year 10 Science Homework Week 6 - Naomi Arthur | Biblioteka

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Diffusion is the…

Movement of particles from an area of low concentration to an area of low concentration

Movement of particles from an area of high concentration to an area of low concentration

Movement of particles between high and low concentration areas

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Oxygen diffuse from the alveoli to the blood because…

There is a high concentration of oxygen in the alveoli and a low concentration in the blood

There is a low concentration of oxygen in the alveoli and a high concentration in the blood

The alveoli are adapted for this

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Food that has been broken down diffuses from the small intestines to the blood stream because …

There is a high concentration of food molecules in the blood and a low concentration in the small intestines

There is a low concentration of food molecules in the blood and a high concentration in the small intestines

The holes in the wall of the small intestine are the correct size

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Diffusion occurs quickest when…

The temperature is uniform

The surface area is small

The concentration gradient is large

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Diffusion occurs quickest when…

The temperature is high

The temperature is low

The temperature is 37-40oC

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Which adaptation of the alveoli increase the surface area to volume ratio?

Alveoli are moist

Alveoli are spherical

Alveoli have walls that are one cell thick

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How is the small intestine adapted to increase the surface area to volume ratio?

Lined with lots of villi that are small with long finger-like structures

Lined with lots of villi that are small and spherical

Lined with lots of tubules that are small with long finger-like structures

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Which adaptation of the root hair cell increases its surface area to volume ratio?

No chloroplasts

Very thin cell wall

Long protruding finger-like structure

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Why do one-cell thick walls increase the rate of diffusion?

Particles have a shorter distance to travel

The surface area to volume ratio is high

In maintains a high concentration gradient

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Why do one-cell thick walls increase the rate of diffusion?

Particles have a shorter distance to travel

The surface area to volume ratio is high

In maintains a high concentration gradient

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Why does a good blood supply increase the rate of diffusion?

Particles have a shorter distance to travel

The surface area to volume ratio is high

In maintains a high concentration gradient

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Why do the shape of the alveoli, villi and amoeba mean they are adapted for efficient diffusion?

Particles have a shorter distance to travel

The surface area to volume ratio is high

In maintains a high concentration gradient