Digestive System

1.    Which structure lies between the crop and the gastric caecae?

Colon

Pyloric valve

Proventriculus

Esophagus

 

2.   What structure protects the midgut from abrasion by food particles?

Intima

Peritrophic membrane

Proventriculus

Pyloric valve

 

3.   Which structure collects and excretes uric acid?

Malpighian tubule

Rectal pad

Accessory gland

Proventriculus

 

4.   Most enzymatic digestion occurs in the:

Midgut

Gastric caecae

Proventriculus

Crop

 

5.   Which structure is INCORRECTLY paired with its function?

Crop -- storage

Proventriculus -- secretion of enzymes

Malpighian tubules -- excretion

Mesenteron -- digestion

 

6.   Which part of the digestive system prevents excessive water loss in terrestrial insects?

Proventriculus

Gastric caecae

Rectal pads

Accessory glands

 

7.   Which structure would probably NOT be found in an insect that has a continuous supply of food?

Gastric caecae

Malpighian tubules

Intima

Crop

 

8.   Which structure would probably NOT be present in an insect that feeds exclusively on blood?

Crop

Proventriculus

Gastric caecae

Rectum

 

9.   What is the principle energy source for most insects?

Proteins

Cellulose

Carbohydrates

Vitamins

 

10.   Which of these compounds must be present in the diet of most insects?

Cellulose

Fat soluble vitamins

Honedew

Cholesterol