active and bulk transport Flashcards

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1
Q

what type of transport is active and bulk transport?

A

energy is required

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2
Q

what is active transport?

A

the movement of substances against their concentration gradient- moving from an area of low concentration to high concentration

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3
Q

name and explain an example of active transport

A

sodium potassium pump
cells have a high concentration of K+ on the inside and a high concentration of Na+ on the outside
Na+ and K+ ions are moved against the concentration gradient with the help of specific membrane protein and the use of energy
3 Na+ move out and 2 K+ move in

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4
Q

what is involved in bulk transport?

A

vesicle- bubble like sac used to store and transport substances in and out of the cell

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5
Q

what are the two types of bulk transport?

A

endocytosis

exocytosis

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6
Q

what is endocytosis?

A

substances move from outside of the cell to inside of the cell

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7
Q

what are the three parts of endocytosis?

A

phagocytosis
pinocytosis
receptor-mediated endocytosis

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8
Q

what is phagocytosis?

A

intake of a large drop of fluid and larger (undissolved) particles

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9
Q

what is pinocytosis?

A

intake of substances that attach to receptors (proteins) on the surface of the membrane

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10
Q

what is receptor-mediated endocytosis?

A

intake of substances that attach to receptors (proteins) on the surface of the membrane

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11
Q

what is exocytosis?

A

release of substances from the inside of the cell to the outside of the cell

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