Quiz 5 Flashcards
Blood pressure and flow to the brain are monitored by receptors located in the wall of the ______________.
carotid artery
Cerebral capillaries are surrounded by [1] and glial cells and have tight junctions that create the [2].
1) Pericyte
2) blood brain barrier
During isovolumic ventricular contraction, ventricular pressure is ___________.
increasing
[1] refers to the mass movement of fluid between the blood and the interstitial fluid as the result of [2] or [3] pressure gradients. If the direction of bulk flow is into the capillary, the fluid movement is called [4] . If the direction of flow is out of the capillary, the fluid movement is known as [5] .
1) Bulk flow
2) blood/hydrostatic
3) osmotic
4) absorption
5) filtration
The rising phase of the action potential is a result of [1] for skeletal muscle, [2] for contractile myocardium, and [3] for autorhythmic myocardium.
1) Sodium entry
2) Sodium entry
3) Calcium entry
Stretch-sensitive mechanoreceptors known as ________ are located in some artery walls.
baroreceptors
When the heart is in ventricular fibrillation,
effective pumping of the ventricles decreases because the myocardial cells contract in a disorganized manner, and the brain cannot get enough oxygen.
Which CORRECTLY pairs an ECG phase with the cardiac event reponsible?
QRS Complex: depolarization of the ventricles
Blood flow to a tissue will increase if the _____________.
level of carbon dioxide at the tissue increases
Cell junctions in contractile cells are called [1], which contain of two parts: [2] and [3].
1) intercalated discs
2) desmosomes
3) gap junctions
The P-R segment of the ECG represents ____________.
nodal delay at the AV node
Venules are similar to capillaries: they have [1] epithelium and little [2].
1) thin/flat
2) connective tissue/basal lamina/basement membrane
The values obtained when measuring blood pressure, such as 120/80 mm Hg, ______________.
estimates the pressures in the major arteries during systole and diastole
Blood flow is increased by ________.
vasodilation
Doubling which would have the greatest effect on peripheral resistance?
diameter of a vessel
The heart is encased in a tough membranous sac called the [1]. The heart is made up mostly of [2] muscle tissue, called the [3].
1) pericardium
2) cardiac
3) myocardium
The [1] carries blood from the [2] of the heart to the lungs. Backflow of blood to the heart is prevented by the [3] . Blood from the lungs returns to the heart through [4].
1) pulmonary artery
2) right ventricle
3) pulmonary valve
4) pulmonary veins
If the concentration of hydrogen ions increased in a particular tissue, you would expect the blood vessels that supply that tissue to constrict, to prevent the ions from entering surrounds tissues.
False
Sympathetic stimulation promotes an overall increase in blood flow resistance.
True
In the figure which letter represents End Diastolic Volume?
E
Indicate which heart valve was the last one to be crossed by the blood currently inside the structure labeled X in the figure of the heart. (x is on big red vessel i.e. aorta)
aortic valve
