Internal Anatomy of an Insect

Question 1

scientific term for insect’s hairs. they cause physical allergy or contact dermatitis

Answer 1

seta

Question 2

Why does the epicuticle usually not expand, while the exo- & endocuticle do?

Answer 2

due to its chitin covering

Question 3

part of the insect’s integument that looks like a plate of armor

Answer 3

overlapping sclerite

Question 4

opening in lateral part of insect’s body that is primarily for gas exchange

Answer 4

spiracle

Question 5

insect part responsible for locomotor and wing movement

Answer 5

ganglia

Question 6

A. What part of the body dictates the extent to which the insect is going to eat?
B. Indication for it to stop feeding?

Answer 6

A. brain

B. The indication for it to stop feeding is when it expands its abdomen.

Question 7

A. Metamorphosis is dictated by the ecdysone hormone & the endocrine gland, ____
B. brain is found at the __ side of the insect’s body

Answer 7

A. corpora allata

B. ventral

Question 8

Which is false about the circulatory system of the insect?
A. alary muscles support movement x circ system
B. dorsal diaphragm is located between each alarm muscle
C. haemocele - internal integument
D. thoracic heart can be seen clearly in immature forms

Answer 8

D - it cannot be seen clearly @ immature forms

Question 9

Why do insects have open type of respiratory system?

Answer 9

because of the presence of spiracles

Question 10

A. purpose of crop

B. purpose of gizzard

Answer 10

A. temporary storage prior to grinding

B. grinding of the food

Question 11

A. What is the gastric ceca?

B. What part of the digestive system is considered as the true stomach?

Answer 11

A. the endpart of the foregut and serves as
the boundary between the foregut and midgut
B. midgut

Question 12

identify the part of the insect’s body
primary organs of the excretory system; removes nitrogen-containing wastes and
regulate water and salts in the hemolymph

Answer 12

Malphigian tubules

Question 13

Feces of insects – looks like driftwood because ___

Answer 13

they have to conserve moisture as an adaptation to the parasitic way of life (do not have much chance of getting food esp. the nocturnal ones)

Question 14

The __ & __make up the main blood vessel of an insect.

Answer 14

heart and aorta

Question 15

using the electron microscope, the hemolymph appears green. why?

Answer 15

since the insect’s blood becomes luminous.

Question 16

Which is false?

a. Wings can only be found in the mesothorax and metathorax
b. Antennae used for mating & courtship
c. Styli only found in females

Answer 16

C - styli only found in males