Phys Ch10,11 Exam2

Conversion of stimulus energy into electrical energy; chg in mem potential in response to a stimulus acting on a sensory receptor by opening or closing ion channels

Components of a sensory unit

Decrease in amplitude of receptor potential over time in presence of constant stimulus which causes decrease in frequency of action potentials (decreases perception of a stimulus)

What is primary function of autonomic nervous system?
What are it's 2 branches?
Is it afferent or efferent branch of nervous system?

The ___ nervous system is "rest and digest" state; increased GI activities; decrease bp & hr

The ___ nervous system is "fight or flight" state; mobilizes energy stores; decrease GI function

Most effector organs are innervated by _____ ANS

Primary NT of parasympathetic nervous system

Primary NT of sympathetic nervous system

How many neurons are involved in the autonomic pathway b/w CNS and organs to which it effects? (effector organs)

Preganglionic neuron is ___ and postganglionic neuron is ___.
(cholinergic or adrenergic)

Axon swellings which contain stored NTs

Synpase b/w postganglionic neuron and effector organ

Diff b/w process of releasing NTs normally in a synapse, and at neuroeffector junctions

Somatic Nervous System:
Organ controlled?
Voluntary or involuntary control?
Neurotransmitter?
Neurotransmitter receptor?
Number of neurons in pathway & where
pathway runs?

One motor neuron plus all of the muscle fibers it innervates

Does one neuron innervate multiple muscle
fibers?

Does one muscle fiber have multiple neurons
innervating it?

Synapse b/w a motor neuron and a muscle fiber