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BIOS 256 EXAM 3 Questions And Correct Answers Verified Latest Guaranteed Pass Grade A + UPDATED!!
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BIOS 256 EXAM 3 Questions And Correct AnswersVerified Latest 2024-2025 Guaranteed Pass Grade A
+ UPDATED!!
Chemical analysis can be used to asses a person's health -
ANSWER>>status of their whole body
Which is NOT a vital sign used to assess the
cardiovascular system? - ANSWER>>serum cholesterol
Which requires nervous system input for stimulation of
muscle contraction? - ANSWER>>skeletal muscle
Glucose delivered to a recovering myofiber is used to -
ANSWER>>reestablish glycogen stores
Heavy exercise causes skeletal muscles to use ________
primarily for their energy needs - ANSWER>>glycogen
Which surrounds a bundle of myofibers? -
ANSWER>>perimysium
What surrounds the individual muscle cell? -
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ANSWER>>endomysium
, The muscle cell plasma membrane is call a -
ANSWER>>sarcolemma
A sarcomere is - ANSWER>>the area between two Z discs
The major function of the sarcoplasmic reticulum in
muscle contraction is to: - ANSWER>>regulate
intracellular calcium concentration
In muscle action potential, the wave of positive mV
charge travels through the ____ to the sarcoplasm from
the sarcolemma. - ANSWER>>T-tubules
A motor neuron and the myofibers it innervates is known
as a - ANSWER>>motor unit
Muscle cells work together in groups known as motor
units. These consist of a motor neuron and -
ANSWER>>the muscle fibers innervated by it
The warm-up period required of athletes in order to
bring their muscles to peak performance is called -
ANSWER>>treppe
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, A muscle cell undergoing treppe is exhibiting ____
summation. - ANSWER>>temporal
Which takes the longest time in a contracting skeletal
myofiber? - ANSWER>>recovery
Oxygen is stored in myofibers on/in -
ANSWER>>myoglobin
In an exercising muscle, myoglobin repletes ___ and
creatine phosphate repletes___. - ANSWER>>O2, ATP
Ca ions bind to ________ in skeletal muscle cells. -
ANSWER>>troponin
____ binds Ca++, exposing _____ binding sites on _____.
- ANSWER>>Troponin, myosin, actin
In muscle contraction, calcium acts to -
ANSWER>>change the shape of the troponin-
tropomyosin complex
Immediately following the arrival of the stimulus at a
skeletal muscle cell there is a short period called the
____ period during which calcium ions are released from
3
the terminal cisterae. - ANSWER>>latent
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, When a muscle is temporarily unable to respond to
stimuli, it is in which of the following periods? -
ANSWER>>refractory period
Select correct statement about the function of
myocardial cells - ANSWER>>The all-or none law as
applied to cardiac muscle means that the atria or
ventricles contract as a unit or not at all.
The myocardium requires ____ oxygen than skeletal
muscle and has ____ mitochondria - ANSWER>>more,
more
In an isotonic contraction, the muscle: -
ANSWER>>changes in length and moves the "load"
In an isometric contraction, muscles - ANSWER>>stay the
same length
To lift a 50 lb, you use ________ contraction; to hold it
above your head you use ________ contraction. -
ANSWER>>isotonic; isometric
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