ANIMAL NUTRITION AND DIGESTIVE SYSTEM 3

Question 1

is the point of entry of food into the digestive system

Answer 1

Oral Cavity

Question 2

is a watery substance produced in the mouths of many animals

Answer 2

Saliva

Question 3

There are three major glands that secrete saliva

Answer 3

the parotid, the submandibular, and the sublingual

Question 4

Saliva also contains an enzyme called ______ that begins the process of converting starches in the food into a disaccharide called ______

Answer 4

salivary amylase
maltose

Question 5

Another enzyme called ______ is produced by the cells in the tongue

Answer 5

lipase

Question 6

leads to the lungs

Answer 6

trachea

Question 7

leads to the stomach

Answer 7

esophagus

Question 8

The trachea has an opening called the

Answer 8

glottis

Question 9

covered by a cartilaginous flap called the

Answer 9

epiglottis

Question 10

When swallowing, the epiglottis _____ the glottis and food passes into the _______ and not the _________

Answer 10

closes
esophagus
trachea

Question 11

a tubular organ that connects the mouth to the stomach.

Answer 11

esophagus

Question 12

The smooth muscles of the esophagus undergo a series of wave like movements called _______ that push the food toward the stomach

Answer 12

peristalsis

Question 13

The peristalsis wave is _______—it moves food from the mouth to the stomach, and reverse movement is not possible.

Answer 13

unidirectional

Question 14

A ring-like muscle called a _______ forms valves in the digestive system.

Answer 14

sphincter

Question 15

located at the stomach end of the esophagus.

Answer 15

gastro-esophageal sphincter