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WorksheetsGaseous Exchange
Total questions: 20
Worksheet time: 12mins
The amoeba is unicellular protist. It takes in oxygen by diffusion because it has a:
Large SA
Small SA
Large SA:Volume
Small SA:Volume
The image shows a flat worm. This organisms takes in oxygen:
Through its lungs
Through its gills
Through its skin
Insects keep spiracles closed so that:
Air will not escape
Pathogens do not enter and they do not lose moisture
They do not lose moisture
Pathogens do not enter
The respiratory surfaces of insects are called:
Tracheoles
Trachea
Gills
Lungs
In fish gills are the respiratory surfaces. These are efficient because: (tick all right answers)
They have a large SA
They have a 1 cell thick epithelial layer
They have a small SA:Volume
They have a rich capillary network
Both insects and fish need blood to transport oxygen and carbon dioxide
True
False
The leaf is efficient in gaseous exchange due to: (tick all the right answers)
having a thin lamina
having chlorophyll
having several air spaces
having several stomata
The graph is showing the compensation point of plants. This means that: (Tick all the right answers)
The rate of photosynthesis is more than that of respiration
The rate of photosynthesis = The rate of respiration
All the glucose produced is immediately used up by the plant.
The plant was exposed to dim light.
A lot of oxygen is released by the plant into the air.
These are present in the human trachea and prevent it from collapsing.
Rings of chitin
Rings of cartilage
Rings of lignin
The human trachea is equipped to filter the air by having:
Mucus that traps the pathogens
Mucus that traps the pathogens that are then wafted by the cilia
Hairlike cilia to push the pathogens upwards.
During inhaling:
The intercostal muscles and diaphragm relax
The intercostal muscles and diaphragm are not involved
The intercostal muscles and diaphragm contract
During exhaling:
The volume of the lungs increases, and pressure decreases
The volume of the lungs decreases, and pressure increases
The volume of the lungs remains unchanged
The alveoli are efficient in gaseous exchange because: (tick all the right answers)
They are spherical creating a large surface area for diffusion
They lack moisture
They are surrounded by a capillary network ensuring a concentration gradient
Their diffusion distance is several cells thick
During an asthma attack: (Tick all the right answers)
The bronchial muscles relax to allow air in
The bronchial muscle contract preventing flow of air
Inhalers help to relax the bronchial muscles
Chronic bronchitis is when:
A person has a viral infection, but heals after some time
A person has a long lasting infection due to trapped pathogens in the thick bronchial mucus
A person has a bacterial infection for a couple of weeks
A person with emphysema often suffers from shortness of breathe. This is because:
Alveoli are spherical with a small surface area for gaseous exchange
Alveoli are ruptured with a large surface area for gaseous exchange
Alveoli are ruptured with a small surface area for gaseous exchange
Nicotine is a chemical found in cigarettes. It is thought that nicotine: (Tick all the right answers)
decreases the blood pressure
increases the blood pressure
increase fatty substances in blood vessels
is an addictive substance
increases blood flow in the blood vessels
Carbon monoxide is a poisonous gas and may lead to tissue suffocation. This is because:
carbon monoxide combines temporarily to haemoglobin
carbon monoxide combines permanently to haemoglobin
carbon monoxide allows oxygen to combine freely to haemoglobin
The graph shows the breathing rate of two individuals during and after exercise. During exercise both show an increase in breathing rate. This is because
The body needs more oxygen to perform anaerobic respiration
The body has enough oxygen
The body needs more oxygen to perform aerobic respiration
The graph shows the breathing rate of two individuals during and after exercise. After exercise finishes off, the breathing rate remains high for a number of minutes. This is because:
Both individuals had enough oxygen during the exercise.
Both individuals needed to pay off the oxygen debt
Both individuals had enough stored energy
