THE NERVOUS SYSTEM
... Þ Potassium channels open more slowly than sodium channels, but remain open and functional until the end of the action potential Þ The process of an action potential goes as follows: 1) Most voltage-gated sodium channels are closed when the membrane of the axon is at resting potential, some potassiu ...
... Þ Potassium channels open more slowly than sodium channels, but remain open and functional until the end of the action potential Þ The process of an action potential goes as follows: 1) Most voltage-gated sodium channels are closed when the membrane of the axon is at resting potential, some potassiu ...
A.L. Wafa`a sameer 2014 Nervous System/ Physiology Nervous system
... hypothalamus where impulses are relay again to autonomic neurons . In addition , the cerebral cortex itself can stimulate autonomic activity by exciting one of these centers . Sensory information from the internal organs travels along the vagus nerve & some afferent fibers of the spinal nerves to ce ...
... hypothalamus where impulses are relay again to autonomic neurons . In addition , the cerebral cortex itself can stimulate autonomic activity by exciting one of these centers . Sensory information from the internal organs travels along the vagus nerve & some afferent fibers of the spinal nerves to ce ...
Dr Alastair Smith_Pre and Post race Exam
... Respiration will also elevate during exercise; the ability to expand the lungs to maximum capacity during exercise is hindered by the action of the diaphragm and the demands for oxygen, consequently the breathing is faster but not as deep as during rest. Overheated greyhounds will pant to assist ...
... Respiration will also elevate during exercise; the ability to expand the lungs to maximum capacity during exercise is hindered by the action of the diaphragm and the demands for oxygen, consequently the breathing is faster but not as deep as during rest. Overheated greyhounds will pant to assist ...
Systems Neuroscience Auditory system
... The up-and-down motion of the basilar membrane causes the organ of Corti to vibrate up-and-down, which, in turn causes the stereocilia to bend back-and-forth. Polarization of the stereocilia (B) When the organ of Corti moves upward, the stereocilia bend away from the limbus and ...
... The up-and-down motion of the basilar membrane causes the organ of Corti to vibrate up-and-down, which, in turn causes the stereocilia to bend back-and-forth. Polarization of the stereocilia (B) When the organ of Corti moves upward, the stereocilia bend away from the limbus and ...
Neurophysiology – Action Potential, Nerve Impulse, and Synapses
... the postsynaptic neuron's threshold may be reached, and a nerve impulse will be triggered. If most of the neurotransmitters released are inhibitory, no impulse will be initiated. C. Neurotransmitters Some of neurons release only one type of neurotransmitter, while others produce two or three differe ...
... the postsynaptic neuron's threshold may be reached, and a nerve impulse will be triggered. If most of the neurotransmitters released are inhibitory, no impulse will be initiated. C. Neurotransmitters Some of neurons release only one type of neurotransmitter, while others produce two or three differe ...
Document
... nerve processes and cells of effector organs. Neuroglia are nonreactive nerve cells. REF: 1-22 34. Which of the following is/are true statements about neuroglia? a. Neuroglia are nonreactive cells that fulfill a supportive role. b. Neuroglia maintain homeostasis in the extracellular environment. c. ...
... nerve processes and cells of effector organs. Neuroglia are nonreactive nerve cells. REF: 1-22 34. Which of the following is/are true statements about neuroglia? a. Neuroglia are nonreactive cells that fulfill a supportive role. b. Neuroglia maintain homeostasis in the extracellular environment. c. ...
1-1 Test Bank Liebgott: The Anatomical Basis of Dentistry, 3rd
... nerve processes and cells of effector organs. Neuroglia are nonreactive nerve cells. REF: 1-22 34. Which of the following is/are true statements about neuroglia? a. Neuroglia are nonreactive cells that fulfill a supportive role. b. Neuroglia maintain homeostasis in the extracellular environment. c. ...
... nerve processes and cells of effector organs. Neuroglia are nonreactive nerve cells. REF: 1-22 34. Which of the following is/are true statements about neuroglia? a. Neuroglia are nonreactive cells that fulfill a supportive role. b. Neuroglia maintain homeostasis in the extracellular environment. c. ...
Regulation of Respiration
... ultimate goal of respiration is to maintain proper concentrations of O2, CO2 & H+ in the tissues CO2 or H+ act directly on the respiratory center O2 does not have a significant direct effect – acts almost entirely on peripheral chemoreceptors (carotid and aortic bodies) ...
... ultimate goal of respiration is to maintain proper concentrations of O2, CO2 & H+ in the tissues CO2 or H+ act directly on the respiratory center O2 does not have a significant direct effect – acts almost entirely on peripheral chemoreceptors (carotid and aortic bodies) ...
35 | the nervous system
... contains a specialized structure, the axon hillock that integrates signals from multiple synapses and serves as a junction between the cell body and an axon. An axon is a tube-like structure that propagates the integrated signal to specialized endings called axon terminals. These terminals in turn s ...
... contains a specialized structure, the axon hillock that integrates signals from multiple synapses and serves as a junction between the cell body and an axon. An axon is a tube-like structure that propagates the integrated signal to specialized endings called axon terminals. These terminals in turn s ...
Somatosensory system.
... • Because of their location in the skin and the nature of their specialisations, different encapsulated receptor types have different forms of cutaneous sensitivity • This was first discovered not by looking at receptors themselves but by recording from single CUTANEOUS AFFERENT FIBRES (can be done ...
