Module 10 Nervous System and Control of Ventilation Flashcards
Both the somatic nervous system (SNS) and autonomic nervous system (ANS) include components in the CNS and PNS.
what are two ways the somatic nervous system conduct information?
Somatic sensory pathways conduct toward integrators in the CNS (Information)
Somatic motor pathways conduct information towards somatic effectors. (response)
Both the somatic nervous system (SNS) and autonomic nervous system (ANS) include components in the CNS and PNS.
what are pathways for the ANS?
Visceral sensory pathways conduct information toward CNS integrators
Sympathetic AND parasympathetic pathways conduct information toward autonomic effectors.
Efferent vs Afferent?
Efferent = away
Afferent = towards
Central nervous system (CNS)
Brain + Spinal Cord
integrates sensory information, evaluates it, and initiates an outgoing response.
Peripheral nervous system (PNS)
Cranial nerves originate from the brain (12)
Spinal nerves originate from the spinal cord (31)
Basically the relay point for the CNS
Somatic Nervous System
Consists of somatic motor (efferent) and somatic sensory (afferent) divisions.
Motor: towards effectors (skeletal muscles)
Sensory: feedback to CNS
What nerves innervate the respiratory system?
Phrenic nerves
Intercostal nerves
Phrenic nerves
C3-C4-C5
Injuries in this region can paralyze the diaphragm
What does innervate mean?
To supply with nerves, or to stimulate nerves/organs
ANS major function
To regulate heartbeat, smooth muscle contraction, and glandular secretions to maintain homeostasis
ANS = Involuntary
2 divisions of the ANS
Sympathetic nervous system
Parasympathetic nervous system
Both are efferent.
Sympathetic nervous system
Prepares the body to deal with immediate threats to the interval environment;
Produces the flight or flight response
parasympathetic nervous system
coordinates the body’s normal resting activity’s;
Rest and repair
West zones of the lung: zone 1
Where alveolar pressure is higher than arterial or venous pressure
West zones of the lung: zone 2
Where arterial pressure higher than alveolar and venous, a relationship that changes during the respiratory cycle
West zones of the lung: zone 3
where both arterial and venous pressure is higher than alveolar
Excitable cells do what?
Initiate and conduct impulses that make nervous system function
Cell body: what are 2 main functions?
1.provide proteins for maintaining and regenerating
nerve fibers
- Provide protein muscles (neurotransmitters) needed for transmission of nerve signals from one neuron to another.
Neurotransmitters are packed into?
Vesicles.
Structure of a typical neuron (an image)
Two types of signals transmitted at the Synapse from one to another
Electrical and Chemical
Which synaptic transmission uses action potentials to directly between cells?
Electrical
How do Chemical synapses work?
Neurotransmitters (chem signals) are sent across a tiny gap to postsynaptic cells which induces action potentials
