Activities Of The Small Intestine

Question 1

Small intestine

Answer 1

• food entering here is only partially digested
• carbs and protein digestion has begun but little fat digestion
• by the time food reaches the end of the small intestine, digestion is complete and beset all nutrient absorption has occurred
• the macrovilli of the small intestine cells contain brush boarder enzymes
• these break disaccharides into single sugars and complete protein digestion
• intestinal juice is relatively enzyme poor
• however, food is deluged with digestive enzymes from pancreatic juice from the pancreas

Question 2

Pancreatic juice

Answer 2

Contains digestive enzymes: 
Pancreatic amylase 
Protease e.g trypsin 
Lipases 
Nucleases

Question 3

Bile

Answer 3

Made in the liver
Stored in the gall bladder
Gall bladder squirts bile into the duodenum
Bile emulsified lipids, keep in fat droplets - this helps lipases to digest fats

Question 4

Rectum

Answer 4

Forms the last few inches of the digestive tract and is expendable to allow the temporary storage of faeces

Question 5

Anal canal

Answer 5

Controlled by 2 sphincters internal

Terminates in the anus and exit of the DS

Question 6

DS SUMMED UP

Answer 6

The DS carried out 6 processes to achieve its role 
Ingestion 
Mechanical digestion 
Chemical digestion 
Absorption 
Defeaction