Nervous System - North Mac Schools
... • 1. Anaxonic- not distinguishing dendrite from axon • 2. Bipolar- 2 distinct processes(1 dendrite & 1 axon) • Rare- in special sense organs for sight, smell, hearing ...
... • 1. Anaxonic- not distinguishing dendrite from axon • 2. Bipolar- 2 distinct processes(1 dendrite & 1 axon) • Rare- in special sense organs for sight, smell, hearing ...
9.1-9.4 Notes
... – Axon hillock-elevated portion leading into the axon from the cell body – May have side branches – PNS axons-made of Schwann cells that make myelin – Neurilemma-covering that surrounds myelin sheath – Nodes of Ranvier-gaps in between myelin sheath of axon • Myelinated in CNS are called white matter ...
... – Axon hillock-elevated portion leading into the axon from the cell body – May have side branches – PNS axons-made of Schwann cells that make myelin – Neurilemma-covering that surrounds myelin sheath – Nodes of Ranvier-gaps in between myelin sheath of axon • Myelinated in CNS are called white matter ...
Ch. 27 notes - The Nervous System
... vii. In this way, the action potential is self-propagated along the axon until it reaches the end. It is described as an “all-or-nothing” event: if the action potential forms, it will travel the length of the axon. viii. The myelin sheath speeds the transmission by restricting the opening of the gat ...
... vii. In this way, the action potential is self-propagated along the axon until it reaches the end. It is described as an “all-or-nothing” event: if the action potential forms, it will travel the length of the axon. viii. The myelin sheath speeds the transmission by restricting the opening of the gat ...
Lecture 2 - Nerve Impulse
... Nerve Impulses Action Potential: Potential: occurs when there is a change in polarity in the axon’s membrane. “All or none” - Depolarization - When the inside of the axon first becomes positive compared to the outside of the cell. Na+ ions move to the inside of the axon. - Repolarization - When the ...
... Nerve Impulses Action Potential: Potential: occurs when there is a change in polarity in the axon’s membrane. “All or none” - Depolarization - When the inside of the axon first becomes positive compared to the outside of the cell. Na+ ions move to the inside of the axon. - Repolarization - When the ...
Chapter 7: The Nervous System
... Nerves – bundles of axons common to a section of the body • Types of Nerves: • Sensory: conduct impulses into the brain and spinal cord • Motor: carry impulses to muscles or gland • Mixed: contains both sensory and motor ...
... Nerves – bundles of axons common to a section of the body • Types of Nerves: • Sensory: conduct impulses into the brain and spinal cord • Motor: carry impulses to muscles or gland • Mixed: contains both sensory and motor ...
Neurocytology 2
... Also forms the sheath for unmyelinated axons in the PNS o May form the sheath for as many as 20 unmyelinated axons (usually C fibers for pain and autonomic axons) Role in Developing PNS Axons: o Schwann cells first align along an axon o Elongation and spiraling of the membranes around the axon ultim ...
... Also forms the sheath for unmyelinated axons in the PNS o May form the sheath for as many as 20 unmyelinated axons (usually C fibers for pain and autonomic axons) Role in Developing PNS Axons: o Schwann cells first align along an axon o Elongation and spiraling of the membranes around the axon ultim ...
Histology Laboratories Molecules to Systems
... Lodish, H. et al. Molecular Cell Biology. W. H. Freeman, New York, 2000. Mizoguti, H. Color Slide Atlas of Histology. Nihon Shashin Shinbunsha, Tokyo. Young, B. and Heath, J. W. Wheater’s Functional Histology. Churchill ...
... Lodish, H. et al. Molecular Cell Biology. W. H. Freeman, New York, 2000. Mizoguti, H. Color Slide Atlas of Histology. Nihon Shashin Shinbunsha, Tokyo. Young, B. and Heath, J. W. Wheater’s Functional Histology. Churchill ...
Nervous System Poster
... Essential Knowledge: Animals have nervous systems that detect external and internal signals, transmit and integrate information and produce responses. A. The neuron is the basic structure of the nervous system that reflects function. 1. A typical neuron has a cell body, axon and dendrites. Many axon ...
... Essential Knowledge: Animals have nervous systems that detect external and internal signals, transmit and integrate information and produce responses. A. The neuron is the basic structure of the nervous system that reflects function. 1. A typical neuron has a cell body, axon and dendrites. Many axon ...
INTEGUMENTARY SYSTEM
... Na+ Channels Close, K+ Channels Open & K+ Diffuses Out of Neuron Results In Repolarization Action Potential = Depolarization + Repolarization (dendrite to axon) Repolarization Required before another Action Potential Sodium-Potassium Pump moves Na+ out & K+ in (Requires Energy) ...
... Na+ Channels Close, K+ Channels Open & K+ Diffuses Out of Neuron Results In Repolarization Action Potential = Depolarization + Repolarization (dendrite to axon) Repolarization Required before another Action Potential Sodium-Potassium Pump moves Na+ out & K+ in (Requires Energy) ...
