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.