anatomy lecture 5 exam
Which of the following best describes why the sympathetic division has short pre-ganglionic fibers
* sympathetic ganglia are often closer to the spinal cord
Where is the origin of the pre ganglionic fibers in the sympathetic nervous system
*originate in the lateral horns of the 12 thoracic and the first 2 or 3 lumbar segments of the spinal cord.
Your sense of taste employs___ receptors
*taste buds
Which of the following statement is true about the parasympathetic nervous system?
-The post-ganglionic synapse is found near the target organ - Pre-ganglionic neurons are considered "craniosacral" because of the organ in the spinal cord
There are several key differences in the reflex pathways of the somatic and autonomic systems. Select all of the true statements
-muscles are only in the somatic reflex -interneurons are only in the somatic reflex
Which of the following is not an area where ANS neuronal cells originate?
-primary motor cortex
What nervous system branch uses 1 motor neuron to send signals
Somatic
Which branch of the peripheral nervous system targets skeletal muscle
Somatic
About 90% of the parasympathetic fibers are located in which cranial nerve?
X
What neurotransmitter is secreted by a post ganglionic nerve fiber?
acetylcholine
The term cholinergic refers to synapses that use acetylcholine as a neurotransmitter to communicate between neurons. Which of the nervous system branches contains cholinergic synapse
autonomic nervous system
Which nervous system acts as though it has an "on/off" switch?
autonomic nervous system
Which system reaches a broader range of cells and impacts function in a greater number of areas within the body?
autonomic nervous system
which nervous system acts as though it has an "on/off" switch
autonomic nervous system
True or False. Since the autonomic nervous system originates in the brain stem and spinal cord it is part of the central nervous system?
false
Which of the following statement is true of the parasympathetic nervous system?
fibers emerge from the brain and the sacral portion of the spinal cord
When body temperature drops, an integration center in the brain initiates a physiological response to increase body temperature. This is an example of
negative feedback
The post-ganglionic neuron in the parasympathetic nervous system is an excitable cell therefore it has
nicotinic
which type of receptors cause a change of flow of ions
nicotinic
which type of receptors are found on target cells of the parasympathetic nervous system?
nicotinic and muscarinic
Which branch of the nervous system has its ganglion located near the effector organ
parasympathetic nervous system
Which of the following receptor type responds to light
photoreceptor
The somatic and autonomic reflex pathways both consist of three neurons. Choose 2 neurons that apply to the autonomic reflex ONLY
pre-ganglionic and post-ganglionic neuron
In p general, sensory receptors become less sensitive over time when a constant stimulus is applied. Which term below describes this principle of sensory receptors.
sensory adaptation
What is the effector organ of the somatic nervous system?
skeletal muscle
What nervous system branch uses 1 motor neuron to send signals?
somatic
What branch of the nervous system only has an excitatory response
somatic nervous system
which of the following is a feature specific to the autonomic nervous system
sympathetic chain ganglia
Increases heart rate would be a response of which division of the autonomic nervous system
sympathetic nervous system
norepinephrine is an adrenergic neurotransmitter that can be found at the neuromuscular junction of effector tissues in which branch of the nervous system
sympathetic nervous system
which of the following branches of the autonomic nervous system activates the fight of flight
sympathetic system
Which of the following is not true of the sympathetic nervous system?
the ganglia are close to the effector
Some pre ganglionic fibers in the parasympathetic division of the autonomic nervous system originate in the sacral region of the spinal cord. True or false
true
