Lesson Worksheet: Gas Exchange in Insects Biology
In this worksheet, we will practice describing the key structures associated with gas exchange in insects and relating their structure to their function.
Which of the following statements about the spiracles of an insect is correct?
- AThey allow water to leave the insect’s body, but they do not allow air to enter it.
- BThey are permanently held open, so the rate of gas exchange is directly proportional to the rate of water loss.
- CThey allow air to enter the insect’s respiratory system, but they also allow water loss from the body.
What is the primary purpose of the trachea in insects?
- ATo hold the airways of the insect open and prevent them from collapsing under changes in pressure
- BTo provide a network of vessels to transport oxygenated and deoxygenated blood around the body of the insect
- CTo provide an internal network of tubes that allow gas exchange between the atmosphere and the insect’s tissues
- DTo control the volumes of oxygen entering and water leaving the insect with patterns of opening and closing
Through which structures does air initially enter an insect?
- AThe tracheoles
- BThe bronchi
- CThe trachea
- DThe spiracles
- EThe stomata
How is the volume of air taken in controlled by insects?
- ABy the processes of countercurrent gas exchange
- BBy the opening and closing of the spiracles
- CBy the muscular contractions of the lungs
- DBy the opening and closing of the stomata
Fill in the blanks: When an insect is resting, the ends of the tracheoles contain tracheal . The tracheoles are the location where exchanged with the respiring insect’s tissues.
- Afluid, gases are
- Brings, blood is
- Cvessels, nutrients are
- Dcapillaries, oxygen is
The trachea of an insect has circular bands of chitin. What is the function of this chitin?
- ATo move food through the trachea
- BTo contract and relax the trachea
- CTo produce mucus that allows air to flow through the trachea more easily
- DTo provide structural support to the trachea
The diagram shows the major structures associated with gas exchange in insects. Which number indicates the trachea?
The diagram shows the major structures associated with gas exchange in insects. Which number indicates the tracheoles?
The diagram provided shows a simplified outline of a part of an insect’s respiratory system. How does this specialized respiratory system benefit insects?
- AIt allows all insects to survive for prolonged periods underwater.
- BIt delivers oxygen directly to tissues and cells that are carrying out cellular respiration.
- CIt allows carbon dioxide to be broken down into carbon and oxygen.
- DIt prevents the entry of pathogens.
The diagram shows the major structures associated with gas exchange in insects. Which number indicates the spiracle?