Cell Transport Flashcards

1
Q

Definition Diffusion

A

The spreading out of the particles of gas of any substance in a solution ( a solute)

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2
Q

Net movement of Diffusion

A

From high to low concentration, down the concentration gradient

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3
Q

Limiting factors of diffusion

A

Difference in concentrations, the temperature and the available surface area

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4
Q

How do substances such as urea and glucose and gases such as oxygen and carbon dioxide move out and into cells?

A

Diffusion

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5
Q

Definition Osmosis

A

The movement of water to dilute a solution across a partially permeable membrane, Down the concentration gradient

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6
Q

Definition Isotonic

A

The concentration of the solution is the same inside and outside the cell

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7
Q

Definition Hypertonic

A

Solution concentration is higher OUTSIDE the cell

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8
Q

Definition Hypotonic

A

Solution concentration is higher INSIDE the cell

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9
Q

Why is osmosis important in plants?

A

To maintain turgor ( turgidity )

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10
Q

Definition Active Transport

A

The movement of substances from a dilute solution to a more concentrated solution against the concentration gradient

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11
Q

Example of Active transport (1animal, 1plant)

A

Small intestine - uptake of sugar
In the roots - (root hair cells)

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12
Q

When an object increases in mass what happens to SA:V?

A

Decreases

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13
Q

Why do most exchange surfaces usually have a large SA and thin walls?

A

To give a short diffusion distance

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