Glossary of terms used on this site

feather specialized for insulation

a decrease in the number of hormone receptors in response to increased hormone levels

nucleotides following the initiation site in the direction of mRNA transcription; in general, sequences that are toward the 3' end relative to a site on the mRNA

first part of the small intestine where a large part of digestion of carbohydrates and fats occurs

tough outermost layer that covers the central nervous system