bios 255 exam 1 Questions with Detailed Verified Answers for Accuracy

ACCURACY IS GUARANTEED


bios 255 exam 1 Questions with Detailed Verified
Answers for Accuracy



Question: name the structure and whether it contains
oxygenated or deoxygenated blood
Answer: right atrium; deoxygenated


Question: name the structure
Answer: aortic semilunar valve


Question: oxygen is carried by _______ cells. it binds to
proteins called ______ that contain iron
Answer: erythrocytes; hemoglobin


Question: of the formed elements, which cells are
responsible for immune function, clotting, and gas transfer-in
that order?
Answer: leukocytes, platelets, erythrocytes


Question: what are the major functions of blood? (you must
name 3)
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


Question: 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
Answer: CO=SVxHR=70ml/beat/min=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
Answer: upstroke=sodium; depolarization
plateau=calcium; contraction
downstroke=potassium; relaxation


Question: what are the three layers of the heart?
Answer: epicardium, myocardium, endocardium


Question: what is the fluid filled sac called that surrounds
the heart?
Answer: pericardium