Neuro1
... Myelin is secreted by Schwann cells in the PNS and oligodendrocytes in the CNS. 3) All neurons and supporting cells are derived from the ectoderm. As the notochord develops in embryonic development, it included the overlying ectoderm to form a neuroectoderm that thickens and becomes a neural plate. ...
... Myelin is secreted by Schwann cells in the PNS and oligodendrocytes in the CNS. 3) All neurons and supporting cells are derived from the ectoderm. As the notochord develops in embryonic development, it included the overlying ectoderm to form a neuroectoderm that thickens and becomes a neural plate. ...
sympathetic and parasympathetic systems
... - an action potential can only be initiated at the dendrite end of a nerve fiber (receptor or synapse) Thus the impulse can only travel away from the receptor towards the cell body. It never goes in the opposite direction (although it can be made to do so artificially) ALL OR NONE - action potential ...
... - an action potential can only be initiated at the dendrite end of a nerve fiber (receptor or synapse) Thus the impulse can only travel away from the receptor towards the cell body. It never goes in the opposite direction (although it can be made to do so artificially) ALL OR NONE - action potential ...
Nervous System Part 1
... outnumber the neurons by as much as 50 : 1 Neuroglia or glial cells Support and protect the neurons Bind neurons together and form framework for nervous tissue In fetus, guide migrating neurons to their destination If mature neuron is not in synaptic contact with another neuron it is cover ...
... outnumber the neurons by as much as 50 : 1 Neuroglia or glial cells Support and protect the neurons Bind neurons together and form framework for nervous tissue In fetus, guide migrating neurons to their destination If mature neuron is not in synaptic contact with another neuron it is cover ...
Peripheral Nervous System
... another across synapses, or spaces inbetween the cells. • The “jumping across” the synapse is facilitated by chemicals called Neurotransmitters. ...
... another across synapses, or spaces inbetween the cells. • The “jumping across” the synapse is facilitated by chemicals called Neurotransmitters. ...
II. ORGANIZATION OF THE HUMAN NERVOUS
... long, single fiber with many small tips called _axon terminals_________. Schwann Cells – Wrap around the axons of many neurons to form insulating layers known as a _myelin sheath_______; _insulate______ and _protect_____ the neuron. There are small gaps in the myelin sheath along an axon called _n ...
... long, single fiber with many small tips called _axon terminals_________. Schwann Cells – Wrap around the axons of many neurons to form insulating layers known as a _myelin sheath_______; _insulate______ and _protect_____ the neuron. There are small gaps in the myelin sheath along an axon called _n ...
Chapter 12
... 23. Compare the absolute and relative refractory periods and the relation of axon diameter to action potential generation frequency. Propagation of Action Potentials 24. Discuss how the sodium ion flow in one area of an axon leads to initiation of an action potential in an adjacent region of the axo ...
... 23. Compare the absolute and relative refractory periods and the relation of axon diameter to action potential generation frequency. Propagation of Action Potentials 24. Discuss how the sodium ion flow in one area of an axon leads to initiation of an action potential in an adjacent region of the axo ...
The Nervous System - Plain Local Schools
... • Neurons have the ability to conduct nerve impulses very quickly, but how does one cell communicate with another cell? • Adjacent neurons communicate by releasing chemicals across tiny gaps that separate them, called synapses (synaptic cleft) • The chemicals, known as neurotransmitters, are release ...
... • Neurons have the ability to conduct nerve impulses very quickly, but how does one cell communicate with another cell? • Adjacent neurons communicate by releasing chemicals across tiny gaps that separate them, called synapses (synaptic cleft) • The chemicals, known as neurotransmitters, are release ...
Chapter 48 Worksheet
... e. The binding of neurotransmitter molecules to receptors transmits an impulse across a synapse. 4. A drug that causes potassium to leak out of a neuron, increasing the positive charge on the outside, would _____. a. make it easier to trigger action potentials in the neuron b. cause the cell to rele ...
... e. The binding of neurotransmitter molecules to receptors transmits an impulse across a synapse. 4. A drug that causes potassium to leak out of a neuron, increasing the positive charge on the outside, would _____. a. make it easier to trigger action potentials in the neuron b. cause the cell to rele ...
The Nervous System - AP Psychology-NWHS
... Autonomic Nervous System Carries messages between CNS and internal organs, “fight or ...
... Autonomic Nervous System Carries messages between CNS and internal organs, “fight or ...
Nerves
... • The human brain contains about 100 billion neurons, organized into circuits more complex than the most powerful supercomputers • A recent advance in brain exploration involves a method for expressing combinations of colored proteins in brain cells, a technique called “brainbow” • This may allow re ...
... • The human brain contains about 100 billion neurons, organized into circuits more complex than the most powerful supercomputers • A recent advance in brain exploration involves a method for expressing combinations of colored proteins in brain cells, a technique called “brainbow” • This may allow re ...
Nervous System
... membrane through channel proteins (3). Some channel proteins never shut, so the ions diffuse through them all the time. Other channel proteins act like flood gates, that open only after a neuron is stimulated. Sodium-potassium pumps (active transport proteins) restore the neuron to resting potential ...
