R,O,Q-words

Question 1

refractory period

Answer 1

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

Question 2

repolarization

Answer 2

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

Question 3

residual volume

Answer 3

amount of air left in the lungs after maximum expiration

Question 4

respiratory cardiac arrhythmia

Answer 4

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

Question 5

resistance vessel

Answer 5

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

Question 6

quantal release

Answer 6

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

Question 7

quaternary structure of proteins

Answer 7

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

Question 8

obligodendrocytes

Answer 8

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

Question 9

osmosis

Answer 9

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

Question 10

output of the heart

Answer 10

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

Question 11

overshoot

Answer 11

part of the action potential when the membrane potential is positive