Autonomic Nervous System Flashcards
What is the name of the reaction that causes your body to move from a state of quietness to that of being frightened
Fight or flight reaction
Which system controls the reflex f or f rxn
The central nervous system
What do the efferent neurons do?
The efferent neurons carry rapid commands from the cns to the muscles and glands of the body through nerves or bundles of axons
These nerves carry sensory information through afferent fibers
Mixed nerves
What’s the difference between the autonomic neurons and the somatic motor neurons
Autonomic neurons control smooth muscle, cardiac muscle, many glands and some adipose tissue and is sometimes called the voluntary division
The somatic motor neurons control skeletal muscles and is sometimes called the involuntary division
The autonomic division is also known as the ____ because of _____.
Visceral nervous system
Because of its control over internal organs
What is the autonomic division divided into
Sympathetic and parasympathetic
Which part of the brain controls sympathetic responses
The hypothalamus
What is the main function of the autonomic nervous system
Controlling involuntary responses
Which 3 centers mainly activate the ans
Hypothalamus
Brain stem
Spinal cord
Which 2 series of neutrons do all autonomic pathways consist of
Preganglion and postganglion
What are the four properties of Walter cannon of homeostasis
- Preservation of the fitness internal environment
- Up down regulation by tonic control
- Antagonistic control
- Chemical signals with different effects in different tissues
Where does the cell body of the preganglion lie
It lies in the intermediolateral horn of the spinal cord
What is ganglion
Ganglion is a cluster of nerve cell bodies that lie outside the cns
How do the two autonomic branches differ
The main differences are
- The pathways’ points of origin
- The location of the autonomic ganglia
Which cranial nerve is the major parasympathetic tract
The vagus nerve
Another name for cranial nerve x
Vagus nerve
Cranial nerve x contains ____ of all ___.
75 % of all parasympathetic fibers
Which 3 rules do we use to distinguish the neurotransmitters and receptors of the sympathetic and parasympathetic branches
- Both sympathetic and parasympathetic preganglionic neurons release acetylcholine (ACh) onto nicotine cholinergic receptors (nAChR) on the postganglionic cell
- Most postganglionic sympathetic neurons secrete norepinephrine(NE) onto adrenergic receptors on the target cell
- Most postganglionic parasympathetic neurons secrete acetylcholine onto muscarinic cholinergic receptors (mAChR) on the target cell
What is the neuroeffector junction
This is the synapse between a postganglionic autonomic neuron and its target cell
what are the two primary neurotransmitters
acetylcholine and norepinephrine
what are the two primary neurotransmitters
acetylcholine and norepinephrine
