S1 Purpose Of The Gut Flashcards

1
Q

Summarise the purpose of the gut?

A
Provide a port of entry for food
To disrupt food
To temporarily store food
To chemically digest food
Kill pathogens
Absorb nutrients
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2
Q

In digestion, what occurs at the mouth and oesophagus?

A

Mastication
Saliva protects mouth and lubricates food
Formation of bolus

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3
Q

In digestion, what occurs at the stomach?

A
Storage 
Initial disruption - peristaltic contractions mix food, acid and proteolytic enzymes break down bolus forming chyme 
Infection control (HCL)
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4
Q

In digestion, what occurs in the duodenum?

A

Dilution and neutralisation of chyme, by bile and pancreas enzymes

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5
Q

In digestion, what occurs in the small intestine?

A

Absorption of nutrients, electrolytes and most of the water

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6
Q

In digestion, what occurs in the large intestine?

A

Final absorption of water

Faeces form in sigmoid colon

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7
Q

In digestion, what occurs in the rectum?

A

Faeces propelled into rectum where controlled relaxation of sphincters expels them

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8
Q

What chemical are involved in digestion?

A

Saliva - amylase and lipase
Stomach - acid and pepsin (proteins)
Duodenum - bile and HCO3-

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9
Q

What is the peritoneal cavity?

A

The space between the parietal and visceral peritoneum. Contains small amount of fluid.

Visceral covers organs, parietal covers abdominal wall

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