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?