Psych 11Nervous System Overview
... Step 4: Neurotransmitters diffuse across the synaptic cleft (a very short distance) and bind to receptor proteins on the postsynaptic membrane. Excitatory neurotransmitters cause sodium ions to move through receptor proteins depolarizing the membrane. Inhibitory neurotransmitters do not depolarize ...
... Step 4: Neurotransmitters diffuse across the synaptic cleft (a very short distance) and bind to receptor proteins on the postsynaptic membrane. Excitatory neurotransmitters cause sodium ions to move through receptor proteins depolarizing the membrane. Inhibitory neurotransmitters do not depolarize ...
muscles
... Cardiac Muscle • Same mechanism as skeletal • Less calcium stored but longer T-tubules & more released with a single impulse • Impulses travel rapidly from cell to cell so it is self-stimulating ...
... Cardiac Muscle • Same mechanism as skeletal • Less calcium stored but longer T-tubules & more released with a single impulse • Impulses travel rapidly from cell to cell so it is self-stimulating ...
Test 5 Study Guide
... The sympathetic division of the autonomic nervous system (thoracolumbar division) functions during “fight or flight.” During sympathetic activation, elevated heart rate, elevated blood pressure, sweating, elevated blood glucose , dilation of the pupils, increased blood flow to skeletal muscles. Post ...
... The sympathetic division of the autonomic nervous system (thoracolumbar division) functions during “fight or flight.” During sympathetic activation, elevated heart rate, elevated blood pressure, sweating, elevated blood glucose , dilation of the pupils, increased blood flow to skeletal muscles. Post ...
Ch. 35.2
... TOWARD the cell body Long fibers AXON carry impulses AWAY from the cell body Neurons may have many dendrites by only one axon Form NERVES when axons and dendrites are clustered together ...
... TOWARD the cell body Long fibers AXON carry impulses AWAY from the cell body Neurons may have many dendrites by only one axon Form NERVES when axons and dendrites are clustered together ...
7-6_TheGenOfSpecResp_MajorosMyrtill
... in a continuous loop. Conscious movement comes from impulses in the brain travelling down the spinal cord, over this loop, and then back to the brain for processing. However, the stretch reflex skips the brain portion of the trip and follows the simple loop from muscle to spinal cord and back, makin ...
... in a continuous loop. Conscious movement comes from impulses in the brain travelling down the spinal cord, over this loop, and then back to the brain for processing. However, the stretch reflex skips the brain portion of the trip and follows the simple loop from muscle to spinal cord and back, makin ...
Answers to WHAT DID YOU LEARN questions
... hemisphere contains the general interpretive and speech centers, and is specialized for language abilities as well as analytical and reasoning tasks. The other hemisphere, usually the right, is called the representational hemisphere, because it is concerned with spatial relationships. It relates the ...
... hemisphere contains the general interpretive and speech centers, and is specialized for language abilities as well as analytical and reasoning tasks. The other hemisphere, usually the right, is called the representational hemisphere, because it is concerned with spatial relationships. It relates the ...
Autonomic Nervous System (ANS)
... axons of pregg Σ neurons exit with spinal nerves into “white” ramus (part of rami communicantes) to travel to: sympathetic chain ganglion, or collateral (prevertebral) ganglion,& adrenal medulla pregg Σ fibers release Ach postgg Σ neurons usually release norepinephrine (NE) effects on ...
... axons of pregg Σ neurons exit with spinal nerves into “white” ramus (part of rami communicantes) to travel to: sympathetic chain ganglion, or collateral (prevertebral) ganglion,& adrenal medulla pregg Σ fibers release Ach postgg Σ neurons usually release norepinephrine (NE) effects on ...
Anterior Abdomen - lesson plan 2015
... 6. Identify the vertebral levels of the umbilicus, subcostal plane, and transtubercular plane 7. Describe the layers of fascia seen in the abdomen, both superior to and inferior to the umbilicus 8. Define the following components of the nervous system: cervical and lumbar enlargements, conus medulla ...
... 6. Identify the vertebral levels of the umbilicus, subcostal plane, and transtubercular plane 7. Describe the layers of fascia seen in the abdomen, both superior to and inferior to the umbilicus 8. Define the following components of the nervous system: cervical and lumbar enlargements, conus medulla ...
FIGURE LEGENDS FIGURE 19.1 Evidence of synapse elimination
... silver stainmade by J. Boeke in 1932 of the motor nerve terminals converging on two adjacent muscle fibers from the tongue muscle of a 4-day-old mouse. Each fiber is innervated by endings fromseveral different axons (see arrows). (B) Photomicrograph of several adult muscle fibers from the rat extens ...
