Respiratory and Nervous Systems
... The neurotransmitters diffuse across the cleft. The neurotransmitters bind with specific receptors on the postsynaptic membrane. Depolarization occurs on the postsynaptic membrane if threshold is reached. The neurotransmitter is destroyed by an enzyme (ex. acetylcholinesterase) or reabsorbed back in ...
... The neurotransmitters diffuse across the cleft. The neurotransmitters bind with specific receptors on the postsynaptic membrane. Depolarization occurs on the postsynaptic membrane if threshold is reached. The neurotransmitter is destroyed by an enzyme (ex. acetylcholinesterase) or reabsorbed back in ...
CHAPTER 11 Nervous Tissue - Austin Community College
... Secretion: Upon arrival of the impulse at a distant location the neuron usually secretes a chemical neurotransmitter at a synapse that crosses the synaptic gap and stimulates the next cell. ...
... Secretion: Upon arrival of the impulse at a distant location the neuron usually secretes a chemical neurotransmitter at a synapse that crosses the synaptic gap and stimulates the next cell. ...
internal stimuli
... • Neurons are cells that carry information through your nervous system. • The information is carried in what is called a nerve impulse. http://www.brainpop.com/health/bodysystems/neurons/ ...
... • Neurons are cells that carry information through your nervous system. • The information is carried in what is called a nerve impulse. http://www.brainpop.com/health/bodysystems/neurons/ ...
File
... Spinal cord serves signals between the brain and rest of the body. The function of spinal cord is to connect large of peripheral nervous system to the brain and serve as reflex center. The signal between spinal cord and body is passed through spinal nerves. ...
... Spinal cord serves signals between the brain and rest of the body. The function of spinal cord is to connect large of peripheral nervous system to the brain and serve as reflex center. The signal between spinal cord and body is passed through spinal nerves. ...
CHAPTER 13 THE NERVOUS SYSTEM
... Synapse Neurons do not touch each other so messages have to be sent from one neuron to the next… ...
... Synapse Neurons do not touch each other so messages have to be sent from one neuron to the next… ...
Anatomy and Physiology Unit 7
... 43. What is the major difference between gray matter and white matter in the CNS? Gray matter—contains mostly unmyelinated fibers and cell bodies White matter—consists of dense collections of myelinated fibers (tracts) 44. The __corpus callosum_____ connects the two hemispheres of the brain. 45. The ...
... 43. What is the major difference between gray matter and white matter in the CNS? Gray matter—contains mostly unmyelinated fibers and cell bodies White matter—consists of dense collections of myelinated fibers (tracts) 44. The __corpus callosum_____ connects the two hemispheres of the brain. 45. The ...
www.translationalneuromodeling.org
... comprise a cortical area: - excitatory pyramidal cells - excitatory stellate cells - inhibitory interneurons v is the membrane potential, m is the mean firing rate, ...
... comprise a cortical area: - excitatory pyramidal cells - excitatory stellate cells - inhibitory interneurons v is the membrane potential, m is the mean firing rate, ...
File
... Single cells or sense organ? • Pain receptors – single • Grouped together e.g. Eye • Vision very important in mammals • 3D of surroundings • Info about shape, movement and colour ...
... Single cells or sense organ? • Pain receptors – single • Grouped together e.g. Eye • Vision very important in mammals • 3D of surroundings • Info about shape, movement and colour ...
Anatomy of the Nervous System
... • Info between organs of body and CNS. – Two peripheral divisions: » Somatic • Skeletal muscles, bones, and skin • Sensory somatic PNS: relay info about environment to CNS. • Motor somatic PNS: initiate appropriate responds. » Autonomic • Motor nerves which control internal organs of body. • Sympath ...
... • Info between organs of body and CNS. – Two peripheral divisions: » Somatic • Skeletal muscles, bones, and skin • Sensory somatic PNS: relay info about environment to CNS. • Motor somatic PNS: initiate appropriate responds. » Autonomic • Motor nerves which control internal organs of body. • Sympath ...
Chapter 12 - Nervous Tissue
... Most nerves are composed of both motor & sensory fibers, thus are called _________ nerves Some _____ nerves consist of only sensory or motor neurons 1) Sensory nerves serve the special _________ (taste, smell, sight, hearing) 2) Motor nerves conduct impulses to _________, causing contraction, or gla ...
... Most nerves are composed of both motor & sensory fibers, thus are called _________ nerves Some _____ nerves consist of only sensory or motor neurons 1) Sensory nerves serve the special _________ (taste, smell, sight, hearing) 2) Motor nerves conduct impulses to _________, causing contraction, or gla ...
notes Ch. 40 tissues
... c. Cuboidal (like dice) d. Columnar (like bricks on end) e. Squamous (like floor tiles) ...
... c. Cuboidal (like dice) d. Columnar (like bricks on end) e. Squamous (like floor tiles) ...
