Flashcards in Chapter 3 Deck (112)
During what phase of the cell cycle does DNA replication occur?
What is the region near the middle of a chromosome that represents the attachment of two arms of a chromosome which are termed chromatids?
An intravenous solution that is labeled isotonic can be what to a patient?
What has chemicals the direct metabolic processes as well as reproduction?
Two major parts of the cell are the nucleus and the... ?
Osmotic pressure is a force that what?
Attracts water towards the higher pressure (concentration)
Is endocytosis passive or active?
True or false: Lysosomes degrade bacteria and worn cells, and can cause disease by destroying normal tissues
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)
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)
What is important for producing the fibers that move the chromosomes during cell division?
Filtration occurs when particles are forced through a membrane because of what?
HIgh hydrostatic or water pressure.
One mechanism in the skin that prevents cells from becoming loose and separating is the presence of junctions called what?
In biological systems, water pressure is called what?
At equilibrium there is movement of molecules in all directions, but the concentrations of the particles is what?
The same at all points
True or false: Hydrogen peroxide is a chemical toxic to most cells and is produced by some human cells.
The ability of leukosyted to engulf bacteria is due to the process of what?
Which of the following human cells do not have a flagellum? Sperm, kidneys, intestine, testes.
A combination of a sugar with a protein is a what?
The centriole functions in what?
A human cell membrane is comprised of the following except which one? Lipids, proteins, carbohydrates, nucleic acids.