Chapter 5 Active Transport Flashcards

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1
Q

In what direction does active transport move molecules?

A

it moves them up or against the concentration gradient from an area of lower concentration to an area of higher concetration

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2
Q

What does active transport require of cell?

A

to expend energy

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3
Q

What type of molecules are moved by passive transport?

A

large macromolecules, wastes, nutrients, proteins, and toxins

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4
Q

What holds the large particles moving into and out of the cell?

A

the vesicles

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5
Q

How does endocytosis move materials into the cell?

A

the cells ingest external materials by folding the cell membrane around the materials and forming a pouch in the cell membrane. the pouch ten pinches off from the membrane and moves into the cell where it becomes a membrane-bound organelle called a vesicle.

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6
Q

What is pinocytosis?

A

a type of endocytosis in which the vesicle contains solvents of fluids

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7
Q

What is phagocytosis?

A

a type of endocytosis where the vesicle contains large particles or whole cells

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8
Q

How does our immune system use phagocytosis?

A

it uses it to engulf and digest invading bacteria

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9
Q

How do single celled organisms use phagocytosis?

A

to feed

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10
Q

How does exocytosis move materials out of the cell?

A

vesicles packaged in the golgi apparatus fuse with the cell membrane, releasing their contents into the external environment

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