Slide 1
... stimulus must have a certain minimum intensity to cause a neuron to fire - this is the threshold of the neuron smaller, or weaker, stimuli do not provoke a response the stimulus causes channels to open and there must be enough of them opened to depolarize the membrane increasing a stimulus above thr ...
... stimulus must have a certain minimum intensity to cause a neuron to fire - this is the threshold of the neuron smaller, or weaker, stimuli do not provoke a response the stimulus causes channels to open and there must be enough of them opened to depolarize the membrane increasing a stimulus above thr ...
Nervous System Notes
... stimulus must have a certain minimum intensity to cause a neuron to fire - this is the threshold of the neuron smaller, or weaker, stimuli do not provoke a response the stimulus causes channels to open and there must be enough of them opened to depolarize the membrane increasing a stimulus above thr ...
... stimulus must have a certain minimum intensity to cause a neuron to fire - this is the threshold of the neuron smaller, or weaker, stimuli do not provoke a response the stimulus causes channels to open and there must be enough of them opened to depolarize the membrane increasing a stimulus above thr ...
Print › psych chapter 2 | Quizlet | Quizlet
... A layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next. ...
... A layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next. ...
Intro Chap 2n.ppt
... Each Neuron consists of 3 structural parts 1. Soma or cell body 2. Axon 3. Dendrites Some axons are coated with myelin (for speed), and some may also be coated with neurilemma (allows for healing). 90% of nervous system cells are Glial Cells These provide structural support, nutrition, fuel, insulat ...
... Each Neuron consists of 3 structural parts 1. Soma or cell body 2. Axon 3. Dendrites Some axons are coated with myelin (for speed), and some may also be coated with neurilemma (allows for healing). 90% of nervous system cells are Glial Cells These provide structural support, nutrition, fuel, insulat ...
3a handout
... A. Explain the function of the Cell body, axon, dendrite, myelin sheath, and nodes of Ranvier ...
... A. Explain the function of the Cell body, axon, dendrite, myelin sheath, and nodes of Ranvier ...
The Nervous System
... the neuron to “fire”) while others may be inhibitory (i.e. they tell the neuron not to fire). 2. Whether or not a neuron “fires” off an action potential at any particular instant depends on its ability to integrate these multiple positive and negative inputs. 3. This allows neurons to be fine-tuned ...
... the neuron to “fire”) while others may be inhibitory (i.e. they tell the neuron not to fire). 2. Whether or not a neuron “fires” off an action potential at any particular instant depends on its ability to integrate these multiple positive and negative inputs. 3. This allows neurons to be fine-tuned ...
The Senses
... All touch sensors are distorted and become leaky by the stimulus. For free endings around hair follicles, amount of bending determines the size of the generator potential, and, thus, the frequency of nerve impulses. Pain sensors, looking essentially identical, are insensitive. Most of their respons ...
... All touch sensors are distorted and become leaky by the stimulus. For free endings around hair follicles, amount of bending determines the size of the generator potential, and, thus, the frequency of nerve impulses. Pain sensors, looking essentially identical, are insensitive. Most of their respons ...
The Senses We have 5 senses: touch (including pressure) smell
... All touch sensors are distorted and become leaky by the stimulus. For free endings around hair follicles, amount of bending determines the size of the generator potential, and, thus, the frequency of nerve impulses. Pain sensors, looking essentially identical, are insensitive. Most of their response ...
... All touch sensors are distorted and become leaky by the stimulus. For free endings around hair follicles, amount of bending determines the size of the generator potential, and, thus, the frequency of nerve impulses. Pain sensors, looking essentially identical, are insensitive. Most of their response ...
the physiological approach
... Na+ channels inactivate (absolute refractory period) – completely unresponsive to a second stimulus Potassium flows out of the axon ...
... Na+ channels inactivate (absolute refractory period) – completely unresponsive to a second stimulus Potassium flows out of the axon ...
04 Sensation and perception
... As the oval window vibrates from the increased pressure, the fluid in the coiled, tubular cochlea (inner ear) begins to vibrate the membrane of the cochlea (basilar membrane) which, in turn, bends fine, hairlike cells on its surface. These auditory receptors generate miniature electrical forces whic ...
... As the oval window vibrates from the increased pressure, the fluid in the coiled, tubular cochlea (inner ear) begins to vibrate the membrane of the cochlea (basilar membrane) which, in turn, bends fine, hairlike cells on its surface. These auditory receptors generate miniature electrical forces whic ...
pttx
... To Remember When an AP depolarizes the membrane at the synaptic terminal it 2) opens voltage-gated Ca++ channels, 3) the Ca++ that gets in causes vesicles full of neuro-transmitter to empty (4). The neurotransmitter binds to ligand-gated ion channels. The result is a post-synaptic potential (PSP). ...
... To Remember When an AP depolarizes the membrane at the synaptic terminal it 2) opens voltage-gated Ca++ channels, 3) the Ca++ that gets in causes vesicles full of neuro-transmitter to empty (4). The neurotransmitter binds to ligand-gated ion channels. The result is a post-synaptic potential (PSP). ...
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.