Crowdly

Vital capacity increases.

Forced expiratory volume increases.

Tidal volume increases.

Which of the following causes bronchodilation?

Histamine

Drugs that block 2-adrenergic receptors

Epinephrine

Parasympathetic nervous system

The secretion of adrenaline in the adrenal medulla is directly stimulated by

Vasopressin

Aldosterone

Acetylcholine

Norepinephrine

The chronic respiratory failure is characterized by the following changes in the hemogram

Anemia

Erythrocytosis

Leukocytosis

Leukopenia

Which of the following applies to the blood in the pulmonary artery?

Hydrostatic pressure is very high

It is flowing into the left atrium

PCO2 is low

PO2 is low

Why does ventricular fibrillation result in cardiac arrest?

The ventricles contract before the atria.

Insufficient blood is supplied to the myocardium.

Parasympathetic stimulation depresses the SA node.

Delayed conduction through the AV node blocks ventricular stimulation.

Hypotension refers to a decrease in blood pressure below the level

95/60 mm Hg .

80/40 mm Hg .

110/70 mm Hg .

90/50 mm Hg .

The following class of lipoproteins carriers cholesterol from cells to the liver

LDL

Chylomicrons

HDL

VLDL

The most common cause of a myocardial infarction is:

an infection of the heart muscle.

a disruption of the heart conduction system.

atherosclerosis involving an attached thrombus.

an imbalance in calcium ions.

The basic pathophysiology of myocardial infarction is best described as:

total obstruction of a coronary artery, which causes myocardial necrosis.

cardiac output that is insufficient to meet the needs of the heart and body.

temporary vasospasm that occurs in a coronary artery

irregular heart rate and force, reducing blood supply to coronary arteries.