lesson 1 Flashcards

1
Q

is the smallest structural and functional unit of an organism

A

cell

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2
Q

most cells are so small that you cannot see them without the help of a ______

A

microscope

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3
Q

it was not until 1665 that English Scientist ______ invented a ________ & observed cells for the first time by looking at a piece of cork

A

Robert Hooke, Basic Light microscope

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4
Q

A more powerful microscope, called an _______, passes a beam of electrons through the specimen

A

electron microscope

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5
Q

he observed bark of cork trees under a microscope. He thought the objects looked like individual rooms in a _____, which were called cells.

A

Robert Hooke, Monastery

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6
Q

He is a Dutch Scientist. In _______ he used ________. He saw single celled “animals” swimming in the water & called them “________” He was the first person to observe bacteria

A

Anton Van Leeuwenhoek
1683
Simple Microscope
Animacules

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7
Q

Concluded that all plant tissues are composed of cells. Declared that cell is the basic building block of all plant matter

A

Matthias Schleiden

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8
Q

Concluded that all animal tissues are composed of cells.

A

Theodore Schwann

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9
Q

What is the Cell Theory?

A
  1. All organisms are composed of cells
  2. Cells are the basic unit of life.
  3. All cells came from the division of pre-existing cells
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10
Q

He proposed that all cells result from the division of pre-existing living cells.

A

Rudolph Virchow

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11
Q

What are the Function of Cells?

A

Metabolism
Response
Homeostasis
Growth
Reproduction
Nutrition
Defense

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12
Q

FOC: Chemical Reactions inside the cell

A

Metabolism

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13
Q

FOC: Perceiving & receiving to changes in the environment

A

Response

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14
Q

FOC: Keeping conditions inside the organism w/in tolerable limits

A

Homeostasis

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15
Q

FOC: increase in size

A

Growth

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16
Q

FOC: producing offspring

A

Reproduction

17
Q

FOC: Obtaining food to provide energy for growth

18
Q

FOC: protection against enemies

19
Q

What are the specialized cells?

A

RBC
Nerve Cells
Skin cells

20
Q

Shaped like flat discs to move easily& quickly through blood vessels & deliver oxygen all over the body

A

Red Blood Cells

21
Q

Long& stringy in order to form a line of communication with other nerve cells, like a wire

A

Nerve Cells

22
Q

Flat& fit tightly together to protect your body

A

Skin cells

23
Q

He discovered cell in 1665

A

Robert Hooke

24
Q

He observed living cell in 1674

A

Anton Van Leeuwenhoek

25
He discovered Nucleus in 1833
Robert Brown
26
He discovered fluid content of cell in 1835
Felix Dujardin
27
he named the fluid content of the cell as protoplasm in 1839
J. E Purkinje
28
an organism that is made up of only one cell
Unicellular organism
29
an organism that is made up of more than one cell
Multicellular Organism
30
Smallest Cell
Mycoplasma (0.1 micrometer)
31
The unit used to measure size of a cell
micrometer
32
Largest cell
Ostrich egg (18cm)
33
Smallest, Largest, Longest cell in Human
Sperm Cell (5 micrometer) Ovum Cell (120 micrometer) Nerve Cell (1m)
34
Can change their shape to engulf the microorganisms that enter the body
Human White Blood Cells
35
Circular biconcave for easy passage through human capillaries
Human RBCs
36
The structure of a cell as seen under an electron microscope is called _______
ultrastructure
37
Maximum magnification of compound & electron microscope
2000x 500,000x