ACE Animal Anatomy & Physiology 3

Question 1

Which type of insect sensillum is specialized for detecting contact chemicals (taste)?

Accepted Answer

Basiconic sensillum

Answer

Basiconic sensilla are short, peg-like structures found on mouthparts and tarsi that house contact chemoreceptors for taste.

Question 2

The corpora allata produce which hormone critical for maintaining larval characteristics in insects?

Accepted Answer

Juvenile hormone

Answer

Juvenile hormone (JH) produced by the corpora allata suppresses metamorphic changes, keeping the insect in its larval form through successive molts.

Question 3

In a cockroach, the cercal system is primarily used for:

Accepted Answer

Sensing airborne vibrations and triggering escape responses

Answer

Cerci bear mechanoreceptive hairs that detect low-frequency air currents caused by approaching predators, triggering rapid escape.

Question 4

Oenocytes in insects are primarily associated with:

Accepted Answer

Synthesis of cuticular hydrocarbons and lipid processing

Answer

Oenocytes, found in clusters near the epidermis, synthesize cuticular hydrocarbons critical for waterproofing and chemical communication.

Question 5

The peritrophic matrix in insect midguts functions mainly to:

Accepted Answer

Protect midgut epithelium from abrasion and pathogens while allowing enzyme passage

Answer

The peritrophic matrix is a semipermeable chitin-protein membrane that shields midgut cells from damage and pathogens while permitting digestive enzymes to access food.

(ACE) Associate Certified Entomologist Practice Test

(ACE) Associate Certified Entomologist Practice Test

ACE Animal Anatomy & Physiology 3