Parts of the Nervous System
... d. uses different molecular motors e. Particles are driven along microtubules by a microtubule-associated ATPase – dynein f. The composition of the material is similar to that of the anterograde fast component and is packaged in large membrane-bound organelles ...
... d. uses different molecular motors e. Particles are driven along microtubules by a microtubule-associated ATPase – dynein f. The composition of the material is similar to that of the anterograde fast component and is packaged in large membrane-bound organelles ...
MyersExpPsych7e_IM_Module 03 garber edited
... Action Potential Properties All-or-None Response: A strong stimulus can trigger more neurons to fire, and to fire more often, but it does not affect the action potentials strength or speed. Intensity of an action potential remains the same throughout the length of the axon. ...
... Action Potential Properties All-or-None Response: A strong stimulus can trigger more neurons to fire, and to fire more often, but it does not affect the action potentials strength or speed. Intensity of an action potential remains the same throughout the length of the axon. ...
Metabotropic Neurot
... Functional Roles for mGluR • All 3 classes inhibit L-type voltage sensitive Ca2+ channels • mGluR activation also closes K+ channels, leading to slow repolarization (prolong excitation) HPC and cortex • Opposite effect in cerebellum • Pre-synaptic mGluRs are inhibitory-on both Glutamate and GABA ne ...
... Functional Roles for mGluR • All 3 classes inhibit L-type voltage sensitive Ca2+ channels • mGluR activation also closes K+ channels, leading to slow repolarization (prolong excitation) HPC and cortex • Opposite effect in cerebellum • Pre-synaptic mGluRs are inhibitory-on both Glutamate and GABA ne ...
nervous system
... 2. Describe the three parts of a reflex, noting the three types of neurons involved in the reaction 3. Explain how an action potential is produced and the resting membrane potential restored 4. Compare the structures, functions, and locations of electrical and chemical synapses 5. Describe the t ...
... 2. Describe the three parts of a reflex, noting the three types of neurons involved in the reaction 3. Explain how an action potential is produced and the resting membrane potential restored 4. Compare the structures, functions, and locations of electrical and chemical synapses 5. Describe the t ...
REFLEX PHYSIOLOGY
... Afferent input from sensory endings of muscle spindle fiber Alpha motor neuron output to regular skeletal-muscle fiber Stretch reflex pathway Gamma motor-neuron output to contractile end portions of spindle fiber Descending pathways coactivating alpha and gamma motor neurons ...
... Afferent input from sensory endings of muscle spindle fiber Alpha motor neuron output to regular skeletal-muscle fiber Stretch reflex pathway Gamma motor-neuron output to contractile end portions of spindle fiber Descending pathways coactivating alpha and gamma motor neurons ...
Overview of Synaptic Transmission
... How do the channels open and close?One suggestion is that, to exposethe channel's pore, the six connexins in a hemichannel rotate slightly with respect to one another, much like the shutter in a camera. The concerted tilting of each connexin by a few Angstroms at one end leads to a somewhat larger d ...
... How do the channels open and close?One suggestion is that, to exposethe channel's pore, the six connexins in a hemichannel rotate slightly with respect to one another, much like the shutter in a camera. The concerted tilting of each connexin by a few Angstroms at one end leads to a somewhat larger d ...
Nervous system summary
... stopped taking drugs. This is more likely to happen when a drug is taken over and over. Depressants, like alcohol, are drugs that slow down the normal function of the central nervous system (CNS) and suppress the neural activities in the brain. Depressants work by affecting the part of the brain tha ...
... stopped taking drugs. This is more likely to happen when a drug is taken over and over. Depressants, like alcohol, are drugs that slow down the normal function of the central nervous system (CNS) and suppress the neural activities in the brain. Depressants work by affecting the part of the brain tha ...
C8003 Psychobiology sample paper 2016-17
... movement into that cell GABA-A receptors have a single binding site at which GABA and alcohol interact GABA is taken up into the presynaptic cell after it acts at the receptor GABA-A receptors require second messenger systems to have their postsynaptic effect ...
... movement into that cell GABA-A receptors have a single binding site at which GABA and alcohol interact GABA is taken up into the presynaptic cell after it acts at the receptor GABA-A receptors require second messenger systems to have their postsynaptic effect ...
