Chapter Three Lec Flashcards
What is a cell?
A basic unit of life.
What is cytology?
The study of cells.
Spontaneous generation is?
The belief that living things can arise from nonliving things.
Who invented the microscope?
Van Leewenhoek
Where did the origin of the term cell come from?
Hooke
What are the major statements of cell theory? Who came up with the statements?
1) . All living things are composed of cells. —-> Schleiden & Schwann.
2) . All living things come from preexisting living cells. ——> Virchow
Cells are surrounded by an ________ environment?
Aqueous (watery)
Intracellular fluid is?
Inside the cell, and is the cytosol.
Extracellular fluid is?
Inside the body, outside the cell.
It is sometimes called interstitial fluid.
What is the organization of a eukaryotic cell?
Plasma membrane > Nucleus > Cytoplasm
What is in the cytoplasm?
Cytosol & Organelles
Plasma membrane provides?
Structure & Function
What are the general functions of the plasma membrane?
- General separation of ECF, and ICF, and containment.
- Regulation of exchange with the environment (permeability)
- Sensory receptors & markers
- Structural support
What is the general structure of the typical plasma membrane?
It is an active, dynamic structure.
I. Membrane lipids
II. Membrane proteins
III. Membrane carbohydrates
