Flow within cells: Potential energy and kinetic energy Flashcards
1
Q
What is potential energy?
A
energy in the stored form
- can be released and harnessed to perform work
- body has huge reserves of PE
2
Q
Where is PE stored?
A
chemical bonds
chemical gradients across cell membranes
PE in electrochemical gradients
3
Q
What is electrogenic?
A
generating an electrical gradient
4
Q
What is membrane potential?
A
movement of ions down electrochemical gradient
5
Q
What is current flow?
A
localised changes in membrane voltage
6
Q
What does phosphorylation do?
A
higher Potential energy conformation
higher elastic energy
7
Q
Elastic energy- mechanical energy movement between macromolecular states
A
- ATP binds to Myosin to put it in High Energy State (Elastic Energy)
- Myosin binds too Actin site when exposed- loses ADP AND P- Mechanical energy
- Myosin Head moves back to lower energy conformation- ‘Mechanical Energy’
