Unit 3 - Gas exchange and ventilation in bony fish and insects

Question 1

As organisms get larger, what happens to the size of the diffusion distance?

Answer 1

It increases

Question 2

As organisms get larger, what happens to the size of the SA:V?

Answer 2

It decreases

Question 3

Why do more active organisms have a greater demand for Oxygen and Glucose?

Answer 3

-more energy is required for more movement
-more ATP must be produced
-more aerobic respiration must occur
-more reactants (glucose and oxygen) is required

Question 4

Why does ventilation increase the efficiency of a gas exchange surface?

Answer 4

Helps to maintain a steep concentration gradient

Question 5

Respiratory organ in fish?

Answer 5

Gills

Question 6

Respiratory organ in insects?

Answer 6

Trachea

Question 7

How does air enter body in insects?

Answer 7

Via spiracles

Question 8

How are gases transported to/from the respiratory surface in fish?

Answer 8

Blood capillaries

Question 9

How are gases transported to/from the respiratory surface in insects?

Answer 9

Tracheoles