... membrane through channel proteins (3). Some channel proteins never shut, so the ions diffuse through them all the time. Other channel proteins act like flood gates, that open only after a neuron is stimulated. Sodium-potassium pumps (active transport proteins) restore the neuron to resting potential ...
Unit 2: The body and the Brain
... Study Guide 1. What is the difference between the central nervous system and the peripheral nervous system? ...
... Study Guide 1. What is the difference between the central nervous system and the peripheral nervous system? ...
File
... communication allowing the animal to respond to internal and external stimuli • Nervous system (Rapid responses) • Endocrine system (Slower responses) There are 2 parts to the nervous system: ...
... communication allowing the animal to respond to internal and external stimuli • Nervous system (Rapid responses) • Endocrine system (Slower responses) There are 2 parts to the nervous system: ...
1.nerve notes
... A myelin sheath (found on some neurons) allows the message to travel faster (like insulation on an electrical cord ) Multiple Sclerosis - the myelin sheath is attacked by the immune system (autoimmune disease) After the myelin is destroyed it leaves behind scar tissue (sclerosis means scar). The s ...
... A myelin sheath (found on some neurons) allows the message to travel faster (like insulation on an electrical cord ) Multiple Sclerosis - the myelin sheath is attacked by the immune system (autoimmune disease) After the myelin is destroyed it leaves behind scar tissue (sclerosis means scar). The s ...
REVIEW OF Nervous system anatomy File
... oligodendrocyte Nerve fibers (d) Oligodendrocytes have processes that form myelin sheaths around CNS nerve fibers. ...
... oligodendrocyte Nerve fibers (d) Oligodendrocytes have processes that form myelin sheaths around CNS nerve fibers. ...
Nervous System Exam Review
... Be able to diagram how the nervous system is organized (refer to concept map). What is the fundamental unit of the nervous system? Distinguish between a neuron and a neuroglia cell. Know the 5 types of neuroglia cell --- where are they found, what do they do. Identify neurons by structural classific ...
... Be able to diagram how the nervous system is organized (refer to concept map). What is the fundamental unit of the nervous system? Distinguish between a neuron and a neuroglia cell. Know the 5 types of neuroglia cell --- where are they found, what do they do. Identify neurons by structural classific ...
Take the 10-item multiple choice quiz to check
... are the input part of the neuron. conduct action potentials away from the cell body. are generally long and unbranched. form synapses with the microglia. contain the trigger zone. ...
... are the input part of the neuron. conduct action potentials away from the cell body. are generally long and unbranched. form synapses with the microglia. contain the trigger zone. ...
Central and Peripheral nervous systems
... Another subsystem of the PNS Responsible for our awareness of the external environment Contains both afferent and efferent nerve fibres Through this system, the PNS receives and processes information from receptors in the skin, voluntary muscles, tendons, and joints Gives us the sensations of touch, ...
... Another subsystem of the PNS Responsible for our awareness of the external environment Contains both afferent and efferent nerve fibres Through this system, the PNS receives and processes information from receptors in the skin, voluntary muscles, tendons, and joints Gives us the sensations of touch, ...
The Nervous System
... a. cell body – consists of a nucleus (control center). The nucleus receives and sends nerve impulses. b. dendrites – branching projections of the cell body. Receive and carry impulses toward the cell body. c. axons – extension of the neuron that carries impulses away from the cell body. Most axons h ...
... a. cell body – consists of a nucleus (control center). The nucleus receives and sends nerve impulses. b. dendrites – branching projections of the cell body. Receive and carry impulses toward the cell body. c. axons – extension of the neuron that carries impulses away from the cell body. Most axons h ...
Nervous System Ch 10 Notes - Reading Community Schools
... conducts nerve impulses from the cell body • Terminates at another neuron, muscle or gland • May be up to a meter ...
... conducts nerve impulses from the cell body • Terminates at another neuron, muscle or gland • May be up to a meter ...
The Nervous System of the Human Body
... ○ It sends and receives messages. ● Another is the spinal cord. ○ The spinal cord is like the highway it moves messages across the body. ● Nerves are like the the smaller roads. ● Neurons are cells inside the nerves. ● Ganglia outside CNS it is the place that controls ...
... ○ It sends and receives messages. ● Another is the spinal cord. ○ The spinal cord is like the highway it moves messages across the body. ● Nerves are like the the smaller roads. ● Neurons are cells inside the nerves. ● Ganglia outside CNS it is the place that controls ...
The Nerve Impulse
... along the inside of the membrane, The membrane is polarized. - this separation of charges gives the nerve cell membrane the potential to do work. -upon excitation, the nerve cell membrane becomes more permeable to sodium than potassium. Sodium gates open! - potassium gates close, sodium diffuses int ...
... along the inside of the membrane, The membrane is polarized. - this separation of charges gives the nerve cell membrane the potential to do work. -upon excitation, the nerve cell membrane becomes more permeable to sodium than potassium. Sodium gates open! - potassium gates close, sodium diffuses int ...