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BIOS 255 EXAM 1 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
name the structure and whether it contains oxygenated or
deoxygenated blood - correct answer -right atrium; deoxygenated
name the structure - correct answer -aortic semilunar valve
oxygen is carried by _______ cells. it binds to proteins called
______ that contain iron - correct answer -erythrocytes;
hemoglobin
of the formed elements, which cells are responsible for immune
function, clotting, and gas transfer-in that order? - correct answer
-leukocytes, platelets, erythrocytes
what are the major functions of blood? (you must name 3) -
correct answer -1) plays a role in immune function
2) temp regulation
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3) pH regulation
4) gas/nutrients/ waste transport
5) regulates water loss
a patient has a stroke volume of 70ml/beat, a heart rate of 70
beats/min, a mean arterial pressure of 100, systolic BP of 95 and
diastolic BP of 60. calculate output of this patient - correct answer
-CO=SVxHR=70ml/beat/min=4900ml/min=4.9L/min
which ions mediate the upstroke, plateau, and downstroke of a
cardiac action potential. indicate the contraction phase that
correlates to these events - correct answer -upstroke=sodium;
depolarization
plateau=calcium; contraction
downstroke=potassium; relaxation
what are the three layers of the heart? - correct answer -
epicardium, myocardium, endocardium
what is the fluid filled sac called that surrounds the heart? -
correct answer -pericardium
BIOS 255 EXAM 1 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
name the structure and whether it contains oxygenated or
deoxygenated blood - correct answer -right atrium; deoxygenated
name the structure - correct answer -aortic semilunar valve
oxygen is carried by _______ cells. it binds to proteins called
______ that contain iron - correct answer -erythrocytes;
hemoglobin
of the formed elements, which cells are responsible for immune
function, clotting, and gas transfer-in that order? - correct answer
-leukocytes, platelets, erythrocytes
what are the major functions of blood? (you must name 3) -
correct answer -1) plays a role in immune function
2) temp regulation
, Page | 2
3) pH regulation
4) gas/nutrients/ waste transport
5) regulates water loss
a patient has a stroke volume of 70ml/beat, a heart rate of 70
beats/min, a mean arterial pressure of 100, systolic BP of 95 and
diastolic BP of 60. calculate output of this patient - correct answer
-CO=SVxHR=70ml/beat/min=4900ml/min=4.9L/min
which ions mediate the upstroke, plateau, and downstroke of a
cardiac action potential. indicate the contraction phase that
correlates to these events - correct answer -upstroke=sodium;
depolarization
plateau=calcium; contraction
downstroke=potassium; relaxation
what are the three layers of the heart? - correct answer -
epicardium, myocardium, endocardium
what is the fluid filled sac called that surrounds the heart? -
correct answer -pericardium