Chapter Eleven
... Na+, K+, Cl, and protein anions (A) • Ionic differences are the consequence of: – Differential __________________________ of the neurilemma to Na+ and K+ – Operation of the _ ...
... Na+, K+, Cl, and protein anions (A) • Ionic differences are the consequence of: – Differential __________________________ of the neurilemma to Na+ and K+ – Operation of the _ ...
7 - Lps.org
... The door slams shut loudly and you flinch. After a few seconds, you realize that your heart is beating very rapidly and forcefully. This response is the result of your ______ nervous system. ...
... The door slams shut loudly and you flinch. After a few seconds, you realize that your heart is beating very rapidly and forcefully. This response is the result of your ______ nervous system. ...
Biology Name____________________ Introduction to the Nervous
... DIVISIONS OF THE NERVOUS SYSTEM ...
... DIVISIONS OF THE NERVOUS SYSTEM ...
Ch 48: Nervous System – part 1
... Electrical Synapses: allow action potentials to spread directly from pre- to postsynaptic cell *connected by gap junctions (intercellular channels that allow local ion currents) **Most synapses are… Chemical Synapses: cells are separated by a synaptic cleft, so cells are not electrically coupled; ...
... Electrical Synapses: allow action potentials to spread directly from pre- to postsynaptic cell *connected by gap junctions (intercellular channels that allow local ion currents) **Most synapses are… Chemical Synapses: cells are separated by a synaptic cleft, so cells are not electrically coupled; ...
The peripheral nerves
... Type A fibers carry sensory information to the CNS concerning position, balance, and delicate touch and pressure sensations from the surface of the skin. The motor neurons that control skeletal muscles also send their commands over large, myelinated Type A axons. Type B fibers and Type C fibers carr ...
... Type A fibers carry sensory information to the CNS concerning position, balance, and delicate touch and pressure sensations from the surface of the skin. The motor neurons that control skeletal muscles also send their commands over large, myelinated Type A axons. Type B fibers and Type C fibers carr ...
Peripheral nervous system
... one section of the axon 4. The Na+ channels in that area close but the region down the axon gets positive enough to reach threshold Na+ channels open and sodium rushes in… this continues down the axon 5. The K+ channels open and potassium diffuses out 6. The cell becomes repolarized BUT K+ is conc ...
... one section of the axon 4. The Na+ channels in that area close but the region down the axon gets positive enough to reach threshold Na+ channels open and sodium rushes in… this continues down the axon 5. The K+ channels open and potassium diffuses out 6. The cell becomes repolarized BUT K+ is conc ...
notes - Mrs. Blackmon`s Science Blackboard
... 6. satellite cells - controlling chemical environment ...
... 6. satellite cells - controlling chemical environment ...
The Neuron MMHS Advanced Biomed Chitraroff
... of brain and most peripheral nerves. • Nodes of Ranvier= gaps in myelin sheath. • Acts as an insulator that speeds up nerve impulses. White Matter = Myelinated Grey Matter = Non-myelinated ...
... of brain and most peripheral nerves. • Nodes of Ranvier= gaps in myelin sheath. • Acts as an insulator that speeds up nerve impulses. White Matter = Myelinated Grey Matter = Non-myelinated ...
neurology1ned2013 31.5 KB - d
... change in environment. (like a charged battery). A potential is a change in charge (chemical or physical) that transmits information. Neurons communicate by using chemical signals that generate electricity. Electricity is the movement of charge, specifically e- (negative). Neurotransmitters control ...
... change in environment. (like a charged battery). A potential is a change in charge (chemical or physical) that transmits information. Neurons communicate by using chemical signals that generate electricity. Electricity is the movement of charge, specifically e- (negative). Neurotransmitters control ...
Mind Is Matter
... 2. Draw a diagram of a neuron and label each structure below. Describe the function of each structure. Cell body Dendrites Axon Myelin sheath Terminal endings Nodes of Ranvier 3. Describe the direction of communication within a neuron and between two neurons. 4. Identify the various structures with ...
... 2. Draw a diagram of a neuron and label each structure below. Describe the function of each structure. Cell body Dendrites Axon Myelin sheath Terminal endings Nodes of Ranvier 3. Describe the direction of communication within a neuron and between two neurons. 4. Identify the various structures with ...
Outline10 Action Potl
... - resting states of channels and resting potential restored at the end of undershoot phase Properties of action potentials 1. threshold - stimulus must be greater than a certain strength to evoke an AP 2. "all or none" - once threshold is reached, size of the AP is constant regardless of stimulus 3. ...
... - resting states of channels and resting potential restored at the end of undershoot phase Properties of action potentials 1. threshold - stimulus must be greater than a certain strength to evoke an AP 2. "all or none" - once threshold is reached, size of the AP is constant regardless of stimulus 3. ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.