34-Sensory-Mechanism
... Five categories • Mechanoreceptors - muscle spindle - hair cell in ear • Pain receptors (nociceptors) • Thermoreceptors • Chemoreceptors - gustatory (taste) - olfactory (smell) • Electromagnetic receptors - photoreceptors ...
... Five categories • Mechanoreceptors - muscle spindle - hair cell in ear • Pain receptors (nociceptors) • Thermoreceptors • Chemoreceptors - gustatory (taste) - olfactory (smell) • Electromagnetic receptors - photoreceptors ...
The Reflex Arc
... A. Stimulus – any change in the environment that causes a response (reaction). Ex: light, temperature, pressure. B. Response – the action or movement resulting from a stimulus. ...
... A. Stimulus – any change in the environment that causes a response (reaction). Ex: light, temperature, pressure. B. Response – the action or movement resulting from a stimulus. ...
List of vocabulary used in understanding the nervous
... e. Students know the roles of sensory neurons, interneurons, and motor neurons in sensation, thought, and response. An individual becomes aware of the environment through the sense organs and other body receptors (e.g., by allowing for touch, taste, and smell and by collecting information about temp ...
... e. Students know the roles of sensory neurons, interneurons, and motor neurons in sensation, thought, and response. An individual becomes aware of the environment through the sense organs and other body receptors (e.g., by allowing for touch, taste, and smell and by collecting information about temp ...
Lectures220Week7Note..
... Specific sensory cells with specific receptors project to specific parts of the thamalus…which project to specific parts of cortex. LABELED LINE. ...
... Specific sensory cells with specific receptors project to specific parts of the thamalus…which project to specific parts of cortex. LABELED LINE. ...
Part 1 (nerve impulses, ppt file)
... and does in the heart. You can detect the changes in potential caused by this depolarization wave by using conductors placed on the body. This is called an electrocardiogram ...
... and does in the heart. You can detect the changes in potential caused by this depolarization wave by using conductors placed on the body. This is called an electrocardiogram ...
Answers to Questions — neurons
... 2. What might happen if a drug blocked neurotransmitter receptors? Neurotransmitters would not be able to bind with the receptors and initiate impulses in the neuron. 3. Hyponatremia occurs when people have very low amounts of sodium in their body. How might the nervous system be affected if the per ...
... 2. What might happen if a drug blocked neurotransmitter receptors? Neurotransmitters would not be able to bind with the receptors and initiate impulses in the neuron. 3. Hyponatremia occurs when people have very low amounts of sodium in their body. How might the nervous system be affected if the per ...
Chapter 6
... Receptor cell releases chemical messenger Chemical messenger opens ion channels in afferent neuron AP generating region If threshold reached, AP is generated . ...
... Receptor cell releases chemical messenger Chemical messenger opens ion channels in afferent neuron AP generating region If threshold reached, AP is generated . ...
nervous system
... Neuron cell bodies are clustered together in the PNS= ganglia Satellite cells- surround neuron cell bodies, regulate environment Schwann cells- form a sheath around every axon, can myelinate axons ...
... Neuron cell bodies are clustered together in the PNS= ganglia Satellite cells- surround neuron cell bodies, regulate environment Schwann cells- form a sheath around every axon, can myelinate axons ...
Types of neurons - Brigham Young University
... An AP reaches the axon terminal of the presynaptic cell and causes V-gated Ca2+ channels to open. Ca2+ rushes in, binds to regulatory proteins & initiates NT exocytosis. NTs diffuse across the synaptic cleft and then bind to receptors on the postsynaptic membrane and initiate some sort of resp ...
... An AP reaches the axon terminal of the presynaptic cell and causes V-gated Ca2+ channels to open. Ca2+ rushes in, binds to regulatory proteins & initiates NT exocytosis. NTs diffuse across the synaptic cleft and then bind to receptors on the postsynaptic membrane and initiate some sort of resp ...
Chapter 48 Reading Guide and Key Terms
... Suppose you treated a neuron with a drug that specifically disables the sodiumpotassium pump. What change in the resting potential would you expect? ...
... Suppose you treated a neuron with a drug that specifically disables the sodiumpotassium pump. What change in the resting potential would you expect? ...
PNS and Transmission
... • Transmission is carried out by molecules called neurotransmitters. These are stored in vesicles in the axon terminals. • Impulse reaches terminal opens calcium channels Calcium enters the terminal vesicles move toward membrane for exocytosis neurotransmitters are released and diffuse throug ...
