R,O,Q-words Flashcards Preview

Anatomy definitions > R,O,Q-words > Flashcards

Flashcards in R,O,Q-words Deck (11):
1

refractory period

period during and immediately after an AP when the membrane can not be excited, or has an elevated threshold

2

repolarization

the part of an AP when the environment within the cell goes back to negative, followed by a hyperpolarization

3

residual volume

amount of air left in the lungs after maximum expiration

4

respiratory cardiac arrhythmia

how breathing can effect the sinus rhythm, during inhalation heart rate increases, during exhalation heart rate decreases

5

resistance vessel

small vessel that contributes significantly to the creation of resistance to blood flow

6

quantal release

when transmitter substances are released in small packages (quanta) from the synaptic terminal

7

quaternary structure of proteins

spatial arrangement of peptide chains and non-peptide components of a protein

8

obligodendrocytes

glia cell in the central nervous system forming myelin sheet around axons passing through its vicinity

9

osmosis

diffusion of water; water is moving through the membrane from the more diluted solution toward
the more concentrated solution following its concentration gradient

10

output of the heart

blood volume pumped by the heart into the circulation in one minute

11

overshoot

part of the action potential when the membrane potential is positive