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digestive system p2

digestive system p2

23問 • 2年前

問題一覧

1

. It is an active, voluntary process wherefood is placed into the mouth . First step to the digestive systemprocess occurring in the oral cavity

INGESTION

2

It is the process of propelling food from one organ to the next

PROPULSION

3

-involuntary alternating waves of contraction and relaxation of the longitudinal muscles in the organ wall to move food alongthe tract (e.g. swallowing)

peristalsis

4

It is the process of physicallyfragmenting food into smallerparticles and preparing food forfurther degradation by enzymes Examples of mechanical breakdownare mastication or chewing of foodand churning or mixing of food in thestomach

FOOD BREAKDOWN:MECHANICALBREAKDOWN

5

FOODBREAKDOWN:DIGESTION

The sequence of steps in which large food molecules arechemically broken down to their building blocks by enzymes

6

Organic food molecules:

Monosaccharides or simple sugars (glucose, fructose, galactose) Disaccharides or carbohydrates (sucrose, lactose, maltose, and starch)Proteins Lipids (fats)

7

HORMONESINDIGESTION

Gastrin Somastatin Secretin Cholecystikinin (CKK)

8

- stimulates release ofgastric juice

Gastrin

9

- inhibits secretionof gastric and pancreatic juices

Somastatin

10

- increases pancreaticjuice and bile output

Secretin

11

timulates gallbladder to expelstored bile

Cholecystikinin (CKK)s

12

is the major absorptive site

small intestine

13

It is the transport of digestive and products from the lumen of thetract to the blood or lymph

ABSORPTION

14

The process of chemical digestion is accelerated as the food now takes___our journeythrough the looping coils and twists of the small intestine until digestion and absorptionof all nutrients is completed.

3-6 h

15

limited to the absorption of vit. K and B, some ions,and most of the remaining water

large intestine

16

It is the elimination of indigestible residues from theGI tract via anus in the form of feces

DEFECATION

17

slow segmenting movementin the colon, lasting about 1 minute that occur every30 minutes or so; propel and mix residue

Haustral contractions

18

- long, slow-moving but powerfulcontractile waves that move over large areas of thecolon three or four times daily and force the contents toward the rectum

Mass movements

19

increases the strength of coloncontractions and softens the stool

Fiber

20

- a response of the rectum when it isstretched due to presence of feces pushed via mass movements

DEFECATION REFLEX

21

It causes the walls of the sigmoid colon and the rectum to contract and the anal sphincters to relax

defaction

22

result from any condition that rushes foodresidue through the large intestine before that organ hashad sufficient time to absorb the water (as in irritation ofthe colon by bacteria)

Diarrhea

23

- If food residue remains in the largeintestine for extended periods, too much water isabsorbed, and the stool becomes hard and difficult to pass

Constipation

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問題一覧

1

. It is an active, voluntary process wherefood is placed into the mouth . First step to the digestive systemprocess occurring in the oral cavity

INGESTION

2

It is the process of propelling food from one organ to the next

PROPULSION

3

-involuntary alternating waves of contraction and relaxation of the longitudinal muscles in the organ wall to move food alongthe tract (e.g. swallowing)

peristalsis

4

It is the process of physicallyfragmenting food into smallerparticles and preparing food forfurther degradation by enzymes Examples of mechanical breakdownare mastication or chewing of foodand churning or mixing of food in thestomach

FOOD BREAKDOWN:MECHANICALBREAKDOWN

5

FOODBREAKDOWN:DIGESTION

The sequence of steps in which large food molecules arechemically broken down to their building blocks by enzymes

6

Organic food molecules:

Monosaccharides or simple sugars (glucose, fructose, galactose) Disaccharides or carbohydrates (sucrose, lactose, maltose, and starch)Proteins Lipids (fats)

7

HORMONESINDIGESTION

Gastrin Somastatin Secretin Cholecystikinin (CKK)

8

- stimulates release ofgastric juice

Gastrin

9

- inhibits secretionof gastric and pancreatic juices

Somastatin

10

- increases pancreaticjuice and bile output

Secretin

11

timulates gallbladder to expelstored bile

Cholecystikinin (CKK)s

12

is the major absorptive site

small intestine

13

It is the transport of digestive and products from the lumen of thetract to the blood or lymph

ABSORPTION

14

The process of chemical digestion is accelerated as the food now takes___our journeythrough the looping coils and twists of the small intestine until digestion and absorptionof all nutrients is completed.

3-6 h

15

limited to the absorption of vit. K and B, some ions,and most of the remaining water

large intestine

16

It is the elimination of indigestible residues from theGI tract via anus in the form of feces

DEFECATION

17

slow segmenting movementin the colon, lasting about 1 minute that occur every30 minutes or so; propel and mix residue

Haustral contractions

18

- long, slow-moving but powerfulcontractile waves that move over large areas of thecolon three or four times daily and force the contents toward the rectum

Mass movements

19

increases the strength of coloncontractions and softens the stool

Fiber

20

- a response of the rectum when it isstretched due to presence of feces pushed via mass movements

DEFECATION REFLEX

21

It causes the walls of the sigmoid colon and the rectum to contract and the anal sphincters to relax

defaction

22

result from any condition that rushes foodresidue through the large intestine before that organ hashad sufficient time to absorb the water (as in irritation ofthe colon by bacteria)

Diarrhea

23

- If food residue remains in the largeintestine for extended periods, too much water isabsorbed, and the stool becomes hard and difficult to pass

Constipation