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UPDATED BIOS 255 EXAM 1
QUESTIONS AND ANSWER S
GRADED A+ VERIFIED
Question : name the structure and whether it contains
oxygenated or deoxygenated blood
Correct Answer: right atrium; deoxygenated
Question : name the structure
Correct Answer: aortic semilunar valve
Question : oxygen is carried by _______ cells. it binds to
proteins called ______ that contain iron
Correct Answer: erythrocytes; hemoglobin
Question : of the formed elements, which cells are
responsible for immune function, clotting, and gas transfer-in that order?
Correct Answer: leukocytes, platelets, erythrocytes
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Question : what are the major functions of blood? (you
must name 3)
Correct Answer: 1) plays a role in immune function
2) temp regulation 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
Correct 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
Correct Answer: upstroke=sodium; depolarization
plateau=calcium; contraction
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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 surrounds
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 indicates atrial depolarization?
Correct Answer: P wave
Question : what makes up this component of whole
blood?
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Correct Answer: serum, water, plasma proteins,
nutrients, dissolved gases and electrolytes
Question : what type of white blood cell is displayed in
this image
Correct Answer: eosinophils
Question : where does the breakdown of red blood cells
start?
Correct Answer: in a macrophage
Question : what is the process of emigration/extravasation
and what subtype of WBC's most commonly conduct it
Correct Answer: WBCs leaving vessels and migrating to
external infections- neutrophils and monocytes
Question : what classifies an individual as anemic?
Correct Answer: they have reduced oxygen-carrying
capacity of blood