BIOS 255 Exam Questions and Answers | 2026
Update | 100% Correct.
name the structure and whether it contains oxygenated or deoxygenated blood
right atrium; deoxygenated
name the structure
aortic semilunar valve
oxygen is carried by _______ cells. it binds to proteins called ______ that contain iron
erythrocytes; hemoglobin
of the formed elements, which cells are responsible for immune function, clotting, and gas
transfer-in that order?
leukocytes, platelets, erythrocytes
what are the major functions of blood? (you must name 3)
1) plays a role in immune function
2) temp regulation
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
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
upstroke=sodium; depolarization
plateau=calcium; contraction
downstroke=potassium; relaxation
what are the three layers of the heart?
epicardium, myocardium, endocardium
what is the fluid filled sac called that surrounds the heart?
pericardium
when red blood cells get broken down, the iron molecule is transferred from the
macrophage to the liver with which transfer protein?
transferrin
Which wave indicates atrial depolarization?
P wave
what makes up this component of whole blood?
serum, water, plasma proteins, nutrients, dissolved gases and electrolytes
what type of white blood cell is displayed in this image
eosinophils
where does the breakdown of red blood cells start?
Update | 100% Correct.
name the structure and whether it contains oxygenated or deoxygenated blood
right atrium; deoxygenated
name the structure
aortic semilunar valve
oxygen is carried by _______ cells. it binds to proteins called ______ that contain iron
erythrocytes; hemoglobin
of the formed elements, which cells are responsible for immune function, clotting, and gas
transfer-in that order?
leukocytes, platelets, erythrocytes
what are the major functions of blood? (you must name 3)
1) plays a role in immune function
2) temp regulation
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
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
upstroke=sodium; depolarization
plateau=calcium; contraction
downstroke=potassium; relaxation
what are the three layers of the heart?
epicardium, myocardium, endocardium
what is the fluid filled sac called that surrounds the heart?
pericardium
when red blood cells get broken down, the iron molecule is transferred from the
macrophage to the liver with which transfer protein?
transferrin
Which wave indicates atrial depolarization?
P wave
what makes up this component of whole blood?
serum, water, plasma proteins, nutrients, dissolved gases and electrolytes
what type of white blood cell is displayed in this image
eosinophils
where does the breakdown of red blood cells start?
