A typical, healthy individual produces a systolic pressure between _____ and _____ millimeters of mercury.

A. 90; 120
B. 60; 80
C. 60; 120
D. 60; 90
E. 40; 60

Hypertension occurs when systolic and diastolic blood pressure regularly rises above _____ and _____ millimeters of mercury, respectively.

A. 120; 80
B. 140; 90
C. 80; 60
D. 120; 90
E. 130; 80

What condition describes the thickening of the arterial wall due to the decomposition of plaques of fatty material and inflammatory cells?

A. High blood pressure
B. Myocardial infarction
C. Atherosclerosis
D. Angioplasty
E. Hypertension

Dangerously-clogged blood vessels can be widened by a procedure called a(n) _____.

A. Sphygmomanometer
B. Angioplasty
C. Ablation
D. Transplant
E. Phlebotomy

What is wrong about peristalsis?

A. Its plural form is peristalses.
B. It is stimulated by the nerves in the surrounding esophageal tissue.
C. It is a series of defined cartilaginous contractions.
D. It propels the food into the stomach.

According to this TED speech, what are the four main components of the digestive system?

A. gastrointestinal tract
B. accessory organs of digestive system
C. the body’s enzymes, hormones, nerves, and blood
D. mesentery

A trio of organs that “break down food using an array of special juices” include the following organs except. （单选题）

A. pancreas
B. liver
C. duodenum
D. gallbladder

____supports and positions all digestive organs in the abdomen.

The enzymes of the pancreatic and intestinal juices break proteins into ____, carbohydrates into____, and fat molecules into fatty acids and____.

The byproducts of digestion exit through the____