Class Notes (838,950)
Canada (511,158)
BIOL 1000 (60)
Lecture 18

BIOL 1000 Lecture 18: Lecture 18

3 Pages
Unlock Document

Biological Sciences
BIOL 1000
Kevin G.Scott

o982 Cells expend energy in the active transport of a solute Active transport = a cell must expend energy to move a solute against its concentration gradient  o Across a membrane towards the side where the solute is more concentrated Energy molecule ATP directly/indirectly supplies the energy for most active transport  1. Solute molecules on cytoplasmic side of plasma membrane attach to specific binding sites on the  transport protein 2. ATP transfers a phosphate group to the transport protein  3. Causes the protein to change shape in a way that the solute is released on the other side of the  membrane 4. Phosphate group detaches and transport protein returns to original shape Active transport allows a cell to maintain internal concentrations of small molecules/ions that are different from concentrations in its surroundings  + + o Inside of animal cell has higher concentration of K and lower concentration of Na than the solution outside the cell  o 70% of the brains energy consumption is accounted for by continuously operating the sodium potassium pump 5.9 Cells transform energy as they perform work Forms of energy: o Energy = the capacity to cause change or perform work o Kinetic energy = energy of motion Heat/thermal energy = type of kinetic energy associated with random movements of atoms/molecules o Light is also a type of kinetic energy – powers photosynthesis o Potential energy = energy that matter poss
More Less

Related notes for BIOL 1000

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.