The Brain and Behavior
... CNS. • Motoneurons or Multipolar neurons carry signals from the CNS muscles and glands. • Interneurons or Pseudopolare (Spelling) cells form all the neural wiring within the CNS. These have two axons (instead of an axon and a dendrite). One axon communicates with the spinal cord; one with either the ...
... CNS. • Motoneurons or Multipolar neurons carry signals from the CNS muscles and glands. • Interneurons or Pseudopolare (Spelling) cells form all the neural wiring within the CNS. These have two axons (instead of an axon and a dendrite). One axon communicates with the spinal cord; one with either the ...
Central nervous system
... •The presence of myelin speeds up the transmission of signals along the axon •Myelin will get laid down in segments along the axon, leaving unmyelinated gaps known as “nodes of Ranvier” ...
... •The presence of myelin speeds up the transmission of signals along the axon •Myelin will get laid down in segments along the axon, leaving unmyelinated gaps known as “nodes of Ranvier” ...
The Nervous System
... 1. A nerve impulse begins with a stimulus- usually this is a neurotransmitter released by other neurons, pain receptors, light excites receptors in the eye, etc. 2. Once the neuron is stimulated the “sodium gates” of the neuron open and sodium ions begin flowing across the cell membrane. This is cal ...
... 1. A nerve impulse begins with a stimulus- usually this is a neurotransmitter released by other neurons, pain receptors, light excites receptors in the eye, etc. 2. Once the neuron is stimulated the “sodium gates” of the neuron open and sodium ions begin flowing across the cell membrane. This is cal ...
ACh - Perkins Science
... ACh is a neurotransmitter that directly opens ion channels when it binds to its receptor. a. In some cases, ACh is excitatory, and in other cases it is inhibitory, depending on the organ involved b. Excitatory in some areas of the CNS, in some autonomic motor neurons, and in all somatic motor neuron ...
... ACh is a neurotransmitter that directly opens ion channels when it binds to its receptor. a. In some cases, ACh is excitatory, and in other cases it is inhibitory, depending on the organ involved b. Excitatory in some areas of the CNS, in some autonomic motor neurons, and in all somatic motor neuron ...
Chapter 6
... If threshold reached, AP is generated Receptor potentials Occur in separate receptor cells Stimulus opens ion channels in receptor causing graded membrane potential Receptor cell releases chemical messenger Chemical messenger opens ion channels in afferent neuron AP generating region If threshold re ...
... If threshold reached, AP is generated Receptor potentials Occur in separate receptor cells Stimulus opens ion channels in receptor causing graded membrane potential Receptor cell releases chemical messenger Chemical messenger opens ion channels in afferent neuron AP generating region If threshold re ...
Human Biology Human Body Systems Nervous System
... once in motion the ACTION POTENTIAL keeps the impulse moving along the axon to the SYNAPSE ...
... once in motion the ACTION POTENTIAL keeps the impulse moving along the axon to the SYNAPSE ...
1 Introduction to Neurobiology Rudolf Cardinal NST 1B
... The action potential. A basic function common to most neurons is their ability to produce nerve impulses or action potentials that travel down the cell membrane. All cells, including neurons, pump sodium ions (Na+) out of themselves in exchange for potassium (K+) in the ratio 3:2; this results in a ...
... The action potential. A basic function common to most neurons is their ability to produce nerve impulses or action potentials that travel down the cell membrane. All cells, including neurons, pump sodium ions (Na+) out of themselves in exchange for potassium (K+) in the ratio 3:2; this results in a ...
The Nervous System
... Diseases of the Nervous System Cerebral Palsy – caused by abnormalities in parts of the brain that control muscle movements. The early signs of cerebral palsy usually appear before a child reaches 3 years of age. Most common symptoms are a lack of muscle coordination when performing voluntary movem ...
... Diseases of the Nervous System Cerebral Palsy – caused by abnormalities in parts of the brain that control muscle movements. The early signs of cerebral palsy usually appear before a child reaches 3 years of age. Most common symptoms are a lack of muscle coordination when performing voluntary movem ...
AP Psychology - HOMEWORK 9
... An action potential occurs when the first part of the axon opens its gates and __________________________ charged ions rush in, causing that part of the neuron to become depolarized. (1 pt) ...
... An action potential occurs when the first part of the axon opens its gates and __________________________ charged ions rush in, causing that part of the neuron to become depolarized. (1 pt) ...
Chapter 10
... can help explain the actions of certain drugs • drugs have different mechanisms of action • several questions remain about the biological effects of addiction, such as why some individuals become ...
... can help explain the actions of certain drugs • drugs have different mechanisms of action • several questions remain about the biological effects of addiction, such as why some individuals become ...
The Nervous System WS-11A Review Quest
... The two primary cells of the nervous system are neurons, that actually carry and store information, and glial cells that support the neurons. 3. What protects the brain? The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cush ...
... The two primary cells of the nervous system are neurons, that actually carry and store information, and glial cells that support the neurons. 3. What protects the brain? The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cush ...
The Nervous System The master and
... Method of communication? _________________ impulses The Three Overlapping Functions It uses millions of sensory receptors to _________________ _________________ called _________________ inside and outside the body. It _________________ and _________________ this gathered information called _________ ...
