WITH 100% CORRECT ANSWERS 2025
When erythrocytes are destroyed, which of the following events occurs? - correct answer-
The globin portion of the molecule is broken down into amino acids.
Type AB blood - correct answer-has both A and B antigens on the red cells
In the platelet release reaction, - correct answer-
ADP and thromboxanes stimulate other platelets to become activated.
The hematocrit is - correct answer-d. the percentage of RBCs in a given volume of blood.
What vitamin is necessary to produce many clotting factors in the liver? - correct answer-Vitamin K
A white blood cell engulfing a bacterium is an example of blood functioning in - correct answer-
a. protection.
The oxygenated form of hemoglobin is called - correct answer-oxyhemoglobin
The only formed elements that possess a nucleus when mature are the - correct answer-c. leukocytes
Plasma - correct answer-. is the liquid matrix of the blood.
An increased amount of heparin in the blood might - correct answer-. prevent clotting process.
On which chromosome is there a mutation that leads to sickle cell anemia? - correct answer-
b. chromosome 11
Blood consists of a matrix of plasma and cells; blood is a subtype of tissue. - correct answer-
e. connective
,The ability of white blood cells to leave the circulation and enter tissues is called - correct answer-
b. diapedesis.
The nervous system and certain chemicals can cause the constriction of a blood vessel. This is known
as - correct answer-b. vascular spasm
The cascade of events in the intrinsic pathway can be set into motion when comes into contact
with collagen. - correct answer-factor XII
If a blood buffer is absent, what function of the blood would be compromised? - correct answer-
regulation of pH
What is tissue thromboplastin? - correct answer-
A compound released by damaged tissue that initiates the extrinsic clotting pathway
A deficiency of which of the following stem cells would result in a marked increase in the clotting tim
e of blood? - correct answer-megakaryoblast
Macrophages are derived from - correct answer-monocytes
Which of the following events is one of the three main stages of coagulation? - correct answer-
conversion of fibrinogen to fibrin
The "pacemaker" of the heart is the - correct answer-SA node
Where is blood moving during the period of ejection? - correct answer-Ventricles to great vessels
The adult heart averages ____________ grams. - correct answer-250-300
The epicardium - correct answer-covers the surface of the heart.
,Energy for contraction of myocardial cells comes primarily from - correct answer-
aerobic respiration in the mitochondria
What event(s) occur during the QRS complex of an ECG? - correct answer-
depolarization of the ventricles and repolarization of the atria
The relationship between preload and stroke volume is known as - correct answer-
Starling Law of the heart.
Cardiac muscle cells - correct answer-are maintained by an extensive capillary network.
During the isovolumetric contraction period of the cardiac cycle, - correct answer-
AV and semilunar valves are closed.
Pressure in the right ventricle must exceed pressure in the before the right ventricle can eject blo
od. - correct answer-pulmonary trunk
In the cardiac cycle, - correct answer-all four chambers of the heart are in diastole at the same time.
What cardiac arrhythmia will have no QRS complex as a symptom? - correct answer-
ventricular fibrillation
Which of the following is administered to the people suffering from myocardial infarction following on
set of symptoms? - correct answer-Tissue plasminogen activator (t-PA)
Which of the following might increase the risk for cardiovascular disease? - correct answer-
chronic stress
Aortic stenosis results from - correct answer-a narrowed opening through the aortic valve
An incompetent pulmonary semilunar valve could result in less blood reaching the - correct answer-
lungs
, A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries ar
e partially occluded. Which of the following is the best course of action to treat the disease? -
correct answer-Angioplasty
Angina pectoris is chest pain caused by reduced - correct answer-blood supply to cardiac muscle.
Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells.
This condition is known as a myocardial - correct answer-infarction
What abnormal heart rhythm could be caused by an elevated body temperature, excessive sympathetic
stimulation, or toxic conditions? - correct answer-tachycardia
Which type of vessel has the greatest compliance? - correct answer-veins
Which of the following thoracic organs is supplied by a parietal branch of the thoracic aorta? -
correct answer-the intercostal muscles
Increased pressure in the aortic arch will activate the aortic arch reflex and cause - correct answer-
increased parasympathetic stimulation of the heart.
According to Poiseuille's law, - correct answer-if resistance increases, flow decreases
The vein that ascends along the medial side of the lower limb to the femoral vein is the sapheno
us vein and the vein that ascends along the posterior aspect of the leg to the popliteal vein is the
_ saphenous vein. - correct answer-great; small
If someone has a blood pressure reading of 110/70 mm Hg, their pulse pressure would be -
correct answer-40 mm Hg.
What is the most important means by which capillary exchange occurs? - correct answer-diffusion
Which of the following statements about laminar blood flow is true? - correct answer-
The outermost layer of blood experiences the greatest resistance to flow.