Anatomy Questions

Which vessel types are called capacitance vessels because they contain up to 65% of blood supply?A) veinsB) capillariesC) pulmonaryD) areteries

Which type of vessels contain valves to help prevent backflow of blood?A) arteriesB) veinsC) capillariesD) arterioles

If the vagal nerves to the heart were cut, the result would be that __.A) the heart rate would increase by about 25 beats per minuteB) the atrioventricular (AV) node would become the pacemaker of the heartC) the heart would stop since the vagal nerves trigger the heart to contractD) parasympathetic stimulation would increase, causing a decrease in heart rate

In the brain the fluid that filters out of capillaries is highly regulated. You would expect to see __ feeding the brain.A) fenestrated capillaries, with thin diaphragms made of extracellular glycoproteinsB) sinusoid capillaries, with incomplete basement membraneC) continuous capillaries, with no intracellular cleftsD) metarterioles leading directly to thoroughfare channels

Secondary hypertension can be caused by __.A) smoking B) kidney diseaseC) stressD) obesity

The QRS complex of a normal electrocardiogram indicates __.A) atrial repolarizationB) ventricular depolarizationC) atrial depolarizationD) ventricular repolarization

The amount of blood pumped out of each ventricle in one minute is termed __.A) blood pressureB) stroke volumeC) heart rateD) cardiac output

Which of the following means relaxation of the ventricles?A) ventricular diastoleB) ventricular systoleC) atrial systoleD) atrial diastole

The atrioventricular (AV) valves are closed __.A) while the atria are contractingB) by the movement of blood from atria to ventriclesC) when the ventricles are in diastoleD) when the ventricles are in systole

The velocity of blood flow is __.A) in direct proportion to the total cross-sectional area of the blood vesselsB) slowest in the capillaries because the total cross-sectional area is the greatestC) slower in the arteries than in capillaries because arteries possess a relatively large diameterD) slower in the veins than in the capillaries because veins have a large diameter

Which of the following vessels does NOT empty into the right atrium?A) superior vena cavaB) cardiac veinsC) inferior vena cavaD) coronary sinus

The left ventricular wall of the heart is thicker than the right wall in order to __.A) accommodate a greater volume of bloodB) pump blood with greater pressureC) expand the thoracic cage during diastoleD) pump blood through a smaller valve

Which of the following is the most significant source of blood flow resistance?A) total blood vessel lengthB) blood viscosityC) blood vessels typeD) blood vessel diameter

Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of __.A) arteriesB) capillariesC) veinsD) arterioles

What percentage of bone matrix is calcium?

How long after fertilization does the skeleton form ?

What percentage of the body's calcium is stored in the skeleton?

Does trabeculae have blood vessels?

Amount of bone tissue grows until the age of

What covers the trabeculae of spongy bone?