IB SEHS Test Questions With Solutions (Revised & Updated).
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Course
IB Sports
Institution
IB Sports
D.1.1: Outline the features of the principal components of the digestive system - Answer Mouth: locations of both mechanical and chemical digestion
Esophagus: peristalsis action to move food to stomach
Stomach: has rugae lumen and mucous coating; has mechanical and chemical (hydrochloric acid...
IB SEHS Test Questions With Solutions
(Revised & Updated).
D.1.1: Outline the features of the principal components of the digestive system - Answer Mouth:
locations of both mechanical and chemical digestion
Esophagus: peristalsis action to move food to stomach
Stomach: has rugae lumen and mucous coating; has mechanical and chemical (hydrochloric acid)
digestion
Small Intestine: villi and micro-villi to increase area for absorption
Large Intestine: water balance and viatmin absorption
Pancreas: sends digestive enzymes into the SI
Liver: prouces bile (breaks down fat)
Gall Bladder: stores bile when no nee to digest fat (ex- fasting)
Kindeys: water retention and water loss
D.1.2.: State the typical pH values of the digestive organs: - Answer Mouth: 5.5 to 7.5
Stomach: 1.0 to 4.0
Small Intestine: 6.0 to 8.0
D.1.3: Describe the function of enzymes in the context of macronutrient digestion: (include optimum
temp & pH) - Answer enzymes (*aka catalyst*) are proteins that speed up the process of digesting
macronutrients
- activity is highest when it is the optimum temperature & pH
- each reaction needs a specific enzyme
D.1.4: Explain the need for enzymes in digestion: - Answer Increase the rate of digestion of boy temp
by speeding up chemical reactions that help to break down macronutrients into macromolecules
D.1.5.: List the enzymes responsible for breaking down each micronutrient: - Answer Carbs: salivary
(mouth) & pancreatic (pancreas) amylase
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