General Physiology Flashcards
What is the main ion concentration found on the inside of a cell?
K+
What is the main ion concentration found on the outside of a cell?
Na+
Na/K+ ATPase pumps help alter membrane potential by pumping….
3Na+ out for every 2 K+ that enter the cell»this counterbalances the leakage of K+ into the cell
What happens to the cell when there is Depolarization?
inside of the cell becomes more (+)–due to INFLUX of Na+
What is Hyperpolarization of the cell?
Inside of cell becomes less (+) due to Na+ leaving the cell
What effect does Hydroxyamphetamine have on NE?
increases release of NE
What effect does Cocaine have on NE?
blocks re-uptake of NE
What do Nicotinic receptors do?
Opens Na+ and K+ channels, causing depolarization
Where are Nicotinic receptors found?
motor end plates of skeletal muscles, postganglionic neurons, within the ganglia of sympathetic and parasympathetic nervous systems, and the adrenal medulla
What type of transport is Diffusion?
movement of ions from high to low concentration»form of passive transport»does not use ATP!
What can cross through the cell membrane during simple diffusion?
Small molecules and inorganic ions»steroids and other lipids pass directly through the phospholipid bilayer
How many lobes in the right lung?
3 lobes
How many lobes in the left lung?
2 lobes