Chapter 12 *Lecture PowerPoint Nervous Tissue
... – Identify the parts of a neuron. – Explain how neurons transport materials between the cell body and tips of the axon. ...
... – Identify the parts of a neuron. – Explain how neurons transport materials between the cell body and tips of the axon. ...
Chapter 33 Nervous System
... Speed of action potential varies due to myelin sheath Neurons with myelin a. Carry impulses associated with sharp pain 3. Neurons without myelin a. Carry impulses associated with dull, throbbing pain vi. The synapse 1. Gap between axon of one neuron and dendrite of another axon 2. When a motor neuro ...
... Speed of action potential varies due to myelin sheath Neurons with myelin a. Carry impulses associated with sharp pain 3. Neurons without myelin a. Carry impulses associated with dull, throbbing pain vi. The synapse 1. Gap between axon of one neuron and dendrite of another axon 2. When a motor neuro ...
to Psychology 3
... - the research showed that Na and K cations and Cl anions flowed at different rates accross the cell's membrane causing an electrical potential of -70 millivolts 2. The Action Potential - the stable voltage is disrupted upon the stimulation by neurotransmitters at dendrites - channels along the axon ...
... - the research showed that Na and K cations and Cl anions flowed at different rates accross the cell's membrane causing an electrical potential of -70 millivolts 2. The Action Potential - the stable voltage is disrupted upon the stimulation by neurotransmitters at dendrites - channels along the axon ...
Structure of the Brain PowerPoint Notes
... place segment by segment as they move down the length of the axon • ____________________ – if an action potential starts at the beginning of the axon, the action potential will continue at the same speed segment to segment to the very end of the axon Sending information – ___________________________ ...
... place segment by segment as they move down the length of the axon • ____________________ – if an action potential starts at the beginning of the axon, the action potential will continue at the same speed segment to segment to the very end of the axon Sending information – ___________________________ ...
Ch. 35 Nervous System edit
... is required to activate a neuron b. All-or-none nerve impulse a stimulus stronger than the threshold produces an impulse, a stimulus that is weaker than the threshold will produce no impulse 1) like a pushing over a row of dominoes ...
... is required to activate a neuron b. All-or-none nerve impulse a stimulus stronger than the threshold produces an impulse, a stimulus that is weaker than the threshold will produce no impulse 1) like a pushing over a row of dominoes ...
SELECT THE ONE BEST ANSWER OR COMPLETION 1. A function
... (A) numerical matching of the number of presynaptic neurons and the size of postsynaptic targets (B) preferential retention of synapses that are formed by pioneer neurons (C) guidepost cells which stop axon growth (D) retaining vestigial axons that innervate inappropriate postsynaptic targets (E) ce ...
... (A) numerical matching of the number of presynaptic neurons and the size of postsynaptic targets (B) preferential retention of synapses that are formed by pioneer neurons (C) guidepost cells which stop axon growth (D) retaining vestigial axons that innervate inappropriate postsynaptic targets (E) ce ...
Nervous System I
... along the axon to a synapse. Axons have synaptic knobs at their distal ends that secrete neurotransmitters. The neurotransmitter is released when a nerve impulse reaches the end of an axon, this opens two channels Na+ and Ca2+ This surge of Ca2+ acts as a messenger, directing synaptic vesicles to em ...
... along the axon to a synapse. Axons have synaptic knobs at their distal ends that secrete neurotransmitters. The neurotransmitter is released when a nerve impulse reaches the end of an axon, this opens two channels Na+ and Ca2+ This surge of Ca2+ acts as a messenger, directing synaptic vesicles to em ...
How the Nervous System Works
... The nervous system receives information about what is happening 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 maintain homeostasis. A stimulus is any change or signal in the environment that can make ...
... The nervous system receives information about what is happening 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 maintain homeostasis. A stimulus is any change or signal in the environment that can make ...
013368718X_CH31_483-498.indd
... Neurons Nervous system impulses are transmitted by cells called neurons. The three types of neurons are sensory, motor, and interneurons. All neurons have certain features: The cell body contains the nucleus and much of the cytoplasm. Dendrites receive impulses from other neurons and carry impulses ...
... Neurons Nervous system impulses are transmitted by cells called neurons. The three types of neurons are sensory, motor, and interneurons. All neurons have certain features: The cell body contains the nucleus and much of the cytoplasm. Dendrites receive impulses from other neurons and carry impulses ...
