age 1 of 43
BIO 256 EXAM 1 2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST VERSION>
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.
How does exercising assure greater blood delivery to the active
muscles? .......Answer.........muscle blood flow can increase tenfold
or more during physical activity as vasodilation occurs
Zobob committed suicide by taking an overdose of sleeping
pills. When his body was found, he still held the bottle in his
hand and the coroner could not pry open his hand. Why was his
hand still holding the bottle? How long had it been since he
,age 2 of 43
died? .......Answer.........He was in rigor mortis due to lack of ATP.
He had been dead between 3 and 12 hours.
Rigor mortis occurs because .......Answer.........ATP required to
detach myosin from actin molecules is depleted
Zobob has mitral valve stenosis and incompetence. She is having
trouble breathing and she is coughing up a whitish sputum. How
would her heart problems be causing her pulmonary symptoms?
.......Answer.........because the stenosis and incompetence make the
left ventricle's pumping inefficient, this results in positive net
filtration pressure. So fluid builds up in the lungs, thus the sputum
formation.
Chemical analysis can be used to asses a person's health
.......Answer.........status of their whole body
,age 3 of 43
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?
.......Answer.........endomysium
, age 4 of 43
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
BIO 256 EXAM 1 2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST VERSION>
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.
How does exercising assure greater blood delivery to the active
muscles? .......Answer.........muscle blood flow can increase tenfold
or more during physical activity as vasodilation occurs
Zobob committed suicide by taking an overdose of sleeping
pills. When his body was found, he still held the bottle in his
hand and the coroner could not pry open his hand. Why was his
hand still holding the bottle? How long had it been since he
,age 2 of 43
died? .......Answer.........He was in rigor mortis due to lack of ATP.
He had been dead between 3 and 12 hours.
Rigor mortis occurs because .......Answer.........ATP required to
detach myosin from actin molecules is depleted
Zobob has mitral valve stenosis and incompetence. She is having
trouble breathing and she is coughing up a whitish sputum. How
would her heart problems be causing her pulmonary symptoms?
.......Answer.........because the stenosis and incompetence make the
left ventricle's pumping inefficient, this results in positive net
filtration pressure. So fluid builds up in the lungs, thus the sputum
formation.
Chemical analysis can be used to asses a person's health
.......Answer.........status of their whole body
,age 3 of 43
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?
.......Answer.........endomysium
, age 4 of 43
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
