Chapt13 Lecture 13ed Pt 2
... the synapse occur? • Nerve impulse reaches the axon terminal. • Calcium ions enter the axon terminal and stimulate the synaptic vesicles to fuse with the presynaptic membrane. • Neurotransmitters are released and diffuse across the synapse, where they bind with the postsynaptic membrane to inhibit o ...
... the synapse occur? • Nerve impulse reaches the axon terminal. • Calcium ions enter the axon terminal and stimulate the synaptic vesicles to fuse with the presynaptic membrane. • Neurotransmitters are released and diffuse across the synapse, where they bind with the postsynaptic membrane to inhibit o ...
notes as
... and bind to receptor molecules in the membrane of the postsynaptic neuron thus changing their shape. – This opens up holes that allow specific ions in or out. • The effectiveness of the synapse can be changed – vary the number of vesicles of transmitter – vary the number of receptor molecules. • Syn ...
... and bind to receptor molecules in the membrane of the postsynaptic neuron thus changing their shape. – This opens up holes that allow specific ions in or out. • The effectiveness of the synapse can be changed – vary the number of vesicles of transmitter – vary the number of receptor molecules. • Syn ...
Lecture 7 Neurons
... – Fatty material made by glial cells – Insulates the axon – Allows for rapid movement of electrical impulses along axon – Nodes of Ranvier: gaps in myelin sheath where action potentials are transmitted – Multiple sclerosis is a breakdown of myelin sheath – Speed of neural impulse Ranges from 2 – 200 ...
... – Fatty material made by glial cells – Insulates the axon – Allows for rapid movement of electrical impulses along axon – Nodes of Ranvier: gaps in myelin sheath where action potentials are transmitted – Multiple sclerosis is a breakdown of myelin sheath – Speed of neural impulse Ranges from 2 – 200 ...
topic 6.5 Neurons
... – Fatty material made by glial cells – Insulates the axon – Allows for rapid movement of electrical impulses along axon – Nodes of Ranvier: gaps in myelin sheath where action potentials are transmitted – Multiple sclerosis is a breakdown of myelin sheath – Speed of neural impulse Ranges from 2 – 200 ...
... – Fatty material made by glial cells – Insulates the axon – Allows for rapid movement of electrical impulses along axon – Nodes of Ranvier: gaps in myelin sheath where action potentials are transmitted – Multiple sclerosis is a breakdown of myelin sheath – Speed of neural impulse Ranges from 2 – 200 ...
neurons
... In CNS- arousal; role in depression, possible role in spinal analgesia, possible motivated ...
... In CNS- arousal; role in depression, possible role in spinal analgesia, possible motivated ...
The Nervous System
... • The myelin sheath is made by ________ in the CNS and by _________ in the PNS. • This wrapping is never complete. Interspersed along the axon are gaps where there is no myelin – these are nodes of Ranvier. • In the PNS, the exterior of the Schwann cell surrounding an axon is the neurilemma ...
... • The myelin sheath is made by ________ in the CNS and by _________ in the PNS. • This wrapping is never complete. Interspersed along the axon are gaps where there is no myelin – these are nodes of Ranvier. • In the PNS, the exterior of the Schwann cell surrounding an axon is the neurilemma ...
Chapter 3: The Biological Bases of Behavior
... The Postsynaptic Potential • Voltage change at receptor site – postsynaptic potential (PSP) – Not all-or-none – Changes the probability of the postsynaptic neuron firing • Positive voltage shift – excitatory PSP • Negative voltage shift – inhibitory PSP ...
... The Postsynaptic Potential • Voltage change at receptor site – postsynaptic potential (PSP) – Not all-or-none – Changes the probability of the postsynaptic neuron firing • Positive voltage shift – excitatory PSP • Negative voltage shift – inhibitory PSP ...
nervous system
... by inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of ...
... by inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of ...
17-01-05 1 Golgi - stained neurons Neuronal function
... - vary in length … a few 10’s of microns, to many cm. - contain microtubules and microtubule binding proteins - relatively constant diameter in any neuron - always have specialized areas that release neurotransmitter -- terminal or en passant ...
... - vary in length … a few 10’s of microns, to many cm. - contain microtubules and microtubule binding proteins - relatively constant diameter in any neuron - always have specialized areas that release neurotransmitter -- terminal or en passant ...
Powerpoint version
... Nerve cells have a Na+K+ pump and selective permeability to Na+and K+ that set up a potential Na+K+ pump transports 3 Na+ out for every 2 K+ in. ...
... Nerve cells have a Na+K+ pump and selective permeability to Na+and K+ that set up a potential Na+K+ pump transports 3 Na+ out for every 2 K+ in. ...
