16 Questions
What is the function of the rings of cartilage in the human respiratory system?
Prevent the air-passage from collapsing
Why does the surface for gas exchange in the respiratory system need to be fine and delicate?
To increase oxygen absorption
What is the role of alveoli in the human respiratory system?
Provide a surface for gas exchange
How does the chest cavity change during inhalation in humans?
It becomes larger as ribs lift and diaphragm flattens
What is the primary driving force for the movement of water in the xylem during the day?
Transpiration pull
Which process is responsible for the loss of water as vapor from the aerial parts of the plant?
Transpiration
What creates a suction that pulls water from the xylem cells of roots into the leaf?
Transpiration
When is the effect of root pressure more important in the transport of water?
At night
What is the main function of the xylem tissue in plants?
Moving water and minerals obtained from the soil
How are the xylem and phloem tissues described in terms of organization?
Interconnected conducting tubes
What creates a difference in ion concentration between the roots and the soil?
Active uptake of ions by root cells
What is the purpose of covering pots with plastic sheets in Science Activity 6.8 described in the text?
To retain moisture by preventing evaporation
What is the main function of an artificial kidney in case of kidney failure?
To remove nitrogenous waste products from the blood through dialysis
How does an artificial kidney function differ from a natural kidney?
Artificial kidneys remove waste products through dialysis without reabsorption
What happens to the waste products from the blood when it passes through the tubes of an artificial kidney?
They pass into the dialysing fluid by diffusion
Why is it essential for the dialysing fluid in an artificial kidney to have the same osmotic pressure as blood?
To prevent any filtration of blood components into the dialysing fluid
Explore how plants use different strategies to move water upwards from root xylem to the highest points of the plant body. Learn about the role of pressure and stomata in plant water transport.
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