Drugs and Toxins
... cause spastic paralysis. • Neostigmine is an anti-cholinesterase drug which reduces the symptoms by inhibiting Ach-ase activity, preventing the breakdown of Ach. Consequently, Ach levels in the synapse remain elevated, so Ach is available to bind to those few functional Ach receptors that are left. ...
... cause spastic paralysis. • Neostigmine is an anti-cholinesterase drug which reduces the symptoms by inhibiting Ach-ase activity, preventing the breakdown of Ach. Consequently, Ach levels in the synapse remain elevated, so Ach is available to bind to those few functional Ach receptors that are left. ...
7-6_TheGenOfSpecResp_MajorosMyrtill
... and back, making it very rapid sequence. When the central nervous system sends out signals to alpha neurons to fire, signals are also sent to gamma motor neurons to do the same. This process maintains the tautness of muscle spindles and is called alpha gamma co-activation. Without gamma motor neuron ...
... and back, making it very rapid sequence. When the central nervous system sends out signals to alpha neurons to fire, signals are also sent to gamma motor neurons to do the same. This process maintains the tautness of muscle spindles and is called alpha gamma co-activation. Without gamma motor neuron ...
Action Potentials
... • Membrane is hyperpolarized to –90 mV • Transmembrane potential returns to resting level • Action potential is over ...
... • Membrane is hyperpolarized to –90 mV • Transmembrane potential returns to resting level • Action potential is over ...
Notes
... When Mary focuses her attention on the animal by looking directly at it, a image of the animal is formed on the receptors of the retina of the eye. This defines the stimulus on the receptors stage. Transduction is the process of transformation of one form of energy to another. For example, when you ...
... When Mary focuses her attention on the animal by looking directly at it, a image of the animal is formed on the receptors of the retina of the eye. This defines the stimulus on the receptors stage. Transduction is the process of transformation of one form of energy to another. For example, when you ...
REVIEW GAME Final Exam PART I
... Arrange the following in the proper order in which they occur at the presynaptic side of a neuromuscular junction. 1. Calcium ions enter the pre-synaptic cell via voltage-gated calcium channels. 2. An action potential arrives at the pre-synaptic axon terminal. 3. Neurotransmitter is released into th ...
... Arrange the following in the proper order in which they occur at the presynaptic side of a neuromuscular junction. 1. Calcium ions enter the pre-synaptic cell via voltage-gated calcium channels. 2. An action potential arrives at the pre-synaptic axon terminal. 3. Neurotransmitter is released into th ...
8.2 Structure of skeletal muscle
... - Muscle cells are called fibers because they are much longer than they are wide - These cells are usually as long as the whole muscle ...
... - Muscle cells are called fibers because they are much longer than they are wide - These cells are usually as long as the whole muscle ...
ppt - Castle High School
... Steps of muscle contraction 1. Electric signal sent from brain down motor neuron to neuromuscular junction 2. Neurotransmitter signal sent from neuron received by sarcolemma of muscle cell 3. Calcium ion movement into muscle cell 4. Myosin forms cross bridges with actin 5. ATP allows cross bridges ...
... Steps of muscle contraction 1. Electric signal sent from brain down motor neuron to neuromuscular junction 2. Neurotransmitter signal sent from neuron received by sarcolemma of muscle cell 3. Calcium ion movement into muscle cell 4. Myosin forms cross bridges with actin 5. ATP allows cross bridges ...
End-plate potential
End plate potentials (EPPs) are the depolarizations of skeletal muscle fibers caused by neurotransmitters binding to the postsynaptic membrane in the neuromuscular junction. They are called ""end plates"" because the postsynaptic terminals of muscle fibers have a large, saucer-like appearance. When an action potential reaches the axon terminal of a motor neuron, vesicles carrying neurotransmitters (mostly acetylcholine) are exocytosed and the contents are released into the neuromuscular junction. These neurotransmitters bind to receptors on the postsynaptic membrane and lead to its depolarization. In the absence of an action potential, acetylcholine vesicles spontaneously leak into the neuromuscular junction and cause very small depolarizations in the postsynaptic membrane. This small response (~0.5mV) is called a miniature end plate potential (MEPP) and is generated by one acetylcholine-containing vesicle. It represents the smallest possible depolarization which can be induced in a muscle.