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Bio105 Chapter 5 > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

What is in a main cellular structure?

A

Plasma membrane
Cytoplasm (inside organelles)
Nucleus

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2
Q

Plasma membrane functions

A

Boundary of cell
Self identification
Receptor sites

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3
Q

Functional characteristics of ribosomes

A

Protein synthesis

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4
Q

Production of ATP occurs within which organelle?

A

Mitochondria

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5
Q

Production of ATP occurs within which organelle?

A

Golgi apparatus

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6
Q

In nondividing cells DNA appears as threads that are referred to a

A

Chromotin

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7
Q

The nucleolus is composed chiefly of:

A

rRNA

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8
Q

The plasma membrane can be described as a triple layer of phospholipid molecules.

T/F

A

False

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9
Q

The process by which cells translate the signal received by a membrane receptor into a specific chemical change in the cell is called signal transportation .

T/F

A

True

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10
Q

Each and every cell always has one nucleus.

T/F

A

False

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11
Q

Generally, the more active a cell is, the more mitochondria it will contain.

T/F

A

True

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12
Q

Membranous bags that temporarily contain molecules for transport or later use are known as peroxisomes.

T/F

A

False

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13
Q

forms ribosomes

A

nucleolus

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14
Q

separates the cell from its environment

A

plasma membrane

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15
Q

acts as the cell’s “digestive system”

A

lysosome

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16
Q

acts as a “protein factory”

A

ribosome

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17
Q

contains organelles

A

Cytoplasm

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18
Q

contains DNA

A

Nucleus

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19
Q

act as “power plants” of the cell

A

Mitochondria

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20
Q

classified as both smooth and rough

A

Endoplasmic reticulum

21
Q

________________________ is the cell’s internal supporting framework.

A

Cytoskeleton

22
Q

_________________________ are the smallest cell fibers.

A

Microfilaments

23
Q

The thickest of the cell fibers are tiny, hollow tubes called _______________________.

A

Microtubules

24
Q

The __________________________ is an area of the cytoplasm near the nucleus that coordinates the building and breaking of microtubules in the cell.

A

Centrosome

25
Q

_________________, __________________, and ____________________ are cell extensions that appear on certain types of cells.

A

Microvilli, cilia, flagella

26
Q

When membrane channels of adjacent plasma membranes connect to others, the formation is known as __________________ _______________________.

A

Gap Junctions

27
Q

____________________________ hold skin together.

A

Desmosomes

28
Q

Brian is a sedentary, overweight cigarette smoker who has chest pain whenever he exerts himself. Upon examination, his cardiologist determines that Brian is suffering from heart disease. Which receptors in the cells that line the blood vessels of his heart are responsible? What type of cholesterol is responsible?
What other diseases may he be at risk for?

A

a) CD36 (b) LDL (c) stroke, diabetes, cancer, muscular dystrophy

29
Q

After several weeks of exercising in the weight room, Valerie notices that she has not only become stronger, but quite muscular as well. Which organelle has increased its density in the cytoplasm of the cells of her muscles in response to a greater demand for ATP production?

A

Mitochondria

30
Q

Which of the following cellular extensions are required when absorption is important?

A

microvilli

31
Q

Movement of the ovum within the female reproductive tract is largely as a result of:

A

the cilia lining the uterine tubes.

32
Q

Skin cells are held tightly together by:

A

desmosomes

33
Q

Ribosomes are attached to:

A

rough endoplasmic reticulum.

34
Q

The phospholipid area of the plasma membrane of a cell is:

A

bilayered

35
Q

detect changes in the environment

A

nerve cells

36
Q

contract for movement

A

muscle cells

37
Q

transport oxygen

A

red blood cells

38
Q

release hormones

A

Gland cells

39
Q

destroy bacteria

A

Immune cells

40
Q

A typical, or ___________________________, cell exhibits the most important characteristics of cell types.

A

Composite

41
Q

________________________________ is the term meaning “water-loving.”

A

Hydrophilic

42
Q

________________________________ is the process that allows a message to be carried across a membrane.

A

Signal transduction

43
Q

__________________________________ detoxify harmful substances that enter cells.

A

Peroxisomes

44
Q

The _______________________________ is one of the largest cell structures and occupies the central portion of the cell.

A

Nucleus

45
Q

Embedded within the phospholipid bilayer of the cell membrane are a variety of __________ ___________ ___________.

A

Integral membrane protein

46
Q

Peroxisomes are small membranous sacs containing enzymes that detoxify harmful substances that enter the cell.

T/F

A

True

47
Q

Dynein, myosin, and kinesin are examples of proteasomes.
T/F

A

False

48
Q

Microfilaments serve as “cellular muscles.”

T/F

A

True

49
Q

All cells contain thousands of ribosomes.
T/F

A

True

Bio105 Chapter 5 (4 decks)

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