Chapter 4 Flashcards

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1
Q

Group of similar cells and their products that carry out a specific function

A

Tissue

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2
Q

Smallest unit that can perform all life processes

A

Cell

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3
Q

Maintenance of a constant internal state in a changing environment

A

Homeostasis

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4
Q

Region of a cell within plasma membrane and includes the fluid, the cytoskeleton and all the organelles except nucleus

A

cytoplasm

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5
Q

Groups of tissue that perform a particular job in an organism

A

Organ

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6
Q

Microscopic single-cells organism that has neither a distinct nucleus with a membrane nor other specialized organelles

A

Prokaryote

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7
Q

Well defined, intracellular bodies that perform specific functions for the cell

A

Organelles

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8
Q

Largest and most visible organelle that stores DNA

A

Nucleus

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9
Q

Covers a cell’s surface and acts as a barrier between inside and outside of a cell

A

Plasma membrane

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10
Q

Nucleus is covered by a double membrane is called ?

A

Nuclear envelope

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11
Q

3 principles of cell theory

A
  1. All living things are composed of one or more cells.
  2. Cells are the basic units of structure and function in an organism.
  3. Cells come only from the reproduction of other cells.
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12
Q

All living things share these 8 basic characteristics

A
  1. Organized parts
  2. Obtain energy from their surroundings
  3. Perform chemical reactions
  4. Change with time
  5. Respond to their environment
  6. Reproduce
  7. Homeostasis
  8. Share a common history
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13
Q

Group of organs that accomplished related tasks

A

Organ system

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14
Q

Organisms made up of one or more cells that have nucleus and membrane-branded organelles

A

Eukaryotes

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15
Q

Helped biologists clarify our definition of life. Helped view first cells.

A

Microscope

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16
Q

Size of a cell is limited by the relationship of the cell’s outer surface area to volume

A

Surface area to volume ratio