Anatomy & Physiology 1 (BIOL 2401) Chapter 3 Flahcards

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Cards In This Set

Front Back
Most of the earth's residents are _______. The most ancient and abundant are the _________.
Unicellular, bacteria
What are the 3 main types of microscopes?
Light, transmission electron, scanning electron
What is the cell theory?
New cells are formed from other existing cells, and that the cell is a fundamental unit of structure, function and organization in all living organisms.
Cellular activity is both individual and ________
Collective
Cell activity is dictated by _______________
Sub-cellular structures
Continuity of life has _________ basis.
Cellular
Humans are composed of about __________ cells.
70 trillion
Know the fluid mosaic model.
Answer 8
Fluid Mosaic Model
Review membrane proteins
Answer 9
Membrane Proteins
Know the membrane junctions
Answer 10
Membrane Junctions
How does membrane transport work?
Answer 11
Membrane Transport
Passive transport means
Moving biochemicals and atomic or molecular substances across the cell membrane.
What are the 4 main types of passive transport?
1) osmosis
2) simple diffusion
3) facilitated diffusion
4) filtration
What is osmosis?
It is the movement of water across a partially permeable membrane from an area of low solute concentration to an area of high solute concentration. It is a physical process in which a solvent moves, without input of energy, across a semipermeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations.

Water follows "stuff", usually salt.
What is simple diffusion?
The net movement of substances from a region of high concentration to a region of low concentration so its overall net movement is along the concentration gradient. Substances are diffused across the membrane between the phospholipids