Practice Test Flashcards
Which action leads to the closure of the right atrioventricular valve?
Contraction of the right ventricle
As blood is pumped out of the heart and into the major arteries leaving the heart, it
Pushes against the semilunar valves and opens them
The membrane of a contractile cardiac muscle cell contains
Calcium pumps that move calcium out of the cell
During the plateau phase of a cardiac muscle cell’s action potential, the membrane stays
Depolarized as potassium exits and calcium enters
Atrial contraction occurs just before
Isovolumetric contraction
Cardiac output is the amount of blood that is pumped
By a single ventricle in one minute
Sympathetic innervation of the heart
Increases the heartrate and increases the force of contractions
The ______ is composed of circularly arranged layers of smooth muscle cells
Tunica media
Sinusoids are found in
Bone marrow, spleen, and liver
Oxygen and carbon dioxide are transported between the blood and interstitial fluid by the way of
Diffusion from areas of high concentration to low concentration
Which statement accurately compares filtration and reabsorption?
Filtration involves bulk flow of fluid out of the blood, whereas reabsorption is bulk flow back into the blood.
What is the equation for finding the MAP?
MAP = diastolic pressure + ⅓ pulse pressure
In BP 120/80, what does the 120 represent and what does the 80 represent?
120 is systolic, 80 is diastolic
