![II. ORGANIZATION OF THE HUMAN NERVOUS](http://s1.studyres.com/store/data/009361449_1-78e38f121dedb81e7cca6b2f0382e2d1-300x300.png)
II. ORGANIZATION OF THE HUMAN NERVOUS
... Cell Body – Contains the _nucleus______. Site of _metabolic_____ activity. Receives impulse from _dendrite______. Axon – Transmits impulses _away from the cell body______ to next cell. Usually a long, single fiber with many small tips called _axon terminals_________. Schwann Cells – Wrap aroun ...
... Cell Body – Contains the _nucleus______. Site of _metabolic_____ activity. Receives impulse from _dendrite______. Axon – Transmits impulses _away from the cell body______ to next cell. Usually a long, single fiber with many small tips called _axon terminals_________. Schwann Cells – Wrap aroun ...
Types of Receptors
... located on the roof of the nasal cavity • They are neurons with tiny knobs at their ends covered with cilia • Chemicals that stimulate these cells enter as gases. They must partially dissolve in the fluid surrounding the cells to be detected • Olfactory cells undergo adaptation rapidly for a particu ...
... located on the roof of the nasal cavity • They are neurons with tiny knobs at their ends covered with cilia • Chemicals that stimulate these cells enter as gases. They must partially dissolve in the fluid surrounding the cells to be detected • Olfactory cells undergo adaptation rapidly for a particu ...
Chapter 3
... • Make cell more or less polarized – hyperpolarization = membrane has become more negative – depolarization = membrane has become less negative • “Graded” means they vary in amplitude (size), depending upon strength of stimulus • Are decremental because they die out as they travel further from their ...
... • Make cell more or less polarized – hyperpolarization = membrane has become more negative – depolarization = membrane has become less negative • “Graded” means they vary in amplitude (size), depending upon strength of stimulus • Are decremental because they die out as they travel further from their ...
Nervous System - Phoenix Union High School District
... B) Peripheral nervous system (PNS) – cranial and spinal nerves – carries messages to and from the body to the spinal cord & brain ...
... B) Peripheral nervous system (PNS) – cranial and spinal nerves – carries messages to and from the body to the spinal cord & brain ...
Second exam study questions
... 4.What is the functional anatomy of an olfactory receptor cell? How many types of olfactory receptors are there? How is olfactory information carried to and within the brain? 5.What is the functional anatomy of a taste receptor cell? What are the types of taste receptors and what they respond to? Ho ...
... 4.What is the functional anatomy of an olfactory receptor cell? How many types of olfactory receptors are there? How is olfactory information carried to and within the brain? 5.What is the functional anatomy of a taste receptor cell? What are the types of taste receptors and what they respond to? Ho ...
Nervous System 4/28/09
... 1. Receiving info – inside and outside body 2. Responding to info – reaction to stimulus (change/signal) 3. Maintaining homeostasis ...
... 1. Receiving info – inside and outside body 2. Responding to info – reaction to stimulus (change/signal) 3. Maintaining homeostasis ...
Neurotransmission Notes
... All-or-none effect – if the signal hits threshold, the signal is sent at the same strength regardless of initial stimulus. How does our brain interpret the intensity of the stimulus? The greater the frequency of action potentials, the greater the stimulus. ...
... All-or-none effect – if the signal hits threshold, the signal is sent at the same strength regardless of initial stimulus. How does our brain interpret the intensity of the stimulus? The greater the frequency of action potentials, the greater the stimulus. ...
The Nervous System
... – Released at presynaptic membrane – Affect receptors of postsynaptic membrane ...
... – Released at presynaptic membrane – Affect receptors of postsynaptic membrane ...
Slide 1
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
Ch 13 - lanoue
... Other Receptors • We also have receptors that respond to light such as those in the retina of the eye called ________________ • Those that allow us to smell or taste called __________________ • Some that tell indicate potentially dangerous stimuli (i.e., searing heat, extreme cold, excessive pressu ...
... Other Receptors • We also have receptors that respond to light such as those in the retina of the eye called ________________ • Those that allow us to smell or taste called __________________ • Some that tell indicate potentially dangerous stimuli (i.e., searing heat, extreme cold, excessive pressu ...
Nervous System
... impulses At resting potential the axon has negative voltage Action potential gated channels allow positive sodium ions to move freely into axon, voltage becomes positive. Myelinated axons: action potential concentrated at the nodes. ...
... impulses At resting potential the axon has negative voltage Action potential gated channels allow positive sodium ions to move freely into axon, voltage becomes positive. Myelinated axons: action potential concentrated at the nodes. ...
