Biology 2060 - Anatomy and Physiology II » Summer 2021 » Lecture Exam 1 (1)

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Question #1
The blood type of a person missing the surface antigen D is Rh-positive.
A.   TRUE
B.   FALSE
Question #2
Blood helps regulate the pH and the temperature of the body.
A.   FALSE
B.   TRUE
Question #3
Old erythrocytes are phagocytized in the
A.   spleen.
B.   liver.
C.   liver and spleen.
D.   lung.
E.   spleen and lung.
Question #4
The first phase in hemostasis is
A.   vascular spasm.
B.   elimination ofclots.
C.   platelet plugformation.
D.   coagulation.
Question #5
Platelets are formed elements.
A.   TRUE
B.   FALSE
Question #6
The first phase of hemostasis involves
A.   blood vessel constriction.
B.   fibrinolysis.
C.   blood vesseldilation.
D.   relese of procoagulants.
Question #7
Platelets play a key role in _________, but if they are not used they are broken down after about ________ days.
A.   hemostasis,120
B.   hemostasis, 9
C.   hematopoiesis,120
D.   hematopoiesis,9
Question #8
The GM-CSF growth factor accelerates the formation of all granulocytes and monocytes from their progenitor cells.
A.   TRUE
B.   FALSE
Question #9
An individual’s hematocrit would vary with
A.   altitude.
B.   age.
C.   age, sex, and altitude.
D.   sex.
Question #10
When viewing a centrifuged blood sample, the erythrocytes will be on the top.
A.   FALSE
B.   TRUE
Question #11
Which are the least numerous of the leukocytes?
A.   Eosinophils
B.   Lymphocytes
C.   Basophils
D.   Neutrophils
E.   Monocytes
Question #12
Most colony-stimulating factors are growth factors.
A.   TRUE
B.   FALSE
Question #13
Extensions from megakaryocytes that extend through blood vessel walls in red marrow are sliced off from the cells by the force of blood flow. These extensions are
A.   myeloid stemcells.
B.   reticulocytes.
C.   promegakaryocytes.
D.   proplatelets.
E.   lateerythroblasts.
Question #14
Which pair is located more anteriorly in a heart in normal position?
A.   Left atrium and left ventricle
B.   Right atrium and left ventricle
C.   Right atrium and right ventricle
D.   Left atrium and right ventricle
E.   Right atrium and left atrium
Question #15
Which segment of the ECG reflects the plateau phase of ventricular muscle cells' action potentials?
A.   P-R interval
B.   P-T segment
C.   Q-R segment
D.   T-P interval
E.   S-T segment
Question #16
Which layer is made of dense irregular connective tissue?
A.   Endocardium
B.   Epicardium
C.   Myocardium
D.   Serouspericardium
E.   Fibrouspericardium
Question #17
Each of the receiving chambers of the heart has awrinkled flaplike extension; the one that is more visible from an anterior view is the
A.   right auricle.
B.   interventricularseptum.
C.   left auricle.
D.   interatrialseptum.
Question #18
The term "epicardium" is another name for the
A.   parietal layer of the serosal pericardium.
B.   visceral layer of the serosal pericardium.
C.   mediastinum.
D.   myocardium.
E.   external layer ofthe fibrous pericardium.
Question #19
The atria are separated from the ventricles externally by the
A.   None of the choices is correct.
B.   coronarysulcus.
C.   posteriorinterventricular sulcus.
D.   anteriorinterventricular sulcus.
E.   sinoventricularsulcus.
Question #20
The base of the heart faces in the _____________ directions.
A.   anterior and inferior
B.   anterior and superior
C.   None of these choices is correct.
D.   posterior and inferior
E.   posterior and superior
Question #21
In an ECG, what does the T wave represent?
A.   Closure of the AV valves
B.   Depolarization of the right ventricle
C.   Depolarization ofthe atria
D.   Repolarization of the ventricles
E.   Depolarization of the left ventricle
Question #22
Just prior to atrial contraction,
A.   both ventricles are contracting and blood is being ejected into the major arteries.
B.   all four chambers are at rest and AV valves are open.
C.   both atria are contracting and blood is being ejected into the major arteries.
D.   all four chambers are at rest and AV valves are closed.
E.   all four chambers are contracting and all valves are open.
Question #23
As with action potentials in other types of cells, the repolarization of cardiac muscle cells involves the
A.   binding of ACh to ACh receptor.
B.   entrance of calcium through voltage-gated channels.
C.   exit of potassium through voltage-gated channels.
D.   simultaneous closure of sodium channels and opening of calcium channels.
E.   entrance of sodium through voltage-gated channels.
Question #24
Once an SA nodal cell reaches threshold, the depolarization phase occurs during which
A.   potassium moves out through fast voltage-gated channels.
B.   calcium moves out through slowvoltage-gated channels.
C.   calcium comes in through fast voltage-gated channels.
D.   sodium moves out through slow voltage-gated channels.
E.   potassium comes in through fast voltage-gated channels.

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