WorksheetsBiology Animal Nutrition 2
Total questions: 10
Worksheet time: 10mins
Where is the site of absorption of glucose and amino acids?
lacteal
blood capillaries
pancreas
stomach
Why do the villi have long, finger like projections?
to reduce the thickness of barrier for faster absorption
to maintain concentration gradient across the intestinal wall
to increase the thickness of barrier for faster absorption
to increase the surface area to volume ratio for faster absorption
State the structure present on epithelial cells of the villi, which helps to further increase the surface area to volume ratio
(a)
Fatty acids and glycerol are absorbed by which process?
active transport only
active transport and diffusion
diffusion only
diffusion and osmosis
Which of the following is not an adaptation feature of the small intestine to suit its function for absorption?
the small intestine is long and its inner wall is highly folded
the folds have numerous villi
walls of villi are only one cell thick
the surface area is greatly reduced
State the name of substance involved in emulsification process?
(a)
Which event is not true in peristaltic action down the oespohagus?
in front of the bolus of food, circular muscle will contract, whereas longitudinal muscle will relax
in front of the bolus of food, both circular and longitudinal muscle will contract
behind the bolus of food, circular muscle will contract, whereas longitudinal muscle will relax
behind the bolus of food, longitudinal muscle will contract, whereas circular muscle will relax
why does your stomach secrete hydrochloric acid?
to deactivate proteases in the stomach
to allow bacteria in food to survive
to denature enzyme salivary amylase
to provide optimal pH for the action of enzyme salivary amylase
What process will occur to undigested food if they do not get digested along the alimentary canal?
(a)
a person has been diagnosed with a disease, in which the villi in his small intestine is much shorter than normal. Which process is affected and why?
digestion process; because his small intestines cannot be involved in physical digestion
digestion process; because he will have no enzymes secreted into his small intestine
absorption process; because he has reduced surface area to volume ratio, thus slower rate of absorption than normal
absorption process; because he has thicker membrane, thus slower rate of absorption than normal
