Fundamental Types of Neurons
... • Local disturbances in membrane potential – occur when neuron is stimulated by chemicals, light, heat or mechanical disturbance – depolarization decreases potential across cell membrane due to opening of gated Na+ channels • Na+ rushes in down concentration and electrical gradients • Na+ diffuses f ...
... • Local disturbances in membrane potential – occur when neuron is stimulated by chemicals, light, heat or mechanical disturbance – depolarization decreases potential across cell membrane due to opening of gated Na+ channels • Na+ rushes in down concentration and electrical gradients • Na+ diffuses f ...
The Neural Control of Behavior
... information rapidly from one place to another and/or integrating information from various ...
... information rapidly from one place to another and/or integrating information from various ...
05First2yrsBiosocial
... (Automatic responses) Heartbeat Breathing Temperature Brain Stem Thinking Feeling Sensing ...
... (Automatic responses) Heartbeat Breathing Temperature Brain Stem Thinking Feeling Sensing ...
SChapter 12
... ▪There are five important membrane processes that will be discussed: 1) All living cells have a transmembrane potential that varies depending on the activities of the cell. 2) A typical stimulus can produce a local graded potential, which decreases with distance from the stimulus. 3) A large graded ...
... ▪There are five important membrane processes that will be discussed: 1) All living cells have a transmembrane potential that varies depending on the activities of the cell. 2) A typical stimulus can produce a local graded potential, which decreases with distance from the stimulus. 3) A large graded ...
Nervous System - EMTStudyCenter.com
... responses to changes. 6. The different charge between the outside and the inside of a neuron at rest is called action potential. synaptic potential. resting membrane potential. equilibrium potential. 7. The stage in an action potential that immediately follows depolarization is polarization. repolar ...
... responses to changes. 6. The different charge between the outside and the inside of a neuron at rest is called action potential. synaptic potential. resting membrane potential. equilibrium potential. 7. The stage in an action potential that immediately follows depolarization is polarization. repolar ...
Nervous System Vocab1 - Everglades High School
... 30. Ganglia: Small collection of cell bodies outside of the CNS 31. White Matter: Dense collection of myelinated fibers 32. Gray Matter: contains mostly unmyelinated fibers and cell bodies 33. Polarized: The plasma membrane of a resting inactive neuron 34. Depolarization: The inward rush of sodium i ...
... 30. Ganglia: Small collection of cell bodies outside of the CNS 31. White Matter: Dense collection of myelinated fibers 32. Gray Matter: contains mostly unmyelinated fibers and cell bodies 33. Polarized: The plasma membrane of a resting inactive neuron 34. Depolarization: The inward rush of sodium i ...
4-5_Chem_postsyn_KolozsvariB
... The neurotransmitter diffuses within the cleft. Some of it escapes, but some of it binds to chemical receptor molecules located on the membrane of the postsynaptic cell, the opposite side of the synaptic gap. Receptors can respond in either of two general ways, and this response is the key step by w ...
... The neurotransmitter diffuses within the cleft. Some of it escapes, but some of it binds to chemical receptor molecules located on the membrane of the postsynaptic cell, the opposite side of the synaptic gap. Receptors can respond in either of two general ways, and this response is the key step by w ...
electrochemical impulse - Glebe
... o E.g. warm water = low frequency, hot water = high frequency 2. Different neurons have different thresholds o E.g. water at 40°C will cause one neuron to reach threshold level, but water at 60°C may cause two or more o Brain distinguishes between neural impulses Synaptic Transmission Neurons can ...
... o E.g. warm water = low frequency, hot water = high frequency 2. Different neurons have different thresholds o E.g. water at 40°C will cause one neuron to reach threshold level, but water at 60°C may cause two or more o Brain distinguishes between neural impulses Synaptic Transmission Neurons can ...
15-1 Section Summary
... both inside and outside your body. It also directs the way in which your body responds to this information. In addition, the nervous system helps in maintaining stable internal conditions. A stimulus is any change or signal in the environment that can make an organism react. Stimuli can come from th ...
... both inside and outside your body. It also directs the way in which your body responds to this information. In addition, the nervous system helps in maintaining stable internal conditions. A stimulus is any change or signal in the environment that can make an organism react. Stimuli can come from th ...
Neurons - Seung Lab
... • They can be distinguished in some types of neurons. • Dendrites receive synaptic inputs. • Axons make synapses on other ...
... • They can be distinguished in some types of neurons. • Dendrites receive synaptic inputs. • Axons make synapses on other ...
