Bio 242 Test 4
closure of the heart valves
Normal heart sounds are caused by which of the following events?
kidney disease
Secondary hypertension can be caused by ________.
when the ventricles are in systole
The atrioventricular (AV) valves are closed when what?
changes in arterial pressure
The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?
pump blood with greater pressure
The left ventricular wall of the heart is thicker than the right wall in order to ________.
skin color
Which of the following factors does not influence heart rate?
atrioventricular (AV) valve
Which of the following is NOT part of the intrinsic conduction system of the heart?
renal regulation
Which of the following processes provides a long-term response to changes in blood pressure?
left ventricle
blood that is being pumped into the systemic circuit comes from which chamber of the heart?
It will result in higher sodium levels in the urine.
each of the following describes the action of aldosterone except one. which of the following does NOT describe he activity of aldosterone hormone?
stenotic valve
failure of a valve to open is termed?
the heart rate would increase by about 25 beats per minute
if the vagal nerves to the heart were cut, the result would be what?
continous capillaries, with no intercellular clefts
in the brain the fluid the filters out of capillaries is highly regulated. You would expect to see ______________ feeding the brain.
increases as blood viscosity increases
peripheral resistance
the amount of friction blood encounters with vessel walls
peripheral resistance is a measurement of what?
capillaries
permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of what?
diffusing directly through endothelial membranes
respiratory gases which are lipid soluble molecules , cross the capillary walls by
the atrioventricular (AV) valves prevent back flow of blood into the atria during ventricular contraction
select the correct statement about the heart valves
ventricular depolarization
the QRS complex of a normal electrocardiogram indicates what?
cardiac output
the amount of blood pumped out of each ventricle in one minute is termed?
elastic arteries
the arteries that are also called distributing arteries which accounts for most names arteries are the what?
connected the two atria in the fetal heart
the foramen ovale:
shock that results from large-scale loss of blood volume, or after vomiting or diarrhea
the form of circulatory shock known as hypovolemic shock is?
coronary arteries
the source of blood carries to capillaries in the myocardium would be the what?
tachycardia
the term for an abnormally fast heart rate is:
slowest in the capillaries because the total cross-sectional area is the greatest
the velocity of blood flow is what?
blood flow
the volume of blood flowing through vessels, organs, or the entire circulation in a given period describes:
epicardium
which layer of the heart wall is the same as the visceral pericardium?
thalamus
which of the following areas of the brain does NOT have an influence on blood pressure?
fluid flows out of the arterial end and in at the venous end
which of the following best describes the net flow of fluid at the capillaries?
cardioacceleratory center via sympathetic trunk
which of the following increases heart rate?
hormonal control
which of the following is NOT an intrinsic control of blood flow?
desmosomes
which of the following is a structure that holds cardiac cells together?
blood vessel diameter
which of the following is the most significant source of blood flow resistance?
ventricular diastole
which of the following means relaxation of the ventricles?
myocardial infarction
which of the following results from prolonged coronary blockage?
pulmonary vein
which of the following transports oxygen-rich blood?
cardiac veins
which of the following vessels does NOT empty into the right atrium?
peripheral resistance
which of the following would have the least influence in blood pressure?
all carry blood away from the heart
which statement best describes arteries?
tunica media
which tunic of an artery is most responsible for matting blood pressure and continuous blood circulation?
veins
which type of vessels contain valves to help prevent back flow of blood?
veins
which vessel types are called capacitance vessels because they contain up to 65% of blood supply?
pulmonary trunk
which vessels of the heart receives blood from the right ventricle?