PHYSIOLOGY FINAL EXAM PREP DONE APRIL 2025
QUESTIONS AND CORRECT ANSWERS GRADED A+
On which chromosome is there a mutation that leads to sickle cell anemia?
b. chromosome 11
Blood consists of a matrix of plasma and cells; blood is a subtype of ______ tissue.
e. connective
The ability of white blood cells to leave the circulation and enter tissues is called
b. diapedesis.
The nervous system and certain chemicals can cause the constriction of a blood
vessel. This is known as
b. vascular spasm
The cascade of events in the intrinsic pathway can be set into motion when _____
comes into contact with collagen.
factor XII
,If a blood buffer is absent, what function of the blood would be compromised?
regulation of pH
What is tissue thromboplastin?
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 time of blood?
megakaryoblast
Macrophages are derived from
monocytes
Which of the following events is one of the three main stages of coagulation?
conversion of fibrinogen to fibrin
The "pacemaker" of the heart is the
SA node
,Where is blood moving during the period of ejection?
Ventricles to great vessels
The adult heart averages ___________ grams.
250-300
The epicardium
covers the surface of the heart.
Energy for contraction of myocardial cells comes primarily from
aerobic respiration in the mitochondria
What event(s) occur during the QRS complex of an ECG?
depolarization of the ventricles and repolarization of the atria
The relationship between preload and stroke volume is known as
Starling Law of the heart.
Cardiac muscle cells
, are maintained by an extensive capillary network.
During the isovolumetric contraction period of the cardiac cycle,
AV and semilunar valves are closed.
Pressure in the right ventricle must exceed pressure in the ____ before the right
ventricle can eject blood.
pulmonary trunk
In the cardiac cycle,
all four chambers of the heart are in diastole at the same time.
What cardiac arrhythmia will have no QRS complex as a symptom?
ventricular fibrillation
Which of the following is administered to the people suffering from myocardial
infarction following onset of symptoms?
Tissue plasminogen activator (t-PA)
Which of the following might increase the risk for cardiovascular disease?