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Flashcards in Chapter 3 Deck (112)
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62

What stage occurs when two daughter cells have completely formed?

Telophase (the last stage)

63

True or false: Vesicles can form for things leaving a cell as well as entering?

True

64

What kind of proteins in a membrane function as enzymes?

Peripheral. (They line the inner surface of the cell membrane.)

65

What is bound by two layers of membrane called the nuclear envelope?

The nucleus

66

During aging or apoptosis, the structure and dunction of the organelles and chromosomes undergo many what?

Degenerate changes

67

Hormones come in contact with what kind of molecules in a membrane?

Rod-like protein molecules

68

Osmosis is considered a special case of diffusion and is what in nature?

Passive

69

Cancer cells can disseminate to other areas by a process called what?

Metastasis

70

What contains membranes that are able to condense molecules into packages that can be transported?

Golgi aparatus

71

The process that results in daughter cells with half of the original chromosome number is what?

Meiosis

72

Which of the following are the smallest cells? Human ovum, red blood cel, white blood cell, smooth muscle cell.

Red blood cell. (It is 7.5 micrometers in diameter.)

73

Two chromatids are attached at what region?

The centromere region

74

What determines the function of a cell?

The structure

75

The following molecules freely pass through a cell membrane except which one? Oxygen, carbon dioxide, amino acids, certain lipids.

Amino acids

76

What is a general process of nuclear division called?

Karyokinesis

77

DNA can be found within chromosomes during division but prior to division DNA exists as long thin stands of what?

Chromatin

78

Only proteins have the ability to what?

Recognize another molecule

79

In what part of the nucleus does ribosome production occur?

In the area of the nucleolus

80

Membranous sacs that contain fluids or particles for transport are called that what?

Vesicles

81

In biological systems, water is the what?

The solvent

82

The cells in a heart muscle are often held together by areas called what?

Gap junctions

83

What is the term for chemical particles in a cell which appear lifeless and have no obvious function?

Inclusion

84

What is the organelle that plays a complex function in cell respiration?

Centriole. (Each centrosome organelle is comprised of two centrioles)

85

True or false: a selectively permeable membrane allows proteins to pass through?

True

86

The main division process in the early embryo is called what?

Mitosis

87

Membranes that have a higher osmotic pressure on one side tend to do what?

Draw water towards that side

88

The following belong together except which one? Microtubule microvilli, aid in DNA movement, comprise an internal skeleton.

Microvilli (they are simple columnar cells specialized for absorption)

89

Chromatin is DNA and histone proteins arranged in what?

Strands

90

What is the most critical factor in determining its function?

Shape

91

In the liver, what may play a role in producing the enzymes that help detoxify drugs?

Smooth endoplasmic reticulum (it normally produces peroxisomes, which are likely to decompose toxins)