Exam 2 review

Where does actual gas exchange occur in the lungs?

• Blood vessels

• Alveoli

• Bronchus

• Bronchioles

T/F. expiration is usually a passive process.

• True

• False

T/F. total lung capacity is the total amount of air one can breath in and out.

• True

• False

How is oxygen transported in the blood?

• Bound to hemoglobin and/or dissolved in blood plasma

• Bound to hemoglobin

• Dissolved in blood plasma

• Bound to transport proteins

Why is doing a warm-up beneficial to exercise?

• Increased acidity and temperature favors oxygen unloading

• It warms up the muscles and prepares the body to take on the load of a full workout

• mentally prepares you to start a full length workout

• all of the above (especially A)

What transfers most of CO2 in the blood and lungs?

• oxyhemoglobin

• Deoxyhemoglobin

• Bicarbonate

What are two factors you can change during exercise relating to pulmonary ventilation?

• Rate and depth

• Rate only

• Depth only

• Rate of gas exchange to tissues and hemoglobin saturation

What part of the heart is the natural pacemaker?

• SA Node

• Purkinje fibers

• Vagus Nerve

• Left Ventricle

The PNS acts through the

_______ nerve to decrease heart rate and force of cardiac

contraction.

What is the term for the cardiac arrhythmia characterized by skipped or extra beats from impulses originating outside the SA node?

• Fibrillations

• Premature ventricular contractions (PVC's)

• Tachycardia

• Bradycardia