BIO 156 - Lab Exam 1: Microscopy and
Biological Hierarchy (Rio Salado College)
The pH of the fluid in the stomach is approximately 4 while plain water has a pH of ______. This
means that the fluid in the stomach contains more ________ than water. 7 / hydrogen
ions
passive transport Requires NO energy, Movement of molecules from high to low
concentration, Moves with the concentration gradient
Solvent the substance in which the solute dissolves (water)
Solute the substance that is dissolved
Solution A mixture that forms when one substance dissolves another.
Diffusion the movement of materials from an area of high concentration to low
concentration
facilitated diffusion process of diffusion in which molecules pass across the membrane
through cell membrane protein channels
, active transport Energy-requiring process that moves material across a cell membrane
against a concentration difference (move from low concentration to high concentration)
Which solutes in the lab were able to diffuse across the dialysis tube and why? NaCl &
Na2SO4; the molecules were small enough to diffuse
Which solutes in the lab were NOT able to diffuse across the dialysis tube and why?
Albumin & Starch; the molecules were too large to diffuse
Surface area of a cube length x width x 6
Volume of a cube length x width x height
Surface area to volume divide surface area by volume
Hierarchy of matter in living things: Atoms (tiniest thing any living organism is made up
of)
Molecules
Macromolecules (proteins, fats, carbs)
Organelles (nucleus, etc)
Cells
Tissues
Organs
Biological Hierarchy (Rio Salado College)
The pH of the fluid in the stomach is approximately 4 while plain water has a pH of ______. This
means that the fluid in the stomach contains more ________ than water. 7 / hydrogen
ions
passive transport Requires NO energy, Movement of molecules from high to low
concentration, Moves with the concentration gradient
Solvent the substance in which the solute dissolves (water)
Solute the substance that is dissolved
Solution A mixture that forms when one substance dissolves another.
Diffusion the movement of materials from an area of high concentration to low
concentration
facilitated diffusion process of diffusion in which molecules pass across the membrane
through cell membrane protein channels
, active transport Energy-requiring process that moves material across a cell membrane
against a concentration difference (move from low concentration to high concentration)
Which solutes in the lab were able to diffuse across the dialysis tube and why? NaCl &
Na2SO4; the molecules were small enough to diffuse
Which solutes in the lab were NOT able to diffuse across the dialysis tube and why?
Albumin & Starch; the molecules were too large to diffuse
Surface area of a cube length x width x 6
Volume of a cube length x width x height
Surface area to volume divide surface area by volume
Hierarchy of matter in living things: Atoms (tiniest thing any living organism is made up
of)
Molecules
Macromolecules (proteins, fats, carbs)
Organelles (nucleus, etc)
Cells
Tissues
Organs
