Final Sample Test (Modules 1-3) Flashcards
Which of the following is a characteristic of white blood cells?
a. they are able to carry oxygen
b. they possess nuclei
c. white blood cells are broken down to produce bilirubin
d. white blood cells usually live about 120 days
b. they possess nuclei
Which of the following is not a function of blood?
a. regulation of blood pH
b. transport of hormones
c. transferring nerve impulses
d. protect against microbes
c. transferring nerve impulses
White blood cells which are capable of phagocytosis are classified as
a. monocytes
b. lymphocytes
c. neutrophils
d. more than one of the above
d. more than one of the above
Monocytes & Neutrophils
During an emergency transfusion, Mr. Jones who has type AB blood is given a transfusion of type B blood cells. What reaction would you expect?
a. Mr. Jones would have no reaction
b. Mr. Jones will have a severe and immediate reaction
c. not enough information is given to predict what type of reaction would occur
c. not enough information is given to predict what type of reaction would occur
Rh antibodies would be found in
a. Rh+ persons
b. an Rh- person who received an Rh+ blood transfusion
c. an Rh+ person given an Rh- blood transfusion
d. the plasma of Rh- individuals
b. an Rh- person who received an Rh+ blood transfusion
The wall of the left ventricle is thickest because it
a. must pump blood to the lungs and back to the heart
b. pumps blood through the entire heart
c. pumps blood through the entire body
d. contains the SA node
c. pumps blood through the entire body
Blood flows into the right atrium from the
a. pulmonary arteries
b. vena cavae
c. pulmonary veins
d. aorta
b. vena cavae
Blood returning to the heart from the lungs flows into the
a. coronary sinus
b. right atrium
c. left atrium
d. left ventricle
c. left atrium
During ventricular diastole, the
a. ventricular walls are contracted
b. ventricles fill with blood from the atria
c. AV valves are closed
d. semilunar valves are open
b. ventricles fill with blood from the atria
Which of the following is not true concerning the valves of the heart?
a. the opening and closing of the valves depends on pressure changes in the heart
b. the papillary muscles are located on the walls of the heart
c. tightening of the chordae tendinae helps keep the valves from swinging back into the atria
d. the contraction of the papillary muscles helps open the valves
d. the contraction of the papillary muscles helps open the valves
Which of the following is not true concerning the conduction system of the heart?
a. the ventricles are stimulated to contract by impulses originating in the AV node
b. the right side of the heart contracts first, followed by the left side
c. the conduction system originates in the SA node
b. the right side of the heart contracts first, followed by the left side
Which of the following statements is not true?
a. during ventricular diastole, the pressure in the ventricles is low
b. atrial systole begins when the SA node initiates action potentials
c. the atria fill with blood during atrial systole
d. the last 30% of blood which enters the ventricles occurs during atrial systole
c. the atria fill with blood during atrial systole
Which of the following is not true of the cardiovascular center?
a. impulses to the heart via the vagus nerves act to speed up the heartbeat
b. baroreceptors can influence the activity of the cardiovascular center
c. sympathetic impulses from the cardiovascular center cause the heart rate to increase
d. the cardiovascular center affects the conduction system of the heart
a. impulses to the heart via the vagus nerves act to speed up the heartbeat
Which of the following statements about blood vessels is true?
a. capillaries contain valves
b. arterial walls are thicker and contain more elastic tissue than venous walls
c. blood flows most rapidly through capillaries
d. blood pressure in arteries is always lower than in veins
b. arterial walls are thicker and contain more elastic tissue than venous walls
The structure of capillaries allows the rapid and efficient exchange of materials because
a. capillaries can form networks which increase the surface area of exchange
b. capillaries have walls composed of simple squamous epithelium
c. the velocity of blood flow through the capillaries is slow, allowing time for exchange
d. all of the above are true
d. all of the above are true
Which blood vessels contain the largest amount of blood?
a. arteries
b. arterioles
c. capillaries
d. veins and venules
d. veins and venules
Which of the following conditions would increase resistance?
a. depletion of RBCs
b. hemorrhage
c. decrease in blood vessel length
d. dehydration
d. dehydration
Which of the following hormones would you expect to decrease in blood pressure?
a. epinephrine
b. ANP
c. ADH
d. aldosterone
b. ANP
Neurons located in the carotid and aortic bodies which monitor changes in blood CO2 levels are
a. baroreceptors
b. vasodilators
c. chemoreceptors
d. the medulla
c. chemoreceptors
For vasodilation to occur,
a. the vasomotor center relays parasympathetic impulses to the smooth muscle of the arterioles
b. the heart rate must increase
c. sympathetic impulses to the smooth muscle of the arterioles must be increased
d. sympathetic impulses to the smooth muscle of the arterioles must be decreased
d. sympathetic impulses to the smooth muscle of the arterioles must be decreased
The pulmonary trunk
a. carries oxygenated blood back to the heart
b. divides into the pulmonary arteries
c. branches into the pulmonary veins
d. is part of the systemic circulation
b. divides into the pulmonary arteries
T/F
Oxygen binds to the globin portion of hemoglobin.
False
T/F
The heart does not require any outside stimuli in order to contract.
True
T/F
Baroreceptors are neurons which monitor the chemical changes in the blood.
False
T/F
The region of the brain that contains the cardiovascular center is the pons.
False
All of these are non-specific defense mechanisms except
A. flow of saliva
B. phagocytosis
C. neutralization of an antigen by an antibody
D. gastric juice acidity
C. neutralization of an antigen by an antibody
Lymphocytes that destroy cancerous cells in a non-specific fashion are called A. Langerhans cells B. natural killer cells C. cytotoxic T cells D. macrophages
B. natural killer cells
Which of the following is a specific body defense mechanism? A. phagocytosis B. inflammation C. immunity D. fever
C. immunity