0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Amphetamines have stimulating effects on the nervous system because they?
release norepinephrine
Amphetamines appear to exert their main effects by altering the release and reuptake of?
dopamine and norepinephrine
Amphetamines increase the release of what four chemicals in your body?
I only know of seratonin, dopamine, and norepinephrine (sp)
How do amphetamines work inside of the brain?
When amphetamines are activated they release something called norepinephrine. It also speeds up the heart and the metabolic process. The metabolic process transforms food to things the body can use.
What chemicals do amphetamines cause your brain to release?
Amphetamine is 1-phenylpropan-2-amine. Amphetamines are drugs that increase levels of the neurotransmitters norepinephrine, serotonin, and dopamine in the brain. They are commonly used as stimulants and appetite suppressants.
Which autonomic neurons release norepinephrine as a neurotransmitte?
Sympathetic postganglionic neurons release norepinephrine,
What effect does amphetamines have on norepinephrine?
Amphetamines are psychostimulant drugs of abuse and include methamphetamine, amphetamine and ecstacy or MDMA. Amphetamine drugs can effect norepinephine in several ways. Initially amphetamine drugs will cause a massive release of all monoamine neurotransmitters (dopamine, serotonin and norepinephrine) from the vesicles inside the presynaptic cleft of a neuron. Furthermore, amphetamine and methamphetamine (not MDMA) are very structurally similar to norepinephrine and can substitute, or move through, the norepinephrine transporter (NET) which regulates the amount of norepinephrine in the synapse. This can lead to dysregulation of the transporter so that it no longer functions properly. This can happen in several ways including internalization of the transporter inside the presynaptic cleft and/or phosphorylation of the transporter, which can essentially shut it off. This means that there is more norepinephrine in the synapse, which can bind to norepinephrine receptors and lead to the subjective (feeling), physiological, behavioral and neurobiological effects of amphetamine drugs.
Preganglionic sympathetic fibers trigger the release of?
epinepherine and norepinephrine
What are norepinephrine releasing fibers called?
Andrenergic fibers release Norepinephrine and Cholinergic fibers release Acetylcholine.
Norepinephrine stimulates the release of which hormone?
growth hormone
Which release norepinephrine?
The answer is sympathetic post-ganglionic axon
Is it true that once the effects of a stimulant wear off the driver could quickly fall asleep?
That is true. Most stimulants work by binding to excitatory neurotransmitter receptors (such as the case with amphetamines), inducing the release of excitatory neurotransmitters (such as dopamine and norepinephrine, in the case of amphetamines), preventing the breakdown of excitatory neurotransmitters (as in the case of Ritalin, cocaine, etc.), or blocking inhibitory receptors (as in the case of caffeine). When this happens, the brain adjusts by reducing its sensitivity to its own excitatory neurotransmitters...especially in the case of adrenaline (epinephrine), noradrenaline (norepinephrine), and dopamine. So, once the stimulant wears off, the body is not only fatigued again, but is actually MORE sleepy than before...making it very easy to fall asleep.
