Transport Mechanism Flashcards

1
Q

Regulates passage of molecules into and out of the cell

Provides mechanical shape and strength

Maintains cellular homeostasis

A

Cell membrane

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2
Q

TRANSPORT OF MATERIALS ACROSS THE CELL MEMBRANE

A

Passive and active transport

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3
Q

It moves molecules and ions from a higher concentration to lower concentration without any energy

A

Passive transport

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4
Q

It moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP

A

Active transport

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5
Q

Types of passive transport

A

Diffusion
Facilitated diffusion
Osmosis

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6
Q

It is the net movement of molecules from an area of greater concentration to an area of low concentration.

A

Diffusion

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7
Q

It is the movement of molecules through the plasma membrane with the help of carrier proteins or permeases which changes its shape when a molecule attaches to it.

A

Facilitated diffusion

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8
Q

It is the diffusion of water down its concentration gradient through the cell membrane.

A

Osmosis

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9
Q

For water to travel at a fast rate across the membrane, it passes through channel proteins

A

Aquaporin

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10
Q

Types of cell environment

A

Isotonic
Hypotonic
Hypertonic

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11
Q

A cell and its surrounding have equal solute concentrations.

A

Isotonic

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12
Q

Cell outside environment has less solute than the interior of the cell

Water moves from outside to inside of the cell, resulting in bursting in animal cell. and turgidity in plant cells.

A

Hypotonic

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13
Q

Cell outside environment has greater solute concentration than its inside environment.

Water moves out of the cell, which may shrink cells

A

Hypertonic

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14
Q

bursting of the cell due to a hypotonic environment

A

Cytolysis

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15
Q

shrinking of cells due to a hypertonic environment

A

Plasmolysis

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16
Q

Involves the movement of large and polar molecules into and out of the cell membrane. It involves the formation of membrane-bound sacs or vesicles that pinch off from the cell membrane

A

Bulk transport

17
Q

The cell engulfs particles into a pouch formed by the infolding of the cell membrane.

A

Endocytosis

18
Q

3 types of endocytosis

A

Phagocytosis
Pinocytosis
Receptor mediated endocytosis

19
Q

“Cell Eating” the cell engulfs solid particles into much larger vesicles.

A

Phagocytosis

20
Q

“Cell Drinking” the cell engulfs droplets of fluid.

A

Pinocytosis

21
Q

the cell membrane fold inward forming a pit lined with receptor proteins which bind to specific type of molecules.

The coated pit then moves into the cytoplasm.

A

Receptor mediated endocytosis