... • Transmission is carried out by molecules called neurotransmitters. These are stored in vesicles in the axon terminals. • Impulse reaches terminal opens calcium channels Calcium enters the terminal vesicles move toward membrane for exocytosis neurotransmitters are released and diffuse throug ...
Peripheral Nervous System
... Sensory neuron communicates with motor neuron via interneuron Slight delay between stimulus & response i.e.: Withdrawl reflex ...
... Sensory neuron communicates with motor neuron via interneuron Slight delay between stimulus & response i.e.: Withdrawl reflex ...
Ch 9 Sensory System
... are housed in specialized organs • ear = hearing & equilibrium • eye = vision • tongue = taste • nose = olfaction (smell) ...
... are housed in specialized organs • ear = hearing & equilibrium • eye = vision • tongue = taste • nose = olfaction (smell) ...
Nervous and Endocrine Systems
... Life ch 19 – Nervous and Endocrine Systems Aim: parts of the nervous system Response to stimuli Stimuli – _____ Homeostasis – _____ Breathing, heart rate, digestion Neurons – nerve cells (3 parts) _____ _____ – receive messages and give to cell body (can collect from many sources) _____ – ...
... Life ch 19 – Nervous and Endocrine Systems Aim: parts of the nervous system Response to stimuli Stimuli – _____ Homeostasis – _____ Breathing, heart rate, digestion Neurons – nerve cells (3 parts) _____ _____ – receive messages and give to cell body (can collect from many sources) _____ – ...
Lecture 2 - Nerve Impulse
... Na+ ions move to the inside of the axon. - Repolarization - When the inside of the axon becomes negative again, after AP. K+ ions move to the outside of cell. Neuron can’t respond to new stimuli. ...
... Na+ ions move to the inside of the axon. - Repolarization - When the inside of the axon becomes negative again, after AP. K+ ions move to the outside of cell. Neuron can’t respond to new stimuli. ...
Action Potential revisited When a stimulus reaches threshold level
... Neurotransmitters are chemicals that alter the membrane potentials of postsynaptic neurons. Acetylcholine is a neurotransmitter found in the end plates of many nerve cells. It acts as an excitatory neurotransmitter on many postsynaptic neurons by opening Sodium ion channels. ...
... Neurotransmitters are chemicals that alter the membrane potentials of postsynaptic neurons. Acetylcholine is a neurotransmitter found in the end plates of many nerve cells. It acts as an excitatory neurotransmitter on many postsynaptic neurons by opening Sodium ion channels. ...
File - Mr. Haan`s Science
... a. Nerve cells at rest b. Higher concentration of Na+ outside and higher conc. of K+ inside membrane c. Na+K+ pump works d. K+ diffuses out quickly causing the outside to be + and inside to be – in comparison e. Resting potential = difference in charges ...
... a. Nerve cells at rest b. Higher concentration of Na+ outside and higher conc. of K+ inside membrane c. Na+K+ pump works d. K+ diffuses out quickly causing the outside to be + and inside to be – in comparison e. Resting potential = difference in charges ...
The Nervous Systeminofnotes
... • 4. The motor neuron sends the message to the muscles to carry out your response. ...
... • 4. The motor neuron sends the message to the muscles to carry out your response. ...
Ch 48: Nervous System – part 1
... How do action potentials “travel” along an axon? the strong depolarization of one action potential assures that the neighboring region of the neuron will be depolarized above threshold, triggering a new action potential, and so on… SYNAPSE: junction between a neuron and another cell; found betwe ...
... How do action potentials “travel” along an axon? the strong depolarization of one action potential assures that the neighboring region of the neuron will be depolarized above threshold, triggering a new action potential, and so on… SYNAPSE: junction between a neuron and another cell; found betwe ...
The role of the nervous system in detecting and
... The role of the nervous system in detecting and responding to stimuli Detecting and responding in animals A complex animal may need to respond immediately to a stimulus. In many situations, it is important that a change is detected instantly and appropriate signals sent quickly to relevant parts of ...
... The role of the nervous system in detecting and responding to stimuli Detecting and responding in animals A complex animal may need to respond immediately to a stimulus. In many situations, it is important that a change is detected instantly and appropriate signals sent quickly to relevant parts of ...
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.