Flashcards in Chapter 3 Deck (112)
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92
During what phase of the cell cycle does DNA replication occur?
S phase
93
What is the region near the middle of a chromosome that represents the attachment of two arms of a chromosome which are termed chromatids?
The centromere
94
An intravenous solution that is labeled isotonic can be what to a patient?
Hypotonic
95
What has chemicals the direct metabolic processes as well as reproduction?
DNA
96
Two major parts of the cell are the nucleus and the... ?
Membrane
97
Osmotic pressure is a force that what?
Attracts water towards the higher pressure (concentration)
98
Is endocytosis passive or active?
Active
99
True or false: Lysosomes degrade bacteria and worn cells, and can cause disease by destroying normal tissues
True
100
The cristae are the inner portions of that what?
Mitochondria (the mitochondria inner surface is lined with folds called cristae which contain enzymes uned in energy production by sythesis of nucleotides such as ATP)
101
True or false: Smooth endoplasmic reticulum has a significant function in protein sythesis
False (the term smooth is to indicate the absence of ribosomes which are the sites for protein synthesis)
102
What is important for producing the fibers that move the chromosomes during cell division?
Centrioles
103
Filtration occurs when particles are forced through a membrane because of what?
HIgh hydrostatic or water pressure.
104
One mechanism in the skin that prevents cells from becoming loose and separating is the presence of junctions called what?
Desmosomes
105
In biological systems, water pressure is called what?
Hydrostatic pressure
106
At equilibrium there is movement of molecules in all directions, but the concentrations of the particles is what?
The same at all points
107
True or false: Hydrogen peroxide is a chemical toxic to most cells and is produced by some human cells.
True
108
The ability of leukosyted to engulf bacteria is due to the process of what?
Phagocytosis
109
Which of the following human cells do not have a flagellum? Sperm, kidneys, intestine, testes.
Intestine
110
A combination of a sugar with a protein is a what?
Glycoprotein
111
The centriole functions in what?
Cell division
112
A human cell membrane is comprised of the following except which one? Lipids, proteins, carbohydrates, nucleic acids.
Nucleic acids
113
