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105 Cards in this Set

  • Front
  • Back

What is always present in the ANS?

A synapse between the CNS and the effector organ

Where are post ganglionic neurons of the ANS located?

Autonomic ganglia

Post ganglionic neurons are myelinated or unmyelinated?

Unmyelinated

Why are post ganglionic neurons unmyelinated?

They enter gray ramus

What part of the ANS maintains homeostasis during rest?

Parasympathetic

Where are pre ganglionic neurons of the sympathetic division located?

Lateral gray horn of segments T1 to L2

Another name for the sympathetic division?

Thoracolumbar division

Group of second order neurons of the sympathetic neurons lying along either side of the spinal cord

Sympathetic chain ganglia

Group of second order neurons of the sympathetic division that innervate organs in the abdomino-pelvic region

Collateral ganglia

Another name for collateral ganglia

Pre-vertebral ganglia

Specialized group of second order neurons of the sympathetic division that release epinephrine and norepinephrine into the blood stream are located where?

Adrenal medullae of adrenal glands on the kidney

Post-ganglionic nerve role regarding sweat secretion

Increases

Sympathetic Post-ganglionic nerve role regarding gastric motility

Decreases

Sympathetic Post-ganglionic nerve role regarding blood circulation in the skin

Reduced circulation (vasoconstriction of blood vessels that supply the skin)

Sympathetic Post-ganglionic nerve role regarding skeletal muscle blood vessels

Increased. Vasodilation of blood vessels that supply skeletal muscle)

Sympathetic Post-ganglionic nerve role regarding heart rate

Increased

Sympathetic Post-ganglionic nerve role regarding pupils

Dilation

Sympathetic Post-ganglionic nerve role regarding bronchi

Dilation

What kind of drugs are used to treat an asthmatic patient

Sympathomimetic drugs

Sympathetic Post-ganglionic nerve role regarding metabolism

Increased (catabolism)

Increased metabolism

Catabolism

Parasympathetic nerve role regarding sweat gland

No action

Parasympathetic nerve role regarding gastric motility

Increased (most important role)

Parasympathetic nerve role regarding blood vessels

Vasodilation

Parasympathetic nerve role regarding heart rate

Decreased

Parasympathetic nerve role regarding pupils

Constriction

Parasympathetic nerve role regarding bronchi

Constriction

Parasympathetic nerve role regarding metabolism

Decreased metabolism (anabolism)

Decreased metabolism

Anabolism

The splanchnic nerves are sympathetic/parasympathetic?

Sympathetic

The splanchnic nerves originate where?

Originate from the first order neurons (pre-ganglionic)

The splanchnic nerves are located where?

In lower thoracic, lumbar, and sacral segments of the spinal cord

The splanchnic nerves carry nerves that synapse where?

In the collateral ganglia (Pre-vertebral ganglia)

The splanchnic nerves control sympathetic functions of what organs?

Organs in the abdomino-pelvic cavity

If the splanchnic nerves were injured what organ system would be affected?

Digestive system

What are the three sympathetic ganglia of the sympathetic division?

Sympathetic chain ganglia, collateral ganglia, adrenal medullae

What are the three major collateral ganglia of the sympathetic division?

Celiac ganglia, superior mesenteric ganglia, inferior mesenteric ganglia

The celiac ganglion belongs to what division?

Sympathetic. Specifically the collateral ganglia

Celiac ganglia innervate what organs?

Stomach, liver, gall bladder and pancreas

Another name for the parasympathetic division?

Craniosacral division

Where can the pre-ganglionic neurons of the parasympathetic division be found in the cranium?

Cranial nerves III, VII, IX, and X

Where can the pre-ganglionic neurons of the parasympathetic division be found in the sacrum?

S2-S4 and pelvic nerves (pelvic splanchnic nerves)

Four cranial outflows of post-ganglionic fibers of parasympathetic neurons

Ciliary, pterygopalatine, submandibular, and otic ganglia

Sacral outflow of post-ganglionic fibers of parasympathetic nerves synapse at what organs?

Synapse at intramural ganglion of the rectum, urinary bladder, kidney, and the reproductive organs

Intramural ganglion innervate what organs?

Rectum, urinary bladder, kidney, and the reproductive organs

Splanchnic nerve is sympathetic/parasympathetic?

Sympathetic

Pelvic nerve is sympathetic/parasympathetic?

Parasympathetic

Intramural ganglion is sympathetic/parasympathetic?

Parasympathetic

Pre-ganglionic of intramural ganglion?

Pelvic nerve

Sympathetic activation is controlled by what part of the brain

Sympathetic centers of the hypothalamus

Autonomic plexus definition

A network that contains both sympathetic and parasympathetic nerves

Dual innervation definition

Both sympathetic and parasympathetic nerves in an organ

6 autonomic plexuses

Cardiac


Pulmonary


Celiac


Superior mesenteric


Inferior mesenteric


Hypogastric

Celiac plexus contains what ganglia?

