Exam 1 Slide Show (Cells) Pt 1 Flashcards

1
Q

Continuity of life has a _____ basis

A

Cellular

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2
Q

What builds tissue and organs?

A

Cells

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3
Q

Cells generally have

A

Plasma membrane, nucleus, cytoplasm (cytosol, organelles, inclusions)

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4
Q

What one cell type best represents the theoretical cell?

A

Liver hepatocytes

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5
Q

There are over ____ different types of cells

A

200

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6
Q

What is the plasmalemma?

A

Plasma membrane

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7
Q

A plasma membrane can be observed with?

A

Electron microscope ( too thin for a light microscope)

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8
Q

What describes a phospholipid bilayer with associated integral and peripheral proteins?

A

Plasma membrane

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9
Q

What is the structural model of the plasma membrane?

A

The fluid mosaic model

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10
Q

What type of membrane provides the cell with cell movement, growth, division, and self-sealing if torn or puncture?

A

A fluid membrane (plasma membrane)

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11
Q

How do membrane lipids affect the movement of materials across the membrane?

A

By allowing passage of many lipid-soluble substances but providing a barrier to charged or polar substances

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12
Q

I order from greatest to least, what does the lipid bilayer membrane consist of?

A

Phospholipids (75%), Cholesterol (20%), and Glycolipids (5%)

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13
Q

The bilayer occurs because lipids are_____

A

amphipathic (having polar and non-polar )

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14
Q

Inside the lipid bilayer, what mediates membrane fluidity?

A

Cholesterol

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15
Q

What makes the lipid bilayer less fluid (stronger) at normal body temperatures and increases membrane fluidity at lower temperatures?

A

Cholesterol

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16
Q

Membrane proteins are classified as either ______ or ______

A

Integral or peripheral

17
Q

What are determiners of many of the membranes functions and give distinguishable characteristics?

A

proteins

18
Q

Which proteins extend through or well into the bilayer?

A

Integral proteins (amphipathic like lipids)

19
Q

What forms ion channels and transporters?

A

Integral proteins with channel proteins (form ion channels) and carriers (transporters)

20
Q

Which proteins are on one side of the membrane?

A

Peripheral proteins (attach to phospholipid heads or integral proteins and do not go through the membrane)