EMT chapter 8 quiz

The systolic blood pressure measurement is a reflection of:

• Preload.

• Afterload.

• Left ventricular performance.

• Right ventricular performance.

When there is a reduction in the blood returning to the heart, the typical response of the heart would be to:

• Speed up.

• Slow down.

• Increase filling.

• Decrease filling.

The sympathetic nervous system will do which of the following when stimulated?

• Decrease heart rate.

• Decrease force of contractions.

• Increase stomach acid secretion.

• Increase heart rate.

The ability of the heart cells to depolarize on their own is known as?

• Automaticity.

• Conductivity.

• Contractility.

• Excitability.

Blood vessel size is directly and indirectly controlled by the:

• Somatic nervous system.

• Voluntary nervous system.

• Sympathetic nervous system.

• Parasympathetic nervous system.

Which of the following would be the BEST description of homeostasis?

• The ability of the body to adapt to varying environments.

• The ability of the body to maintain a normal blood pressure.

• The tendency of the body to maintain a net constant composition.

• A decrease in bodily function due to a loss of circulating blood volume.

Which of the following is the common reason we take a breath?

• When the oxygen level is too high in the brain stem.

• When the oxygen level is too low at the cellular level.

• When the carbon dioxide level is too high in the brain stem.

• When the carbon dioxide level is too low at the cellular level.

The reason there are C-shaped rings to support the trachea from collapsing is because of:

• Slimy epithelial tissue.

• Base for cilia movement.

• Negative pressure during inhalation.

• Pressure from the esophagus when food is swallowed.

In the average adult, an increased diastolic pressure is a reflection of an increase in:

• Preload.

• Left ventricular pumping.

• Pulmonary artery pressure.

• Systemic vascular resistance.

What is the primary purpose of the muscles within the blood vessel walls?

• To help maintain blood pressure.

• To keep the blood in the vessels.

• To maintain the shape of the vessels.

• To provide heat through contraction.