Exam 8: Heart and Blood Vessels

Ventricular fibrillation is occurring in a patient who has just arrived in the emergency room. Which one of the following treatments may be applied immediately to correct this potentially fatal arrhythmia?

A rapid irregular contraction of the ventricles is known as ventricular ________.

Which one of the following blood vessels transports oxygenated blood from the lungs to the heart?

The "lub" of the lub-DUB sounds heard through a stethoscope when listening to the heart is produced by the

Which one of the following parts of the brain regulates heart activity?

When the force of blood on the walls of blood vessels drops below normal, the condition is referred to as

________ prevent the backflow of blood in veins.

All veins carry deoxygenated blood.

Which layer of the heart is in contact with the blood?

Baroreceptors are located in the aorta and ________ arteries.

Angina pectoris includes a number of symptoms that indicate there may be insufficient blood flow to the ________.

In a weakened heart, the heart begins to pump less blood, resulting in blood backing up in the veins causing pressure in veins and capillaries to rise. This condition is called

Each of the following mechanisms plays a role in the return of blood to the heart via veins EXCEPT which one?

Blood pumped from the right ventricle is ________ and enters the ________.

When a person exercises, sensory input from moving muscles and joints results in an increase in cardiac output, causing blood pressure to be maintained, despite an increase in blood flow to the muscles.

Which one of the following is a CORRECT statement?

When baroreceptors are stretched, nerve impulses from these receptors ultimately cause a(n) ________ in cardiac output.

During electrical stimulation of the heart, the impulse pauses briefly at the ________ before continuing on to the ventricles.

The heart muscle itself receives oxygen and nutrients from blood transported by the ________ arteries.

Blood pressure in veins is lower than that in arteries, and a series of ________ are necessary to prevent backflow of blood.