Digestive System

Question 1

Taking food and water into the
mouth

Answer 1

Ingestion

Question 2

chewing, mixing, and churning
food

Answer 2

mechanical digestion

Question 3

digestive, enzymes breakdown food

Answer 3

chemical digestion

Question 4

movement of nutrients from
the GI tract to the blood or
lymph

Answer 4

Absorb nutrients

Question 5

elimination of indigestible solid
wastes

Answer 5

Release of waste

Question 6

Two groups of organs in the
digestive system

Answer 6

1. Digestive tract
2. Accessory digestive organs

Question 7

A muscular tube that runs through the body and is responsible for the digestion and absorption of food -oral cavity, pharynx, esophagus, stomach, small intestine, large intestine, and anus.

Answer 7

Digestive tract

Question 8

Aid in the breakdown of foodstuffs- teeth, tongue, salivary glands, liver,
gallbladder, and pancreas

Answer 8

Accessory Digestive Organs

Question 9

The process of digestion
includes six activities:

Answer 9

The process of digestion
includes six activities:

• Ingestion
• Propulsion
• Mechanical or physical
  digestion
• Chemical digestion
• Absorption
• Defecation

Question 10

Taking food into the mouth

Answer 10

Ingestion

Question 11

Movement of food through the digestive tract.

Answer 11

Propulsion

Question 12

voluntary process

Answer 12

swallowing

Question 13

Consists of sequential, alternating waves of contraction and relaxation of alimentary wall smooth muscles, which act to propel food along.

Answer 13

Peristalsis

Question 14

involuntary process

Answer 14

Peristalsis

Question 15

These waves also play a role in mixing food with digestive juices.

Answer 15

Peristalsis

Question 16

Does not change the chemical
nature

Answer 16

Mechanical digestion

Question 17

The mechanical churning of food in the stomach also serves to further break it apart and expose more of its surface area to digestive juices, creating an acidic “soup” called_________.

Answer 17

chyme

Question 18

occurs mainly in the small intestine, consists of localized contractions of circular muscle of the muscularis layer of the
alimentary canal that isolate small sections of the intestine

Answer 18

Segmentation

Question 19

By moving food back and forth in the intestinal lumen, segmentation mixes food with digestive juices and facilitates

Answer 19

Absorption

Question 20

Starting in the mouth,_________ break down complex food molecules into their chemical building blocks (for example, starch into smaller polysaccharides).

Answer 20

digestive secretions

Question 21

These secretions vary in composition, but typically contain water, various enzymes, acids, and salts. The process is completed in the______.

Answer 21

small intestine

Question 22

Iron is absorbed in the_______

Answer 22

duodenum

Question 23

Water and lipids are absorbed
by_____. What type of diffusion?

Answer 23

Passive Diffusion

Question 24

The final step in digestion, undigested materials are?

Answer 24

removed from the body as feces

Question 25

In the mouth, the food is chewed and mixed with saliva, which contains

Answer 25

enzymes

Question 26

Further mechanical and chemical digestion takes place.

Answer 26

In the stomach

Question 27

Most nutrients are absorbed from the lumen of the

Answer 27

alimentary canal

Question 28

From the stomach, chyme is propelled to the?

Answer 28

small intestine by
peristalsis

Question 29

Undigested food is propelled to the large intestine for?

Answer 29

final absorption of water and excretion

Question 30

proteins that speed up chemical reactions in the body

Answer 30

Digestive enzymes

Question 31

Digestive enzymes are released or secreted by what organs?

Answer 31

Digestive system

Question 32

produced in the mouth; helps break down large starch molecules into smaller sugar molecules

Answer 32

Amylase

Question 33

produced in the stomach; helps break down proteins into amino acids

Answer 33

Pepsin

Question 34

produced in the pancreas; also breaks down proteins

Answer 34

Trypsin

Question 35

produced in the pancreas; breaks down fats

Answer 35

Pancreatic lipase

Question 36

Pepsin is active only when?

Answer 36

there is food to digest.

Question 37

A layer that stomach secrets to protect itself from the acidic environment

Answer 37

layer of mucus

Question 38

Functions of HCl

Answer 38

1) Activates inactive pepsinogen into active pepsin
2) Kills bacteria
3) Makes the medium acidic which is suitable for pepsin to
act on proteins