The Nervous System
... When you pull the handle, water floods the bowl. This event takes a couple of seconds and you cannot stop it in the middle. Once the bowl empties, the flush is complete. Now the upper tank is empty. If you try pulling the handle at this point, nothing happens (absolute refractory). Wait for the uppe ...
... When you pull the handle, water floods the bowl. This event takes a couple of seconds and you cannot stop it in the middle. Once the bowl empties, the flush is complete. Now the upper tank is empty. If you try pulling the handle at this point, nothing happens (absolute refractory). Wait for the uppe ...
The Nervous System
... impulses within the CNS • Motor neurons carry impulses from CNS to effectors ( EFFERENT) ...
... impulses within the CNS • Motor neurons carry impulses from CNS to effectors ( EFFERENT) ...
Chapter 9 Nervous
... Controls internal conditions; glands, smooth muscle, cardia muscle Sympathetic = fight or flight (pupils dilate, bronchi dilate, increase heart rate, etc) Parasympathetic = opposite effects (slows HR, lowers blood pressure, etc) Types of Receptors - how nervous system detects changes Heat receptors ...
... Controls internal conditions; glands, smooth muscle, cardia muscle Sympathetic = fight or flight (pupils dilate, bronchi dilate, increase heart rate, etc) Parasympathetic = opposite effects (slows HR, lowers blood pressure, etc) Types of Receptors - how nervous system detects changes Heat receptors ...
The Nervous System
... Neuron: a nerve cell; the basic building block of the nervous system Action Potential: a neural impulse; a brief electrical charge that travels down an axon **Neurons that are stimulated cause a brief electrical charge; if strong enough, the nerve fires **ALL OR NOTHING Threshold: level of stimulati ...
... Neuron: a nerve cell; the basic building block of the nervous system Action Potential: a neural impulse; a brief electrical charge that travels down an axon **Neurons that are stimulated cause a brief electrical charge; if strong enough, the nerve fires **ALL OR NOTHING Threshold: level of stimulati ...
neuron and nervous system
... Neuron: a nerve cell; the basic building block of the nervous system Action Potential: a neural impulse; a brief electrical charge that travels down an axon **Neurons that are stimulated cause a brief electrical charge; if strong enough, the nerve fires **ALL OR NOTHING Threshold: level of stimulati ...
... Neuron: a nerve cell; the basic building block of the nervous system Action Potential: a neural impulse; a brief electrical charge that travels down an axon **Neurons that are stimulated cause a brief electrical charge; if strong enough, the nerve fires **ALL OR NOTHING Threshold: level of stimulati ...
Biology Notes: The Nervous System and Neurons
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
PowerPoint
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
... taken up again by the axon terminal and recycled, or they may simply diffuse away. • NERVE GAS prevents enzymes from breaking down neurotransmitters, as a result muscles in the respiratory and nervous system becomes paralyzed. ...
ANPS 019 Beneyto-Santonja 11-07
... Somatosensation= senses detected through body Many different receptor types o Nociceptors (pain) Free nerve endings sense tissue damage, chemical signals, temperature extremes o Thermoreceptors free nerve endings sense temperature o Chemoreceptors respond to chemicals in intersititial flui ...
... Somatosensation= senses detected through body Many different receptor types o Nociceptors (pain) Free nerve endings sense tissue damage, chemical signals, temperature extremes o Thermoreceptors free nerve endings sense temperature o Chemoreceptors respond to chemicals in intersititial flui ...
bio 342 human physiology
... • Graded potentials are the result of transduction within a receptor. Transduction produces a receptor potential • Amplitude is usually in proportion to the stimulus intensity • Specialty receptor cells with no axon (visual, gustatory, auditory, and vestibular systems). The graded receptor potential ...
... • Graded potentials are the result of transduction within a receptor. Transduction produces a receptor potential • Amplitude is usually in proportion to the stimulus intensity • Specialty receptor cells with no axon (visual, gustatory, auditory, and vestibular systems). The graded receptor potential ...
Somatosensory system
... Dorsal root ganglia - spinal nerve - limb and trunk Trigeminal ganglia - cranial nerve - head and face ...
... Dorsal root ganglia - spinal nerve - limb and trunk Trigeminal ganglia - cranial nerve - head and face ...
Action Potentials
... • Sensory (afferent) neurons – _________________________ _________________________ – Transmit info to brain/spinal cord • ___________________________ – In between sensory and motor pathways in CNS – 90% of neurons are interneurons – _________________________ _________________________ • _____________ ...
... • Sensory (afferent) neurons – _________________________ _________________________ – Transmit info to brain/spinal cord • ___________________________ – In between sensory and motor pathways in CNS – 90% of neurons are interneurons – _________________________ _________________________ • _____________ ...
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.