B-words Flashcards
Baroreceptor reflex
reflex mechanism that starts from baroceptors in the carotid sinus and aortic arch that regulates blood pressure
Basal myogenic tone
when muscular vessels contract in response to an increase in blood pressure to prevent an increase in blood flow (arterioles)
Basophil granulocyte
WBCs containing vesicles stained by basic stains
Beta sheet
two dimensional secondary structure of proteins stabilized by hydrogen bonds between peptide bonds on chain segments running in opposite directions
Bilirubin
end product of heme metabolism during the normal destruction of RBCs
Biogenic amines
signaling molecules synthesized in the body from amino acids by decarboxylization
Bipolar neuron
neuron with two processes fulfilling the same function
Blood-brain-barrier
mechanism controlling the transport of materials from the blood to the extracellular space of the brain
Bronchiole
tiny branch of air tubes without cartilage
Bundle of His
collection of heart muscle cells specialized for electrical conduction