... Method of communication? _________________ impulses The Three Overlapping Functions It uses millions of sensory receptors to _________________ _________________ called _________________ inside and outside the body. It _________________ and _________________ this gathered information called _________ ...
File
... The ______________, the Skin, the Eye, the ________________, and the Tongue The Nervous System and Environment The ___________________ is everything outside the body. The sense organs gather information from outside the body, then send the messages to the brain STIMULUS & RESPONSE Stimulus (the ca ...
... The ______________, the Skin, the Eye, the ________________, and the Tongue The Nervous System and Environment The ___________________ is everything outside the body. The sense organs gather information from outside the body, then send the messages to the brain STIMULUS & RESPONSE Stimulus (the ca ...
Electrochemical Impulses
... 3. A reversal of charge occurs, called depolarization (this is the ‘firing’ of the neuron) 4. Once the inside of the neuron becomes positive, the Na+ gates close. 5. A Na+ - K+ pump in the cell membrane moves sodium out and potassium in, restoring the resting potential (called re-polarization) ...
... 3. A reversal of charge occurs, called depolarization (this is the ‘firing’ of the neuron) 4. Once the inside of the neuron becomes positive, the Na+ gates close. 5. A Na+ - K+ pump in the cell membrane moves sodium out and potassium in, restoring the resting potential (called re-polarization) ...
OCR Document - MrsGorukhomework
... electrically charged, cannot dissolve in the lipid and can't directly diffuse across. In order to cross, they must either be transported by proteins or move through ion channels or pores gated ion channels. The ion channels are specific to ions - ones for Na+, others for CI- and K +. Cell has a grea ...
... electrically charged, cannot dissolve in the lipid and can't directly diffuse across. In order to cross, they must either be transported by proteins or move through ion channels or pores gated ion channels. The ion channels are specific to ions - ones for Na+, others for CI- and K +. Cell has a grea ...
Neuron Function notes
... ***Neuron at rest – more Na+ outside than K+ inside Cl- and negative proteins add to – inside Polarized state = resting membrane potential (+out, - in) ACTION POTENTIAL (nerve impulse) SEQUENCE OF EVENTS [AT CHOLINERGIC SYNAPSE(acetylcholine is neurotransmitter)] 1. Arriving AP depoliarizes the syna ...
... ***Neuron at rest – more Na+ outside than K+ inside Cl- and negative proteins add to – inside Polarized state = resting membrane potential (+out, - in) ACTION POTENTIAL (nerve impulse) SEQUENCE OF EVENTS [AT CHOLINERGIC SYNAPSE(acetylcholine is neurotransmitter)] 1. Arriving AP depoliarizes the syna ...
Nervous System and Senses - Avon Community School Corporation
... When an action potential reaches the end of an axon, Ca channels in the neuron open Ca rushes in and cause the synaptic vesicles to fuse with the cell membrane and release the neurotransmitters into the synaptic cleft After binding, neurotransmitters will either be destroyed in the synaptic cle ...
... When an action potential reaches the end of an axon, Ca channels in the neuron open Ca rushes in and cause the synaptic vesicles to fuse with the cell membrane and release the neurotransmitters into the synaptic cleft After binding, neurotransmitters will either be destroyed in the synaptic cle ...
Reflex Arc.
... • Synapse is “The junction across which a nerve impulse passes from an axon terminal to a neuron, muscle cell or gland” • Two types of Synapses: o Excitatory o Inhibitory ...
... • Synapse is “The junction across which a nerve impulse passes from an axon terminal to a neuron, muscle cell or gland” • Two types of Synapses: o Excitatory o Inhibitory ...
Nervous System Quiz Answers
... Microglia – phagocytes of CNS engulf invading microorganisms and dead neurons. Ependymal – simple epithelium that lines central cavity of brain and spinal cord. NOTE: I did not list the Schwann cells because they are part of the PNS not CNS. 2. How does a nerve send a “message” when stimulated? (8pt ...
... Microglia – phagocytes of CNS engulf invading microorganisms and dead neurons. Ependymal – simple epithelium that lines central cavity of brain and spinal cord. NOTE: I did not list the Schwann cells because they are part of the PNS not CNS. 2. How does a nerve send a “message” when stimulated? (8pt ...
Neurons, Neurons, Neurons!
... Information from one neuron flows to another neuron across a synapse. The synapse is a small gap separating neurons. The synapse consists of: 1. a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles, 2. a postsynaptic ending that contains receptor sites for ne ...
... Information from one neuron flows to another neuron across a synapse. The synapse is a small gap separating neurons. The synapse consists of: 1. a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles, 2. a postsynaptic ending that contains receptor sites for ne ...
Chapter 48 Worksheet
... c. Vesicles containing neurotransmitter molecules diffuse to the receiving cell's plasma membrane. d. Neurotransmitter molecules bind to receptors in the receiving cell's plasma membrane. e. The binding of neurotransmitter molecules to receptors transmits an impulse across a synapse. 4. A drug that ...
... c. Vesicles containing neurotransmitter molecules diffuse to the receiving cell's plasma membrane. d. Neurotransmitter molecules bind to receptors in the receiving cell's plasma membrane. e. The binding of neurotransmitter molecules to receptors transmits an impulse across a synapse. 4. A drug that ...
Stimulus (physiology)
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.