Document
... __B__9. What is the function of neurotransmitters? a. builds new neurons b. chemically link neurons across the synapse to conduct impulses c. push sodium ions across the plasma membrane d. increases the speed of the impulse along the axon __B__10. The minimum level of a stimulus that is required to ...
... __B__9. What is the function of neurotransmitters? a. builds new neurons b. chemically link neurons across the synapse to conduct impulses c. push sodium ions across the plasma membrane d. increases the speed of the impulse along the axon __B__10. The minimum level of a stimulus that is required to ...
Senses presentation
... Physiology of Taste •Process of Taste •Molecules are dissolved in saliva. •Substance enters taste pore and attaches to chemoreceptor molecule •Depolarization of the taste cell. •Taste cells have no axons but release ...
... Physiology of Taste •Process of Taste •Molecules are dissolved in saliva. •Substance enters taste pore and attaches to chemoreceptor molecule •Depolarization of the taste cell. •Taste cells have no axons but release ...
Powerpoint - Center Grove Community School
... • But new dendrites can grow • Provides room for more connections to other neurons • New connections are basis for learning ...
... • But new dendrites can grow • Provides room for more connections to other neurons • New connections are basis for learning ...
Nervous System - Academic Computer Center
... Neurotransmitter effects are terminated in three ways: degradation by enzymes from the postsynaptic cell or within the synaptic cleft; reuptake by astrocytes or the presynaptic cell; or diffusion away from the synapse. ...
... Neurotransmitter effects are terminated in three ways: degradation by enzymes from the postsynaptic cell or within the synaptic cleft; reuptake by astrocytes or the presynaptic cell; or diffusion away from the synapse. ...
Peripheral nervous system
... • myelinated + larger axon diamter >> fast action potential transmission Synapse Intercellular junction between dendrites and soma • electrical synapse - uses direct cytoplasmic connections ...
... • myelinated + larger axon diamter >> fast action potential transmission Synapse Intercellular junction between dendrites and soma • electrical synapse - uses direct cytoplasmic connections ...
Neural Control II
... – Chemical synapses – electrical impulses must be converted to a chemical signal that crosses the synapse; more common in vertebrates ...
... – Chemical synapses – electrical impulses must be converted to a chemical signal that crosses the synapse; more common in vertebrates ...
Module overview
... – Resolution is defined by how close points can be and still be distinguished in the representation.! Large RF makes it difficult to associate different ...
... – Resolution is defined by how close points can be and still be distinguished in the representation.! Large RF makes it difficult to associate different ...
Neuroscience 5a – Touch and Proprioception
... Slow adapting receptors: these are generally receptors that are associated with pressure. They constantly fire action potentials and change in frequency depending on the strength of the stimulus. These include: Merkle’s Corpuscle – touch Ruffini Corpuscle – pressure Receptor – Modified terminals ...
... Slow adapting receptors: these are generally receptors that are associated with pressure. They constantly fire action potentials and change in frequency depending on the strength of the stimulus. These include: Merkle’s Corpuscle – touch Ruffini Corpuscle – pressure Receptor – Modified terminals ...
Powerpoint
... Ionotropic & Metabotropic Ionotropic receptor binding opens hole ions flow through ...
... Ionotropic & Metabotropic Ionotropic receptor binding opens hole ions flow through ...
1. Cell body - greinerudsd
... • The terminals contain tiny sacs (vesicles) that contain neurotransmitters chemical signals • Impulse triggers release of neurotransmitters into the synaptic cleft (via exocytosis) – Neurotransmitters diffuse across gap & bind to receptors on the adjacent neuron – Cause the impulse to continue (i ...
... • The terminals contain tiny sacs (vesicles) that contain neurotransmitters chemical signals • Impulse triggers release of neurotransmitters into the synaptic cleft (via exocytosis) – Neurotransmitters diffuse across gap & bind to receptors on the adjacent neuron – Cause the impulse to continue (i ...
6.5 Neurons and Synapses - Mr Cartlidge`s Saigon Science Blog
... Neurons transmit electrical impulses. The myelination of nerve fibres allows for saltatory conduction. Neurons pump sodium and potassium ions across their membranes to generate a resting potential. An action potential consists of depolarization and repolarization of the neuron. Nerve impulses are ac ...
... Neurons transmit electrical impulses. The myelination of nerve fibres allows for saltatory conduction. Neurons pump sodium and potassium ions across their membranes to generate a resting potential. An action potential consists of depolarization and repolarization of the neuron. Nerve impulses are ac ...
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.