Block B Flashcards
Drugs on the ANS and the heart
What neurotransmitter is found at most sympathetic neuroeffector junctions
noradrenaline
What neurotransmitter is found at all parasympathetic neuroeffector junctions
acetylcholine
What purpose does afferent nerves hold?
conducts impulses from receptors to CNS
What purpose does efferent nerves hold?
conducts impulses from CNS to effectors
What 2 systems do efferent nerves sent impulses through, name and explain there function.
The autonomic nervous system, responsible for involuntary motor actions. the somatic nervous system, responsible for voluntary motor movements.
What neurotransmitter is found at all autonomic ganglia neuroeffector junctions
acetylcholine
Briefly describe the synthesis of noradrenaline and adrenaline (catecholamines)
tyrosine-dopa-dopamine-noradrenaline-adrenaline
What is the main receptor in the ANS
G-protein coupled reaction
Name 5 functions of the cardiovascular system
transport of nutrients, removal of waste products, hormonal control, temperature regulation, defence of host system
What is the name of the inner surface of wall that contacts the blood
endocardium
What is the name of the walls of the heart
myocardium
What is the fluid filled membranous sac that the heart is located in called
pericardium
What is the effect that sympathetic fibres have on the heart, how and via what neurotransmitter
increases HR, through increasing permeability of Na+ and Ca+, via noradrenaline
What is the effect that parasympathetic fibres have on the heart, how and via what neurotransmitter
decreases HR, through decreasing permeability of Na+ and Ca+, via acetylcholine
Low intensity aerobic ______ mitochondria
increases
