D-words

Question 1

decremental transmission

Answer 1

electrical signal transmission when signals are conducted with exponentially decreasing amplitude in space

Question 2

denaturation

Answer 2

usually irreversible change in the structure of a protein molecule

Question 3

dendrite

Answer 3

branched projection of a neuron that receives the synaptic input from other neurons and sends it further to the soma

Question 4

depolarization

Answer 4

the part of an action potential when the resting membrane’s potential becomes less negative

Question 5

depressor area (center)

Answer 5

collection of neurons located caudally and medially from the pressor area in the medulla decreasing blood pressure by the inhibition of the pressor area and by the excitation of the vagal efferents running to the heart

Question 6

diaphragm

Answer 6

a thin sheet of muscle under the lungs

Question 7

diastole

Answer 7

the part of the cardiac cycle when the heart relaxes and refills with blood

Question 8

diffusion

Answer 8

movement of atoms or molecules along the concentration gradient

Question 9

dipole

Answer 9

a molecule having separate regions of net negative and net positive charge

Question 10

disaccharide

Answer 10

double sugar molecule formed by two single sugars

Question 11

disulfide linkage

Answer 11

a link between two sulfide groups determining the structure of proteins

Question 12

Donnan equilibrium

Answer 12

electrochemical equilibrium that develops when two solutions are separated by a membrane permeable to only some of the ions in the solution

Question 13

dorsal root ganglion

Answer 13

is a cluster of nerve cell bodies in a posterior root of a spinal nerve

Question 14

dyspnea

Answer 14

labored, difficult breathing