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Anatomy And Phys. > Unit 3 > Flashcards

Unit 3 Flashcards

1
Q

What is a cell? List the four principal parts of the cell

A

The basic living structural and functional unit of all organisms, cell membrane cytosol organelles nucleus

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2
Q

What is selective permeability? How does it help the cell maintain homeostasis?

A

Meditates entrance and exit of material into and out of cell. That allows the cell to bring in nutrients and chemicals it needs while removing waste products from its internal environment

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3
Q

If red blood cells are surrounded by a hypertonic solution, how will water move in relation to the cells and why

A

The water will move out of the red blood cells and into the fluid causing the cells to shrink. There is a greater concentration of water within the blood cells than the surrounding fluid

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4
Q

The two major portions of the cell each surrounded by a membrane are the…

A

Nucleus and cytosol

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5
Q

The organelles are located in the

A

Cytosol

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6
Q

True or false

An inact cell membrane is essential to the life of the cell

A

True

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7
Q

True or false

The cell membrane is composed of phospholipids and proteins

A

True

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8
Q

True or false

The cell membrane does not participate in chemical reactions

A

False

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9
Q

True or false

The cell membrane is selectively permeable

A

True

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10
Q

The lipid that lends some rigidity to the cell membrane is

A

Phospholipid

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11
Q

Deceive the overall structure of the cell membrane, how is this structure related to function?

A

Composed of a phospholipid bilayer which contains many globular proteins which act as gates or channels. The protein carriers regulate the diffusion of all the other substances

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12
Q

The compound responsible for the special functions of the cell membrane is

A

Proteins

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13
Q

The … directs the overall activities of the cell

A

Nucleus

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14
Q

The organelle that functions as a communication and transportation system for the cytoplasm is the

A

Endoplasmic reticulum

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15
Q

The chemical activity in the endoplasmic reticulum results in

A

Synthesis of proteins

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16
Q

Which of the following statement about ribosomes is false

A

The secretion of ribosomes is utilized only within the cell

17
Q

The mitochondria are also called … of cells

A

Powerhouse

18
Q

The enzymes of the lysosome function to

A

Digest bacteria, food and damaged cell parts

19
Q

Peroxisomes are found most commonly in the cells of the…

A

Liver, kidneys

20
Q

What is true about centrosome

A

It is located near the nucleus
The centrioles of the centrosome function in reproduction of the cell
The centrosome is concerned with the distribution of genetic material

21
Q

Mobile, hairlike projections that extend outward from the surface of the cell are called…

A

Cilia, flagella

22
Q

Thin threadlike structures found within the cytoplasm forming the cytoskeleton of the cell called…

A

Microtubles, microfilaments

23
Q

The genetic material in the nucleoplasm of the nucleus is

A

Chromosomes

24
Q

List substances that enter and exit the cell through the cell membrane

A

Oxygen

Carbon oioxide

25
Q

The process that allows the movement of gases and ions from areas of higher concentration to areas of lower concentration until equilibrium has been achieved is

A

Diffusion

26
Q

He process by which substances are moved through the cell membrane by a carrier molecule is

A

Facilitated diffusion

27
Q

The process by which water moves across a semi permeable membrane from areas higher concentration is called

A

Osmosis

28
Q

A hypertonic solution is one that

A

Contains a greater concentration of solute than the cell

29
Q

The process that uses energy to move molecules or ions across a concentration graidient from an area of lower concentration to an area of higher concentration is called

A

Active transport

30
Q

A process that allows cells to take in molecules of solids by surrounding them to create a vesicles is called

A

Phogocytosis

31
Q

The process that ensure duplication of dna molecules during cell reproduction is

A

Mitosis

32
Q

The process used in the formation of the gametes that divides the chromosome number in half is known as

A

Meiosis

33
Q

List four important functions of the plasma membrane

A

Size of molecules
Solubility in lipids
Charge on ions
Presence of carrier molecules

Anatomy And Phys. (5 decks)

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