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Anatomy & Physiology Lec & Lab : Lecture Exam Ch. 12 & 13

Anatomy and Physiology27 CardsCreated 3 months ago

This deck covers key concepts from Chapters 12 and 13 of Anatomy & Physiology, focusing on the central and peripheral nervous systems, neuron functions, and neurotransmission.

What are the components of the CNS

The brain and the spinal cord
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Key Terms

Term
Definition
What are the components of the CNS
The brain and the spinal cord
What are the components of the PNS
All neural tissue outside the CNS; cranial nerves and spinal nerves
What is the difference between spinal and cranial nerves
Spinal emerge from the spinal cord and Cranial emerge from the brain
What type of information is carried by the Afferent division of PNS
Brings sensory information to the brain and spinal cord
What type of information is carried by the Efferent division of PNS
Carries motor commands; from CNS to muscles and glands
What is the difference between somatic and automatic nervous systems
Somatic controls skeletal muscles, it can be voluntary OR involuntary; Automatic controls effectors like smooth and cardiac muscles. This is automatic...

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TermDefinition
What are the components of the CNS
The brain and the spinal cord
What are the components of the PNS
All neural tissue outside the CNS; cranial nerves and spinal nerves
What is the difference between spinal and cranial nerves
Spinal emerge from the spinal cord and Cranial emerge from the brain
What type of information is carried by the Afferent division of PNS
Brings sensory information to the brain and spinal cord
What type of information is carried by the Efferent division of PNS
Carries motor commands; from CNS to muscles and glands
What is the difference between somatic and automatic nervous systems
Somatic controls skeletal muscles, it can be voluntary OR involuntary; Automatic controls effectors like smooth and cardiac muscles. This is automatic or involuntary only
The main function of the cell body
Contains lots of substructures; Receives information input from dendrites
The main function of Dendrites
Receive incoming info
Main function of Axons
Carries action potentials
The main function of Synapse
Allows information to pass between neurons
The main function of Neurotransmitters
They are the molecules used by the nervous system to transmit messages between neurons, or from neurons to muscles.
Main function of Neuromuscular junction
They are the molecules used by the nervous system to transmit messages between neurons, or from neurons to muscles.
The main function of Neuroglandular junction
Junction between neuron and gland
The main function of presynaptic membrane
The membrane of a neuron that releases neurotransmitter into the synaptic cleft between nerve cells
The main function of postsynaptic membrane
Receives a signal (binds neurotransmitter) from the presynaptic cell and responds via depolarisation or hyperpolarisation.
What are unipolar neurons and what type of information do they transmit
Sensory info; Axon and dendrites are continuous
What are multipolar neurons and what type of information do they transmit
They possess a single axon with several symmetrically radiating dendrites
What are the major events taking place at RMP
K+ that leaks from the inside of the cell to the outside via leak K+ channels and generates a negative charge in the inside of the membrane vs the outside. At rest, the membrane is impermeable to Na+, as all of the Na+ channels are closed.
Continuous vs saltatory propagation
The key difference between saltatory and continuous conduction is that saltatory conduction is the propagation of action potential along myelinated axons while continuous conduction is the propagation of action potential along unmyelinated axons.
3 types of fibers
Type A; Type B; Type C
Type A fibers
Largest, myelinated.; Carries AP at over 300MPH
Type B fibers
Smaller than A, Still myelinated; 40MPH
Type C fibers
Smallest, unmyelinated; 2 MPH
Main characteristic of excitatory NT
They increase the likelihood that the neuron will fire an action potential; DEPOLARIZATION
Main characteristic of inhibitory NT
They decrease the likelihood that the neuron will fire an action; HYPERPOLARIZATION
Cholinergic synapse
Chemical synapses that use acetylcholine molecules as the neurotransmitter. Ca2+
Role of Norepinephrine
Brain and ANS; Adrenergic synapse; Excitatory; mobilize the brain and body for action