Bio 1500 - Exam 1 (Mizzou-Bush) Questions
With Correct Answers.
The passive movement of molecules - answer✔✔diffusion
what type of thermal movements is diffusion driven by? - answer✔✔Brownian
characteristics of individual molecules? - answer✔✔-random, unpredictable motion
-not directed to low concentration
-never stops
characteristics of the net movement of all molecules? - answer✔✔-is predictable
-directed from high to low concentration
-stops when it reaches equilibrium
how does the diffusion time change with the distance traveled? - answer✔✔diffusion time
increases with the square of the distance
[EXAMPLE] 2x distance equals.... - answer✔✔4 fold time
[EXAMPLE] 10x distance equals.... - answer✔✔100 fold time
diffusion works great within what types of cells? except for which cells? - answer✔✔-within
cells that lengthen between 1-100 micrometers
-doesn't work good within axons
the capacity to do work or cause motion - answer✔✔energy
two types of energy? - answer✔✔kinetic & potential
energy due to motion; includes heat, light, and electricity - answer✔✔kinetic energy
stored energy due to position; includes chemical energy in bonds - answer✔✔potential energy
what is the First Law of Thermodynamics? - answer✔✔energy can neither be created nor
destroyed, but can change from one form to another
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