6.1 Digestion Flashcards Preview

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Flashcards in 6.1 Digestion Deck (9)
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1
Q

Amylase

A
  • Salivary amylase
  • Source: salivary amylase
  • Substrate: starch
  • Product: maltose
  • pH7
2
Q

Protease

A
  • Pepsin
  • Source: Gastric juice in stomach
  • Substrate: Protein
  • Product: Short polypeptide
  • pH 2
3
Q

Lipase

A
  • Pancreatic lipase
  • Source: pancreas
  • Substrate: Lipids (triglycerides)
  • Product: Glycerol
  • pH8
4
Q

Stomach

A
  • Acts as a temporary storage tank
  • Gastric glands for chemical digestion
  • Acids - low pH → denatures protein
  • Churning - promotes digestion by mixing food
  • Turns food into chyme (creamy paste)
5
Q

Small intestine

A
  • Nutrients absorbed into bloodstream
  • Pancreas and gall gladder secrete substances to aid in digestion
  • Villi - to increase surface area and optimise the rate of reaction
6
Q

Large intestine

A
  • Absorbs water and dissolved minerals from the indigestible food residue → turns fluid into faeces
  • Faeces stored in rectum, eliminated through anus
7
Q

Absorption

A

Movement of fluid/dissolved substances across membranes

8
Q

Assimilation

A

Conversion of fluids/solid parts to make part of an organism

9
Q

Role of enzymes in digestion

A
  • catalysts that speed up the rate of chemical reaction
  • Allow digestion to occur at body temperature