BIO 256 EXAM 1 2026 BIOLOGY TEST
PAPER QUESTIONS ANSWERS
GRADED A+
◉ an elaborate network of membranes in skeletal muscle cells that
functions in calcium storage is the?
Answer: sarcoplasmic reticulum
◉ a motor neuron and the myofibers it innervates is known as a(n)?
Answer: motor unit
◉ the first thing that stops a muscle contraction after a motor neuron
stops releasing acetylcholine is?
Answer: acetocholinesterase destroys the acetylcholine as it is removed
from the membrane receptors
◉ the role of calcium ions in muscle contraction is to
Answer: bind to regulatory sites on troponin, changing the configuration
and contraction
◉ the number of muscle fibers in a contracted state in an otherwise
relaxed muscle is known as its?
Answer: muscle tone
◉ in an isotonic contraction the muscle...
,Answer: changes in length and moves the load
◉ when stimuli bring about more and more fibers in a contracted state,
this is called
Answer: recruitment
◉ oxygen is stored in myofibers on/in
Answer: myoglobin
◉ the blood vessel type removing carbon dioxide and wastes from the
tissues is
Answer: vein
◉ the mechanism of contraction in smooth muscle parallels that of
skeletal muscle in the following ways EXCEPT
Answer: the calcium-mediated regulation of contraction differs
◉ which blood protein carries blood from the lungs to tissue
Answer: hemoglobin
◉ oxygen is transported by red blood cells, it is carried by
Answer: attaching to the iron ion heme
◉ which of the following is NOT required for erythropoiesis
, Answer: production of vacuoles
◉ which would be associated with prematurely ruptured erythrocytes
Answer: hemolytic anemia
◉ acute leukemia is more common in ____ people; chronic leukemia is
more common in _____ people
Answer: younger, older
◉ which is the correct sequence of events in a cardiac myocardium
action potential
Answer: na+ inward flux --> ca++ inward flux --> k+ outward flux
◉ the normal neutrophil percentage of white blood cells is
Answer: above 50%
◉ cardiac ischemia can result in
Answer: a myocardial infarction
◉ where is the pacemaker located?
Answer: right atrium
◉ a heart beat is normally initiated when
PAPER QUESTIONS ANSWERS
GRADED A+
◉ an elaborate network of membranes in skeletal muscle cells that
functions in calcium storage is the?
Answer: sarcoplasmic reticulum
◉ a motor neuron and the myofibers it innervates is known as a(n)?
Answer: motor unit
◉ the first thing that stops a muscle contraction after a motor neuron
stops releasing acetylcholine is?
Answer: acetocholinesterase destroys the acetylcholine as it is removed
from the membrane receptors
◉ the role of calcium ions in muscle contraction is to
Answer: bind to regulatory sites on troponin, changing the configuration
and contraction
◉ the number of muscle fibers in a contracted state in an otherwise
relaxed muscle is known as its?
Answer: muscle tone
◉ in an isotonic contraction the muscle...
,Answer: changes in length and moves the load
◉ when stimuli bring about more and more fibers in a contracted state,
this is called
Answer: recruitment
◉ oxygen is stored in myofibers on/in
Answer: myoglobin
◉ the blood vessel type removing carbon dioxide and wastes from the
tissues is
Answer: vein
◉ the mechanism of contraction in smooth muscle parallels that of
skeletal muscle in the following ways EXCEPT
Answer: the calcium-mediated regulation of contraction differs
◉ which blood protein carries blood from the lungs to tissue
Answer: hemoglobin
◉ oxygen is transported by red blood cells, it is carried by
Answer: attaching to the iron ion heme
◉ which of the following is NOT required for erythropoiesis
, Answer: production of vacuoles
◉ which would be associated with prematurely ruptured erythrocytes
Answer: hemolytic anemia
◉ acute leukemia is more common in ____ people; chronic leukemia is
more common in _____ people
Answer: younger, older
◉ which is the correct sequence of events in a cardiac myocardium
action potential
Answer: na+ inward flux --> ca++ inward flux --> k+ outward flux
◉ the normal neutrophil percentage of white blood cells is
Answer: above 50%
◉ cardiac ischemia can result in
Answer: a myocardial infarction
◉ where is the pacemaker located?
Answer: right atrium
◉ a heart beat is normally initiated when
