Balanced Diet and Digestion

Question 1

_________ is when ____ enters the _____

Answer 1

Ingestion is when food enters the mouth

Question 2

_________ breaks down _____ in_______ molecules into _______ _______ molecules

Answer 2

Digestion breaks down large insoluble molecules into smaller soluble molecules

Question 3

__________ is when _____ molecules move from the _________ into the _____

Answer 3

Absorption is when small molecules move from the intestine into the blood

Question 4

____________ is when small ____ molecules are used to _____ l____ molecules

Answer 4

Assimilation is when small food molecules are used to build large molecules

Question 5

________ is the _______ of un________ ____ from ____

Answer 5

Egestion is the removal of undigested food from anus

Question 6

Describe the process of digestion in the mouth [3]

__________ d________ occurs = increase s______ a___ for ________
________ digestion occurs = s_____ released containing ______ a______
_______ breaks down ______ to _______

Answer 6

Mechanical digestion occurs = increase surface area for enzymes
Chemical digestion occurs = saliva released containing enzyme amylase
Amylase breaks down Starch to Maltose

Question 7

Describe and explain how the structure of the small intestine is adapted for
absorbing digested food. [5]

_____ _________ is long
Contains lots of _____ and micro_____
Increasing the _______ ____
__________ the rate of _________
Also _____ walls are ___ c__ _____ meaning a s______ _________ distance
_____ flow _________ c____________ gradient

Answer 7

Small Intestine is long
Contains lots of villi and microvilli
Increasing the surface area
Increasing the rate of diffusion
Also villi walls are one cell wall thick meaning a shorter diffusion distance
Blood flow maintains concentration gradient

Question 8

Explain the role of bile in digestion

N__________ ____ from _______ for an _______ pH for _______
Bile __________ lipids
______ lipids into small ________
To increase s______ a___

Answer 8

Neutralises acid from stomach for an optimum pH for enzymes
Bile emulsifies lipids
Breaks lipids into small droplets
To increase surface area