BIOS 255 EXAM 1 (Latest Update)
QUESTIONS AND ANSWERS
GRADED A+ VERIFIED
Question : does the right atrium have oxygenated or
deoxygenated blood?
Correct answer: deoxygenated
Question : oxygen is carried by _____ cells. It binds to
proteins called _____ that contain iron.
Correct answer: erythrocytes; hemoglobin
Question : which element is responsible for immune function,
clotting, and gas transfer? (in this particular order)
Correct answer: leukocytes; platelets; erythrocytes
Question : what are the major functions of blood?
Correct answer: - plays a role in immune function
temperature regulation
pH regulation
gas/nutrients/ waste transport
regulates water loss
Question : a patient has a stroke volume of 70ml/beat, a heart
rate of 70 beats per minute, a mean arterial pressure of 100, systolic BP of 95 and diastolic BP of 60. Calculate the output of this patient.
Correct answer: CO = SV x HR
70 x 70 = 4900ml/min = 4.9L/min
Question : 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
Question : what are the three layers of the heart?
Correct answer: epicardium, myocardium, endocardium
Question : what is the fluid filled sac called that surround the
heart?
Correct answer: pericardium
Question : when red blood cells get broken down, the iron
molecule is transferred from the macrophage to the liver with which transfer protein?
Correct answer: transferrin
Question : which wave indicated atrial depolarization?
Correct answer: p wave
Question : what makes up the component of whole blood?
Correct answer: - serum
water
plasma proteins
nutrients
dissolved gasses
electrolytes
Question : where does the breakdown of red blood cells start?
Correct answer: in the macrophage
Question : what is the process of emigration/extravasation and
what subtypes of WBCs most commonly conduct it?
Correct answer: WBCs leaving vessels and migrating to
external infections