Ch. 8 Human Biology

Arterioles

As the blood travels through the circulatory system, the greatest drop in pressure occurs in:

All of the above ( heart, baroreceptors, cardiovascular center in mendulla oblongata)

Which of the following is/ are involved in regulating blood pressure?

Pulmonary embolism

Which of the following might be treated appropriately by administering clot- dissolving drugs?

Epinephrine and stimulation via sympathetic nerves

Which of the following might cause the heart rate to increase from 68 beats/min to 120 beats/min?

Endocardium- myocardium- epicardium- pericardium

Which of the following represents the order of structures beginning inside the ventricle and traveling outward?

When the atria contract, the semilunar valves open

Which of the following statements regarding the cardiac cycle is false?

The chordae tendineae

All of the following are part of the cardiac conduction system except:

An increase in heart rate

All of the following mechanisms assists in returning venous blood to the heart except:

narrowing or blockage of the coronary arteries

A heart attack occurs as a result of:

Cardiac arrhythmias

A pacemaker is used to correct:

Capillary

Which blood vessel is best suited for exchange of gases and nutrients with the surrounding tissue?

Artery- arteriole- capillary- venule- vein

Which of the choices represents the order of vessels through which blood pressure after leaving the heart?

Vasoconstriction of arterioles

Which of the following would be an appropriate homeostatic response to a drop in blood pressure below what is normal?

Right and left pulmonary veins

Which vein(s) carry oxygenated blood?

Arteries... Veins

______ carry blood away from the heart and ______ carry blood toward the heart.