Chapter 2 Flashcards
Substances that release ions in water
Electrolytes
Electrolytes that release hydrogen into water?
Acids
Electrolytes that release ions that bond with hydrogen ions
Bases
Hydrogen ion concentrations are measured by a value called
PH
The ph scale ranges from 0 to?
14
7 midpoint meaning equal numbers of hydrogen and hydroxide ions. (Neutral).
The ph of the blood ranges from
7.35 to 7.45
What are buffers?
Chemicals that resist pH changes.
Which buffer is important in body fluids?
Sodium bicarbonate
What are the 2 classes of cells in the human body?
Sex cells
Somatic cells (body cells)
What part of the cell contains the cells genetics material and controls it’s activities.
Nucleus
Controls movement of substances both into and out of the cell.
Allows selective communication between the intracellular and extra cellular compartments while aiding the cellular movement.
Cell membrane
Primary substances that make up the cell membrane
Lipids and proteins , usually in a double layer of phospholipid.
What’s diffusion
The process by which substances spontaneously move from regions of higher concentration to regions of lower concentration.
The speed of diffusion is influenced by?
Kenetic energy, molecular size and temp
What is equalibrium?
Once particles have been evenly distributed throughout a substance such as water.