The Nervous System
... Functional Unit of the Nervous System—The NEURON Cell body—contains nucleus & organelles Dendrites—short, highly branched processes (extensions) that receive incoming messages from other cells Axons—usually much longer than dendrites, convey outgoing messages from neurons to other cells ...
... Functional Unit of the Nervous System—The NEURON Cell body—contains nucleus & organelles Dendrites—short, highly branched processes (extensions) that receive incoming messages from other cells Axons—usually much longer than dendrites, convey outgoing messages from neurons to other cells ...
Q1 (from chapter 1)
... A. Lobotomy causes drastic changes in personality and comportment B. Major motor and sensory pathways cross sides C. Bilateral hippocampectomy causes global aphasia D. In most people the left hemisphere is dominant for language abilities E. Orbitofrontal cortex is responsible for social behavior Q2 ...
... A. Lobotomy causes drastic changes in personality and comportment B. Major motor and sensory pathways cross sides C. Bilateral hippocampectomy causes global aphasia D. In most people the left hemisphere is dominant for language abilities E. Orbitofrontal cortex is responsible for social behavior Q2 ...
The master controlling and communicating system of the body Functions
... Is the focal point for the outgrowth of neuronal processes Has no centrioles (hence its amitotic nature) Has well-developed Nissl bodies (rough ER) Contains an axon hillock – cone-shaped area from which axons arise ...
... Is the focal point for the outgrowth of neuronal processes Has no centrioles (hence its amitotic nature) Has well-developed Nissl bodies (rough ER) Contains an axon hillock – cone-shaped area from which axons arise ...
Biology 4 Practice Exam Chapter 16 – Autonomic Nervous System 1
... 7. Typical sympathetic postganglionic fibers that release norepinephrine at neuroeffector junctions are classified as a. cholinergic b. adrenergic c. norephinephric d. nonsecretory e. none of the above 8. The sympathetic division of the ANS includes which of the following? a. three segmentally arra ...
... 7. Typical sympathetic postganglionic fibers that release norepinephrine at neuroeffector junctions are classified as a. cholinergic b. adrenergic c. norephinephric d. nonsecretory e. none of the above 8. The sympathetic division of the ANS includes which of the following? a. three segmentally arra ...
p. A5 - Viktor`s Notes for the Neurosurgery Resident
... in denervated skeletal muscle, Acch receptors of fetal γ subunit-containing type appear over large portions of muscle membrane (normally, only endplate contains Acch receptors, and they are of adult ε subunit-containing type); these disappear and sensitivity returns to normal if nerve regrows (motor ...
... in denervated skeletal muscle, Acch receptors of fetal γ subunit-containing type appear over large portions of muscle membrane (normally, only endplate contains Acch receptors, and they are of adult ε subunit-containing type); these disappear and sensitivity returns to normal if nerve regrows (motor ...
Biology Notes: The Nervous System and Neurons
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
Biology of Humans 2/e
... other side where they bind with receptors on the postsynaptic cell causing the ion channels to open ...
... other side where they bind with receptors on the postsynaptic cell causing the ion channels to open ...
Document
... -nerve cells have more K+ than Na+ leakage channels -as a result, membrane permeability to K+ is higher -K+ leaks out of cell - inside becomes more negative -K+ is then pumped back in 2. Gated channels: open and close in response to a stimulus A. voltage-gated: open in response to change in voltage ...
... -nerve cells have more K+ than Na+ leakage channels -as a result, membrane permeability to K+ is higher -K+ leaks out of cell - inside becomes more negative -K+ is then pumped back in 2. Gated channels: open and close in response to a stimulus A. voltage-gated: open in response to change in voltage ...
the nervous system
... • Cells carry messages from one part of the body to another • The messages in the nervous system are electrical signals called impulses • The cells that transmit the impulses are called neurons – Made of: • Dendrite • Axon • Myelin Sheath ...
... • Cells carry messages from one part of the body to another • The messages in the nervous system are electrical signals called impulses • The cells that transmit the impulses are called neurons – Made of: • Dendrite • Axon • Myelin Sheath ...
Nervous System Notes
... Electrical Synapses • At an electrical synapse, ionic current spreads directly from one cell to another through gap junctions • Each gap junction contains a hundred or so tubular protein structures called connexons that form tunnels to connect the cytosol of the two cells • Common in smooth muscle, ...
... Electrical Synapses • At an electrical synapse, ionic current spreads directly from one cell to another through gap junctions • Each gap junction contains a hundred or so tubular protein structures called connexons that form tunnels to connect the cytosol of the two cells • Common in smooth muscle, ...
Nervous System - APBio
... (like dominoes) • Because of the refectory period, the impulse can only move in one direction ...
... (like dominoes) • Because of the refectory period, the impulse can only move in one direction ...