PNB 2265 EXAM 1 QUESTIONS AND
ANSWERS
Which of the following factors associated with hemostasis are correctly paired with their
function? - Correct Answers -- Factor XIII: Converts loose fibrin to stabilized fibrin
polymer
- Tissue Factor: The entry point to the extrinsic pathway
Sickle cell anemia is a disorder characterized by: - Correct Answers -Sticky"
Hemoglobin and misshaped erythrocytes.
Which statement(s) is/are true about platelets? - Correct Answers -- Platelets are
normally found in the blood, and some of their clotting factors may become activated
upon exposure to a connective tissue protein.
- Platelets are activated by ADP and Thromboxane A2 (TxA2 or Thromboxane)
Adult hemoglobin is composed of: - Correct Answers -- Four heme groups
- Two Alpha subunits
- Two Beta subunits
Which of the following statements are true about erythrocytes? - Correct Answers --
Production is stimulated by hypoxia (low oxygen) and mediated by EPO
- They have no nucleus.
Which of the following statements are true about the breakdown of red blood cells? -
Correct Answers -- Bilirubin is excreted in urine
- Bilirubin is excreted in bile
- Iron is carried through the plasma by transferrin
A deficiency of vitamin B12 leads to _____A_______ due to _____B_____ . - Correct
Answers -A: Macrocytic anemia
B: Disruption of DNA replication
Which of the following are actions of Thrombin? - Correct Answers -- Activates
Fibrinogin to produce loose fibrin.
- Activates factor XIII
- Activates cascade of clotting proteins
The normal shape of the mature erythrocyte is a _____A_____ . This structure
contributes to the function of ____B______ . - Correct Answers -A: Biconcave disk
B: Oxygen transport from blood to tissues.
B: Proper flow of blood
, Hemoglobin is able to bind to _____________ . - Correct Answers -- Oxygen
- Carbon dioxide
Veins always carry blood __________ - Correct Answers -Toward the heart
Compared to the left ventricle, the right ventricle pumps out ___________ amount of
blood - Correct Answers -The same
The serous pericardium - Correct Answers -Includes a visceral layer overlying the
myocardium.
The ____A_______ of the left ventricle is _____B_____ that of the right ventricle. -
Correct Answers -A: Myocardium
B: Thicker than
The bicuspid valve _________ . - Correct Answers -- Prevents backflow from left
ventricle into left atrium
- Allows blood to flow from left atrium into left ventricle
- Is also called the mitral valve
The pulmonary arteries carry ____A_____ blood from the ______B______ . - Correct
Answers -A: Deoxygenated
B: Right ventricle
The aortic semilunar valve _________ . - Correct Answers -Prevents backflow from
aorta into left ventricle
UNLIKE in skeletal muscle, cardiac muscle __________ - Correct Answers -- Cells are
connected by gap junctions
- Has intercalated disks
The QRS complex represents ___A___, shortly after which the ventricles begin to
____B______. Next, ventricular pressure ____C_____ atrial pressure, and the AV
valves _____D_____. Ventricular pressure _____E_____ until the semilunar valves
____F______ and ventricular ejection begins. This paragraph describes the
____G_____ phase of the cardiac cycle. - Correct Answers -A: Ventricular
depolarization
B: Contract
C: Rises above
D: Close
E: Rises
F: Open
G: Systole
ANSWERS
Which of the following factors associated with hemostasis are correctly paired with their
function? - Correct Answers -- Factor XIII: Converts loose fibrin to stabilized fibrin
polymer
- Tissue Factor: The entry point to the extrinsic pathway
Sickle cell anemia is a disorder characterized by: - Correct Answers -Sticky"
Hemoglobin and misshaped erythrocytes.
Which statement(s) is/are true about platelets? - Correct Answers -- Platelets are
normally found in the blood, and some of their clotting factors may become activated
upon exposure to a connective tissue protein.
- Platelets are activated by ADP and Thromboxane A2 (TxA2 or Thromboxane)
Adult hemoglobin is composed of: - Correct Answers -- Four heme groups
- Two Alpha subunits
- Two Beta subunits
Which of the following statements are true about erythrocytes? - Correct Answers --
Production is stimulated by hypoxia (low oxygen) and mediated by EPO
- They have no nucleus.
Which of the following statements are true about the breakdown of red blood cells? -
Correct Answers -- Bilirubin is excreted in urine
- Bilirubin is excreted in bile
- Iron is carried through the plasma by transferrin
A deficiency of vitamin B12 leads to _____A_______ due to _____B_____ . - Correct
Answers -A: Macrocytic anemia
B: Disruption of DNA replication
Which of the following are actions of Thrombin? - Correct Answers -- Activates
Fibrinogin to produce loose fibrin.
- Activates factor XIII
- Activates cascade of clotting proteins
The normal shape of the mature erythrocyte is a _____A_____ . This structure
contributes to the function of ____B______ . - Correct Answers -A: Biconcave disk
B: Oxygen transport from blood to tissues.
B: Proper flow of blood
, Hemoglobin is able to bind to _____________ . - Correct Answers -- Oxygen
- Carbon dioxide
Veins always carry blood __________ - Correct Answers -Toward the heart
Compared to the left ventricle, the right ventricle pumps out ___________ amount of
blood - Correct Answers -The same
The serous pericardium - Correct Answers -Includes a visceral layer overlying the
myocardium.
The ____A_______ of the left ventricle is _____B_____ that of the right ventricle. -
Correct Answers -A: Myocardium
B: Thicker than
The bicuspid valve _________ . - Correct Answers -- Prevents backflow from left
ventricle into left atrium
- Allows blood to flow from left atrium into left ventricle
- Is also called the mitral valve
The pulmonary arteries carry ____A_____ blood from the ______B______ . - Correct
Answers -A: Deoxygenated
B: Right ventricle
The aortic semilunar valve _________ . - Correct Answers -Prevents backflow from
aorta into left ventricle
UNLIKE in skeletal muscle, cardiac muscle __________ - Correct Answers -- Cells are
connected by gap junctions
- Has intercalated disks
The QRS complex represents ___A___, shortly after which the ventricles begin to
____B______. Next, ventricular pressure ____C_____ atrial pressure, and the AV
valves _____D_____. Ventricular pressure _____E_____ until the semilunar valves
____F______ and ventricular ejection begins. This paragraph describes the
____G_____ phase of the cardiac cycle. - Correct Answers -A: Ventricular
depolarization
B: Contract
C: Rises above
D: Close
E: Rises
F: Open
G: Systole
