Bio 161- Anatomy & Physiology, Dehart ,
Exam 1 Questions And Answers With
Verified Solutions Already Passed!!!
Atoms are made out of.. - ANSWER✔✔ subatomic particles
Protons, electrons, neutrons
Atomic number - ANSWER✔✔ Elements are identified by the number of protons
Neutral atoms have the same # of ..... and ..... - ANSWER✔✔ Protons & Electrons
Ions are atoms that have uneven # of? - ANSWER✔✔ Protons & Electrons
Ionization - ANSWER✔✔ The process of neutral atom gaining or losing an
electron
Voltage - ANSWER✔✔ Separation of charge
Current - ANSWER✔✔ Flow of charged particles
Molecules - ANSWER✔✔ Consists of multiple atoms that associate with each
other through bonds. They can be neutral, polar, or charged (ions)
FOUR primary categories of organic molecules - ANSWER✔✔ Carbohydrates,
lipids, proteins, nucleic acid
Monomer - ANSWER✔✔ Single molecular unit of polymer
Polymer - ANSWER✔✔ Molecules containing many repeating molecular units
(monomers)
Examples of carb monomers? - ANSWER✔✔ Glucose & Fructose
Examples of Carb polymers (of glucose monomers)? - ANSWER✔✔ Starch,
cellulose, glycogen (carb storage of animals)
, Solution - ANSWER✔✔ Homogenous mixture of at least two substances
Liquid where solutes are dissolved in a solvent
Types of transport of molecules - ANSWER✔✔ Active & Passive
Concentration gradient - ANSWER✔✔ Movement of particles from high to low
concentration
Is diffusion active or passive transport - ANSWER✔✔ Diffusion is an example of
passive transport
Active transport - ANSWER✔✔ -requires energy
-molecules move up the concentration gradient
Passive transport - ANSWER✔✔ -no energy
-molecules move down the concentration gradient
Types of diffusion - ANSWER✔✔ simple and facilitated
Simple diffusion - ANSWER✔✔ molecules pass directly through the plasma
membrane without the assistance of another molecule
Oxygen and gasses past through fast!
Facilitated diffusion - ANSWER✔✔ Need help through a protein channel
Protein channel comes in different forms
(Channel mediated diffusion and carrier mediated diffusion)
Types of channel protein - ANSWER✔✔ Channel mediated diffusion & Carrier
mediated diffusion
Channel mediated diffusion - ANSWER✔✔ -molecules move through a channel
protein ( little ones/ specific)
- channel proteins are required
Ex: Ions would pass
Carrier mediated diffusion ( passive) - ANSWER✔✔ -solute must bind carrier
protein
-requires structural change of carrier protein
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