... • Because of their location in the skin and the nature of their specialisations, different encapsulated receptor types have different forms of cutaneous sensitivity • This was first discovered not by looking at receptors themselves but by recording from single CUTANEOUS AFFERENT FIBRES (can be done ...
Slide 1
... Importantly, by using differently pigmented embryos, one can show that the majority of the nervous system in this new dorsal axis is not derived from the transplanted tissue, but rather from host tissue, fated to give rise to ventral tissues in the absence of a graft. Copyright © 2014 Elsevier Inc. ...
... Importantly, by using differently pigmented embryos, one can show that the majority of the nervous system in this new dorsal axis is not derived from the transplanted tissue, but rather from host tissue, fated to give rise to ventral tissues in the absence of a graft. Copyright © 2014 Elsevier Inc. ...
10.6: Cell Membrane Potential
... a process called summation • More EPSPs lead to greater probability of an action potential ...
... a process called summation • More EPSPs lead to greater probability of an action potential ...
tractus corticomuscularis
... unification and regulation of different physiological processes. That means that nervous system unites, integrates and subordinates all the parts of human body and provides its connection with environment ...
... unification and regulation of different physiological processes. That means that nervous system unites, integrates and subordinates all the parts of human body and provides its connection with environment ...
Nervous Tissue
... b. have a single process extending from the cell body c. located in the eye and nasal cavity d. have no dendrites ...
... b. have a single process extending from the cell body c. located in the eye and nasal cavity d. have no dendrites ...
File
... current exceeds the threshold, a neuron will fire. If the depolarizing current fails to exceed the threshold, a neuron will not fire. Intensity of an action potential remains the same throughout the length of the axon. ...
... current exceeds the threshold, a neuron will fire. If the depolarizing current fails to exceed the threshold, a neuron will not fire. Intensity of an action potential remains the same throughout the length of the axon. ...
Analogy = Computer
... A. Neuroglia (supporting cells – “nerve glue”) Central Nervous System (CNS) (most common) ...
... A. Neuroglia (supporting cells – “nerve glue”) Central Nervous System (CNS) (most common) ...
Glial Signaling Take Home Messages
... iii. Astrocytes and D-serine necessary for neuronal LTP c. D-serine binds the Gly site on neuronal NMDA receptors → ↑ LTP 2. Astrocyte signaling → ↑ LTP is limited to local astrocyte networks 3. Astrocytes are required for some types of synaptic plasticity (like LTP) 4. Human Astrocytes (hAstrocyt ...
... iii. Astrocytes and D-serine necessary for neuronal LTP c. D-serine binds the Gly site on neuronal NMDA receptors → ↑ LTP 2. Astrocyte signaling → ↑ LTP is limited to local astrocyte networks 3. Astrocytes are required for some types of synaptic plasticity (like LTP) 4. Human Astrocytes (hAstrocyt ...
Ch 15 Notes: The Autonomic Nervous System 2012
... fibers release acetylcholine and postganglionic fibers release acetylcholine or norepinephrine. The output (efferent) part of the ANS is divided into two principal parts: the SYMPATHETIC and the PARASYMPATHETIC divisions. Organs that receive impulses from both sympathetic and parasympathetic fibers ...
... fibers release acetylcholine and postganglionic fibers release acetylcholine or norepinephrine. The output (efferent) part of the ANS is divided into two principal parts: the SYMPATHETIC and the PARASYMPATHETIC divisions. Organs that receive impulses from both sympathetic and parasympathetic fibers ...
4.a. the trigeminal system
... Somatic Sensation of the Face and Head Objectives: 1. Outline the two pathways for facial sensation from the head. 2. Contrast facial sensation from the head and somatic sensation from the body. In what ways are they similar? Different? Try drawing this on the Haines atlas diagram at the end of the ...
... Somatic Sensation of the Face and Head Objectives: 1. Outline the two pathways for facial sensation from the head. 2. Contrast facial sensation from the head and somatic sensation from the body. In what ways are they similar? Different? Try drawing this on the Haines atlas diagram at the end of the ...
Axons
... • Sensation (awareness of stimulus) and perception (interpretation of the meaning of the stimulus) occur in the brain ...
... • Sensation (awareness of stimulus) and perception (interpretation of the meaning of the stimulus) occur in the brain ...
Nerve activates contraction
... Bipolar neurons – one axon and one dendrite Rare: these are sensory neurons (eye, ear) ...
... Bipolar neurons – one axon and one dendrite Rare: these are sensory neurons (eye, ear) ...
Biochemistry of Nerve Transmission - I-GaP
... 5HT5a and 5HT5B. Most of these receptors are coupled to G-proteins that affect the activities of either adenylate cyclase or phospholipase Cγ. The 5HT3 class of receptors are ion channels. Some serotonin receptors are presynaptic and others postsynaptic. The 5HT2A receptors mediate platelet aggregat ...
... 5HT5a and 5HT5B. Most of these receptors are coupled to G-proteins that affect the activities of either adenylate cyclase or phospholipase Cγ. The 5HT3 class of receptors are ion channels. Some serotonin receptors are presynaptic and others postsynaptic. The 5HT2A receptors mediate platelet aggregat ...