Celiac ganglia

Hypogastric plexus contains what ganglia?

Inferior mesenteric ganglia

Stimulation of alpha-1 receptors by nor-epinephrine would result in the release of what?

Intracellular calcium stores (epsp)

Which neurotransmitter stimulates alpha-1 receptors that results in the release of intracellular calcium stores?

Nor-epinephrine

Nor-epinephrine stimulates which receptor which results in the release of intracellular calcium stores?

Alpha-1

stimulation of the beta-1 receptors on the heart muscle causes the formation of what?

Cyclic AMP

Cyclic AMP is released by the simulation of what receptor?

Beta-1

where are beta-1 receptors found?

The heart

Cyclic AMP has what effect on the heart?

Increases the heart rate and increase the force of cardiac muscle contraction

Stimulation of beta-2 receptors via an inhaler causes what?

Bronchodilation

Beta receptor causes what?

Vasoconstriction

What drug is used to treat hypertension?

Beta-blockers (sympathetic blocking agent)

Drugs that have an effect similar to those of nor-epinephrine?

Sympathomimetic drugs

Sympathomimetic drugs have a similar effect to what?

Nor-epinephrine

Drugs that have a similar effect to those of parasympathetic

Parasympathomimetic drugs

Parasympathomimetic drugs have a similar effect to what?

Parasympathetic

What drugs target muscarinic receptors?

Parasympathomimetic drugs

Where do mushroom toxins bind to?

Muscarine receptors

Act as the main end-receptor stimulated by acetylcholine released from postganglionic fibers in the parasympathetic nervous system

Muscarinic receptors

Muscarinic receptors definition

Act as the main end-receptor stimulated by acetylcholine released from postganglionic fibers in the parasympathetic nervous system

Parasympathetic stimulation causes what in the lungs?

Bronchoconstriction

Toxin from muscarinic mushroom causes what in the lungs

Bronchoconstriction that leads to difficulty breathing

Neurotransmitter that may link to schizophrenia

Dopamine

What neurotransmitter is released in presynaptic facilitation?

Serotonin

Serotonin is released in pre/post synaptic facilitation

Pre

Drugs that block secretion of ____ in the CNS can cause depression

Nor-epinephrine

Drugs that block the secretion of nor-epinephrine in the CNS can cause what?

Depression

What is useful in treating diarrhea?

Parasympathetic blocking agents

Why are parasympathetic blocking agents useful in treating diarrhea?

They block the role of parasympathetic in digestive function

Sweat glands contain what kind of receptors?

Cholinergic

Dual innervation refers to what?

An organ receiving both sympathetic and parasympathetic nerves.

Autonomic tone function

Allows ANS neurons to increase or decrease their activity, providing a range of control options

Function that allows ANS neurons to increase and decrease their activity, providing a range of control options

Autonomic tone

Most post-ganglionic of the sympathetic division release what?

Nor-epinephrine

Only post-ganglionic sympathetic nerves for sweat glands release what?

Acetylcholine

Acetylcholine released in post-ganglionic sympathetic nerves for what?

Sweat glands

Pre-ganglionic sympathetic nerves release what?

Acetylcholine

Both the pre-ganglionic and the post-ganglionic of the parasympathetic release what?

Acetylcholine

Acetylcholine is released in what ANS systems? (specifically, which ganglia)

Post-ganglionic sympathetic nerves for sweat glands, and both pre and post-ganglionic of the parasympathetic

Nicotinic receptors are part of which ANS nerve?

Parasympathetic

How do nicotinic receptors produce an epsp?

Opening sodium channels

Where are nicotinic receptors found?

NMJ. Found in both ANS and SNS

What activates nicotinic receptors

Acetylcholine

Muscarinic receptors are part of which ANS nerve?

Parasympathetic

Muscarinic receptors are EPSP or IPSP?

Both

Muscarinic receptors are activated by what?

Acetylcholine

Where are muscarinic receptors found?

Surface of smooth muscle

Examples of visceral reflexes

Defecation, vomiting, coughing, swallowing, papillary, urination, and ejaculation in response to tactile stimuli

Defecation, vomiting, coughing, swallowing, papillary, urination, and ejaculation in response to tactile stimuli are examples of what kind of reflex?

Visceral reflex

During sleep ____ activity increases and ____ activity decreases

Parasympathetic. Sympathetic.

Increasing activity of parasympathetic division has what effect on the heart?

Heart rate and blood pressure decrease

Increasing of activity of parasympathetic division has what effect on the penis?

Erection due to vasodilation