N-words

Question 1

NAD

Answer 1

nicotinamide adenine dinucleotide, a coenzyme

Question 2

Nernst equation

Answer 2

equation for calculating electrochemical equilibrium conditions

Question 3

neurit

Answer 3

processes of neuronal cells

Question 4

neurocrine communication

Answer 4

when the signal reaches the target cell through the synaptic cleft

Question 5

neuromodulator

Answer 5

signal molecule changing neuronal functions; it usually has a broader and longer lasting effect than the neurotransmitters

Question 6

neuromuscular endplate

Answer 6

synapse between the motoneuron and the muscle fiber

Question 7

neurotransmitter (mediator)

Answer 7

signal molecule interacting with receptors in the postsynaptic membrane and usually modifying the membrane potential of the postsynaptic cell

Question 8

neutrophil granulocyte

Answer 8

WBC containing vesicles stained by neutral stains

Question 9

nicotinic acetylcholine receptor

Answer 9

ACh receptor at which nicotine mimics the effect of acetylcholine

Question 10

Nissl substance

Answer 10

characteristic component of nerve cells corresponding to rough endoplasmic reticulum

Question 11

node of Ranvier

Answer 11

one of the regularly spaced interruptions of the myelin sheath between two Schwann cells along an axon

Question 12

non-covalent bonds or weak forces

Answer 12

supplemental, but important interactions between and within biological molecules: electrostatic (ionic) bond, H-bond, van der Waals interaction

Question 13

nonpolar (hydrophobic, lipophilic)

Answer 13

substance lacking completely or partially separated charges that can be dissolved in lipids

Question 14

nucleoside

Answer 14

similar to nucleotide, but contains no phosphate group

Question 15

nucleotide

Answer 15

organic molecules that serve as the monomers, or subunits, of nucleic acids like DNA and RNA (nucleoside + a phosphate group = nucleotide)