 types of proteins (my-filaments actin and myosin)
myofilaments - ANSWER✔✔ The contractile proteins, actin and myosin, of
muscle cells, organized into sarcomeres
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