Block B: Drugs On The ANS And Heart Flashcards
ANS stands for
Autonomic nervous system
ANS conducts
Action potentials from CNS to cardiac muscles, smooth muscle and glands
Parasympathetic
Close or within target organs
Sympathetic
Close to spinal cord
The neurotransmitter at all autonomic ganglia is
Acetylcholine
The neurotransmitter at most sympathetic neuroeffector junctions is
Noradrenaline (Norepinephrine)
The neurotransmitter at all parasympathetic neuroefector junctions is
Acetylcholine
What are Catecholamines
act both as neurotransmitters and hormones vital to the maintenance of homeostasis through the autonomic nervous system.
CNS is connected to the
PNS through both Afferent and Efferent Neurons
Somatic nervous system
Conducts action potential from the CNS to Skeletal muscle
Afferent nerves
Sensory nerves conducts impulses from receptors to CNS
Efferent nerves
Conducts action potential from CNS to effectors (Muscle and glands)
Sympathetic nervous system is an
Emergency system. The fight or flight reaction
Parasympathetic nervous system is under
Non stressful conditions. Effects predominate during the rest and repair
Parasympathetic systems can
Slow heartbeat and promotes digestion and gland secretion
ANS consists of
Parasympathetic and sympathetic divisions
The autonomic nervous system receptors act as
on/off buttons that control the various sympathetic and parasympathetic effects in the body.
What are the receptors of the ANS?
GPCRs. One example is an ion channel receptor (Nicotinic)
ANS receptors meditate the action of released
Transmitters: acetylcholine, Noradrenaline, adrenaline and so
ANS receptors: Acetylcholine
Nicotinic (ligand gated ion channel) and muscarinic (G-protein coupled receptors)
ANS receptors: noradrenaline
Alpha and beta adrenoceptors