Week 2 Flashcards
What potential is the difference in charges between the intra and extracellular body
The membrane potential
What net charge is the cytoplasm (intracellular)
Negative
What charge is the extracellular fluid
Positive
If the intracellular cytoplasm becomes more positive past and past the point of ____ and the action potential begins
The threshold of excitation
The process of reobsorbtion of neurotransmitters is called what
Reuptake
Psychoactive drugs that mimic a neurotransmitter at the receptor site is called a what
Agonist
Psychoactive drugs that block or impedes the normal activity of a beurotransmitter are called what?
Antagonists
Psychoactive agonists drugs-
Mimic a beurotransmiiter
Psychoactive Antagonists drugs-
Block or impede neurotransmitters
what are ions
atoms or molecules that have gained a charge from either gaining or losing an electron.
what are anions
negatively charged ions such as chloride (Cl-)
what are cations?
positively charged ions such as sodium, potassium or calcium
proteins are ____ charged?
negatively
when polarized the cell?
when the membrane is in a state of more negative then positive
what is depolarization?
when the mebrane potential starts to become less negative
what is hyperpolarization?
when the cell becomes even more negative than the outside
what are the three ways ions move
diffusion, diffusion through a semi-permeable membrane and electrostatic force
what are the 3 ways ions move?
diffusion, diffusion through a semi-permeable membrane and electrostatic force
excitatory neurons do what to the membrane?
depolarize it
what do inhibitory neurons do the cell membrane?
hyperpolarizes it.
what are the two different types of receptors?
ionotropic and metabotropic receptors