... silver stainmade by J. Boeke in 1932 of the motor nerve terminals converging on two adjacent muscle fibers from the tongue muscle of a 4-day-old mouse. Each fiber is innervated by endings fromseveral different axons (see arrows). (B) Photomicrograph of several adult muscle fibers from the rat extens ...
how seacure helps clearing - SeaCure Custom Mouthpiece
... back of the throat. This end is usually closed but can be opened by jaw movement and the action of “clearing”. As the diver moves deeper the increasing pressure must be equalized to avoid pain or even damage to the eardrum. The muscle that assists in the opening of the Eustachian tube is called the ...
... back of the throat. This end is usually closed but can be opened by jaw movement and the action of “clearing”. As the diver moves deeper the increasing pressure must be equalized to avoid pain or even damage to the eardrum. The muscle that assists in the opening of the Eustachian tube is called the ...
Abnormal Electric Activity Insertional Activity --Normal is 100
... --commonly high amplitude with poor recruitment --occur when there is an increase in number of fibers in a unit or loss of synchrony of firing fibers --seen in: motor neuron diseases, axonal neuropathies with collateral sprouting, chronic radiculopathies, chronic mononeuropathies, residual of neurop ...
... --commonly high amplitude with poor recruitment --occur when there is an increase in number of fibers in a unit or loss of synchrony of firing fibers --seen in: motor neuron diseases, axonal neuropathies with collateral sprouting, chronic radiculopathies, chronic mononeuropathies, residual of neurop ...
Acetylcholine-dopamine balance hypothesis: an update Toshihiko
... tonically active cholinergic interneurons in the striatum through the thalamo- and corticostriatal pathways. The pause response is made possible by a concomitant increase of firing frequency of the dopaminergic neurons, which dramatically increases the release of dopamine only in the projection area ...
... tonically active cholinergic interneurons in the striatum through the thalamo- and corticostriatal pathways. The pause response is made possible by a concomitant increase of firing frequency of the dopaminergic neurons, which dramatically increases the release of dopamine only in the projection area ...
Nervous System Student Notes
... Nervous Tissue Physiology - Two major functional properties of neurons resulting in electrochemical event A. Irritability: a. Define: ________________________________________________________ B. Conductivity: Memorize synaptic cleft diagram ...
... Nervous Tissue Physiology - Two major functional properties of neurons resulting in electrochemical event A. Irritability: a. Define: ________________________________________________________ B. Conductivity: Memorize synaptic cleft diagram ...
CHAPTER NINE: THE NERVOUS SYSTEM
... 1. ________ terminal of the presynaptic neuron 2. ___________ region on the postsynaptic neuron g. Synaptic cleft i. Fluid-filled space separating the presynaptic and postsynaptic neurons ii. Prevents nerve impulses from ___________ passing from one neuron to the next iii. Transmission across the sy ...
... 1. ________ terminal of the presynaptic neuron 2. ___________ region on the postsynaptic neuron g. Synaptic cleft i. Fluid-filled space separating the presynaptic and postsynaptic neurons ii. Prevents nerve impulses from ___________ passing from one neuron to the next iii. Transmission across the sy ...
Neuromuscular junction
A neuromuscular junction (sometimes called a myoneural junction) is a junction between nerve and muscle; it is a chemical synapse formed by the contact between the presynaptic terminal of a motor neuron and the postsynaptic membrane of a muscle fiber. It is at the neuromuscular junction that a motor neuron is able to transmit a signal to the muscle fiber, causing muscle contraction.Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy. Synaptic transmission at the neuromuscular junction begins when an action potential reaches the presynaptic terminal of a motor neuron, which activates voltage-dependent calcium channels to allow calcium ions to enter the neuron. Calcium ions bind to sensor proteins (synaptotagmin) on synaptic vesicles, triggering vesicle fusion with the cell membrane and subsequent neurotransmitter release from the motor neuron into the synaptic cleft. In vertebrates, motor neurons release acetylcholine (ACh), a small molecule neurotransmitter, which diffuses across the synaptic cleft and binds to nicotinic acetylcholine receptors (nAChRs) on the cell membrane of the muscle fiber, also known as the sarcolemma. nAChRs are ionotropic receptors, meaning they serve as ligand-gated ion channels. The binding of ACh to the receptor can depolarize the muscle fiber, causing a cascade that eventually results in muscle contraction.Neuromuscular junction diseases can be of genetic and autoimmune origin. Genetic disorders, such as Duchenne muscular dystrophy, can arise from mutated structural proteins that comprise the neuromuscular junction, whereas autoimmune diseases, such as myasthenia gravis, occur when antibodies are produced against nicotinic acetylcholine receptors on the sarcolemma.