IB SEHS TEST OPTION D: NUTRITION FOR SPORT,EXERCISE

IB SEHS TEST (OPTION D: NUTRITION FOR SPORT,EXERCISE

AND HEALTH) ACTUAL / WITH 16 QUESTIONS AND

VERIFIED ANSWERS GRADED A+

D.1.1: Outline the features of the principal components of the digestive system

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:

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)

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
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