Molecules, Membranes, & Movement Lab Quiz Flashcards

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1
Q

What constitutes as a hydrogen bond?

A

Forms between polar molecules
Attraction between partially positive hydrogen atom and a partially negative atom
Individually, weak, but collectively strong

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2
Q

What is currently the accepted model of the plasma membrane?

A

Fluid mosaic model

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3
Q

Define osmosis

A

Osmosis is a type of diffusion
It’s the movement of water across the plasma membrane
Moves from an area of high concentration to an area of low concentration

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4
Q

Define diffusion

A

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached

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5
Q

Define passive transport

A

Movement of substances down to their concentration gradient across the plasma
Passive transport, requires no energy input

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6
Q

What is active transport?

A

Movement of substances, across the plasma membrane against their concentration gradient
Active transport requires energy

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7
Q

What is semi permeability?

A

Some substances move freely through the plasma, membrane, and others do not

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8
Q

Define tonicity

A

Solute concentration of the solution outside the cell compared to the solute concentration of the solution inside the cell

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9
Q

Define hypotonic

A

Lower solute concentration than the cell
Water moves into the cell
Cell swells and burst

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10
Q

Define isotonic

A

Same solute concentration as the cell
No net movement of water
No change in cell shape and size

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11
Q

Define hypertonic

A

Higher solute concentration than the cell
Water moves out of the cell
Cell shrinks

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12
Q

Water has - and is known as the —.

A

Water has great solubility and is known as the universal solvent

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13
Q

What is polar?

A

Polar is when electrons are shared unequally

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14
Q

What is nonpolar?

A

Nonpolar are shared equally electrons

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15
Q

What is the difference between carrier proteins and peripheral proteins?

A

Peripheral proteins recognize proteins, carrier, proteins, transfer proteins

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16
Q

Define hydrophobic

A

Hydrophobic are water fearing they repel water

17
Q

Define hydrophilic

A

Hydrophilic are substances, or things that are water loving, which are absorbing of water

18
Q

What is cohesion?

A

Confusion is a water molecule or a molecule attaching to another of the same

19
Q

What is adhesion?

A

Adhesion is a molecule forming to another molecule different from themselves
Example water molecule to another polar molecule

20
Q

What is surface tension?

A

Surface tension is attention between different surfaces related to the attraction of water molecules found on each surface