The Integument

1.    What is the major chemical component of an insect's exoskeleton?

Protein

Lipid

Chitin

Cellulose

 

2.   Which part of the exoskeleton lies between the exocuticle and the wax layer?

Cuticulin layer

Endocuticle

Procuticle

Cement layer

 

3.   Which part of the exoskeleton is composed of living cells?

Procuticle

Epidermis

Cuticulin layer

Basement membrane

 

4.   Which is NOT part of the epicuticle?

Cuticulin layer

Wax layer

Exocuticle

Cement layer

 

5.   What is the function of the wax layer?

Protection - armor

Muscle attachment

Thermal insulation

Water conservation

 

6.   Rigid, inflexible regions of the exoskeleton are called:

Sutures

Apodemes

Sclerites

Segments

 

7.   A suture is best described as:

A junction between two sclerites

A thick ridge of cuticle

A point of attachment between segments

A membranous bridge

 

8.   What function do quinone cross-linkages have in the exoskeleton?

They make it impermeable to water

They make membranes more flexible

They darken the color of the exoskeleton

They make the sclerites rigid

 

9.   An apodeme could NOT be described as:

A point of attachment for muscles

An internal ridge of the exoskeleton

A brace to strengthen the exoskeleton

A flexible joint in the exoskeleton

 

10.   Which structure is unicellular?

Spine

Seta

Gland

Sclerite