Question

digestive system stations

1. the mechanical breakdown of food by the teeth, as well as the ingestion portion of the digestive process,

begins in which part of the digestive system?
a. pharynx
b. esophagus
c. mouth
d. stomach

1. what is the compact mass of chewed and deconstructed food that is swallowed called?

a. chyme
b. bolus
c. feces
d. bile

1. the enzyme in saliva that starts the chemical digestion of carbohydrates in the mouth is called:

a. pepsin
b. amylase
c. bile
d. bicarbonate

1. what structure reflexively rises to block off the nasopharynx when we swallow?

a. hard palate
b. tongue
c. epiglottis
d. soft palate

1. the propulsion of the bolus through the pharynx and into the esophagus is continued by smooth muscle

contractions in a process called:
a. segmentation
b. ingestion
c. peristalsis
d. defecation

1. what small flap of cartilage blocks off the larynx each time we swallow to ensure the bolus goes into the

esophagus?
a. soft palate
b. trachea
c. epiglottis
d. sphincter

Explanation:

1. The mouth is where teeth mechanically break down food and ingestion (taking in food) begins.
2. A bolus is the compact mass of chewed food that is swallowed.
3. Amylase in saliva starts the chemical digestion of carbohydrates.
4. The soft palate reflexively rises to block the nasopharynx when swallowing.
5. Peristalsis is the process of smooth - muscle contractions that propel the bolus through the pharynx and esophagus.
6. The epiglottis is the small flap of cartilage that blocks the larynx during swallowing.

Answer:

1. C. Mouth
2. B. Bolus
3. B. Amylase
4. D. Soft palate
5. C. Peristalsis
6. C. Epiglottis