Back to AI Flashcard MakerAnatomy and Physiology /Anatomy & Physiology Lec & Lab : Lecture Exam Ch. 12 & 13
Anatomy & Physiology Lec & Lab : Lecture Exam Ch. 12 & 13
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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| 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 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 |