Chapter Eleven
... • Action potentials, or nerve impulses, are: – __________________________________ carried along the length of axons ...
... • Action potentials, or nerve impulses, are: – __________________________________ carried along the length of axons ...
Bio70 Psychobiology Fall 2006 First Midterm October 12 Version A
... b. increases the release of dopamine from the presynaptic terminal. c. increases the sensitivity of dopamine receptors. d. decreases the sensitivity of dopamine receptors. 33. Cannabinoids are a class of chemicals that include: a. nicotine. b. cocaine. c. morphine. d. marijuana. 34. A certain drug u ...
... b. increases the release of dopamine from the presynaptic terminal. c. increases the sensitivity of dopamine receptors. d. decreases the sensitivity of dopamine receptors. 33. Cannabinoids are a class of chemicals that include: a. nicotine. b. cocaine. c. morphine. d. marijuana. 34. A certain drug u ...
Derived copy of How Neurons Communicate
... • Describe the basis of the resting membrane potential • Explain the stages of an action potential and how action potentials are propagated • Explain the similarities and dierences between chemical and electrical synapses • Describe long-term potentiation and long-term depression All functions perf ...
... • Describe the basis of the resting membrane potential • Explain the stages of an action potential and how action potentials are propagated • Explain the similarities and dierences between chemical and electrical synapses • Describe long-term potentiation and long-term depression All functions perf ...
The Nervous System
... • Why does Na+ diffuse in from the outside? – Higher concentration on the outside ...
... • Why does Na+ diffuse in from the outside? – Higher concentration on the outside ...
phys chapter 45 [10-24
... o Most often affects ion channel receptor types on postsynaptic terminal Neuropeptides usually cause more prolonged actions Vesicle portion of membrane invaginates back to inside of presynaptic terminal to be recycled; new vesicular membrane still contains appropriate enzyme proteins or transport pr ...
... o Most often affects ion channel receptor types on postsynaptic terminal Neuropeptides usually cause more prolonged actions Vesicle portion of membrane invaginates back to inside of presynaptic terminal to be recycled; new vesicular membrane still contains appropriate enzyme proteins or transport pr ...
File
... Calcium is the key to synaptic vesicle fusion and discharge. An action potential reaching the pre-synaptic terminal opens voltage-gated calcium channels and the resulting calcium influx triggers release. The calcium content is then restored to the resting level by rapid sequestration and removal fro ...
... Calcium is the key to synaptic vesicle fusion and discharge. An action potential reaching the pre-synaptic terminal opens voltage-gated calcium channels and the resulting calcium influx triggers release. The calcium content is then restored to the resting level by rapid sequestration and removal fro ...
Nervous System ch 11
... –Phagocytes; monitor the health of neurons •Ependymal cells –squamous or columnar –They line the central cavities of the brain and spinal column Oligodendrocytes, Schwann Cells, and Satellite Cells •Oligodendrocytes – branched cells that wrap CNS nerve fibers; produce myelin sheath •Schwann cells (n ...
... –Phagocytes; monitor the health of neurons •Ependymal cells –squamous or columnar –They line the central cavities of the brain and spinal column Oligodendrocytes, Schwann Cells, and Satellite Cells •Oligodendrocytes – branched cells that wrap CNS nerve fibers; produce myelin sheath •Schwann cells (n ...
Chapter 9: Nervous System guide—Please complete these notes on
... adjacent nerve cell membrane, which triggers another action Events leading to conduction of nerve impulse (brown box P. 213) 1. Neuron membrane maintains resting potential 2. Threshold stimulus is received ...
... adjacent nerve cell membrane, which triggers another action Events leading to conduction of nerve impulse (brown box P. 213) 1. Neuron membrane maintains resting potential 2. Threshold stimulus is received ...
Nervous System
... As Na+ goes into cell, neuron goes from being polarized to depolarized When inside becomes positive, polarization is removed and the threshold is reached K+ ions move outside, Na+ ions stay inside membrane Refractory period returns everything ...
... As Na+ goes into cell, neuron goes from being polarized to depolarized When inside becomes positive, polarization is removed and the threshold is reached K+ ions move outside, Na+ ions stay inside membrane Refractory period returns everything ...
Answers - Mosaiced.org
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
... Follows that significant –ve potential needed to balance tendency of K+ to diffuse down concentration gradient out of cell. Membrane slightly permeable to Na+, so memb potential slightly more positive than K+ eqm potential (to balance flow of Na+ into cell down conc gradient). 85. closed 86. depolar ...
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 ...
neurotransmitter
... Norepinephrine acts as a neurotransmitter and a hormone. In the peripheral nervous system, it is part of the flight-or-flight response. In the brain, it acts as a neurotransmitter regulating normal brain processes. Norepinephrine is usually excitatory, but is inhibitory in a few brain areas. ...
... Norepinephrine acts as a neurotransmitter and a hormone. In the peripheral nervous system, it is part of the flight-or-flight response. In the brain, it acts as a neurotransmitter regulating normal brain processes. Norepinephrine is usually excitatory, but is inhibitory in a few brain areas. ...
The Nervous System - Zen Shiatsu Chicago
... 2. Voltage-gated Ca2+ channels open and Ca2+ enters the axon terminal. 3. Ca2+ entry causes neurotransmitter-containing vesicles to release their contents by exocytosis. 4. Neurotransmitter diffuses across the synaptic cleft and binds to specific receptors on the postsynaptic membrane. 5. Binding of ...
... 2. Voltage-gated Ca2+ channels open and Ca2+ enters the axon terminal. 3. Ca2+ entry causes neurotransmitter-containing vesicles to release their contents by exocytosis. 4. Neurotransmitter diffuses across the synaptic cleft and binds to specific receptors on the postsynaptic membrane. 5. Binding of ...
Action potentials
... • Muscle spindles trigger reflexive muscle action when the muscle spindle is stretched • Golgi tendon organs trigger a reflex that inhibits contraction if the tendon fibers are stretched from high muscle tension • The primary motor cortex, located in the frontal lobe, is the center of conscious moto ...
... • Muscle spindles trigger reflexive muscle action when the muscle spindle is stretched • Golgi tendon organs trigger a reflex that inhibits contraction if the tendon fibers are stretched from high muscle tension • The primary motor cortex, located in the frontal lobe, is the center of conscious moto ...
Bio 17 – Nervous & Endocrine Systems
... low levels; important for sleep and low levels assoc with depression Runner’s High = DECREASED GABA ...
... low levels; important for sleep and low levels assoc with depression Runner’s High = DECREASED GABA ...
THE NERVOUS SYSTEM: Communication
... effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. Motor neurons. - Somatic Nervous System (skeletal muscles) - Autonomic Nervous System (smooth muscles, glands) C. Neurons: Nerve cells. Unique structure – cell body with many extensi ...
... effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. Motor neurons. - Somatic Nervous System (skeletal muscles) - Autonomic Nervous System (smooth muscles, glands) C. Neurons: Nerve cells. Unique structure – cell body with many extensi ...
Biological Bases of Behavior : Quiz 1
... a. releasing calcium ions into the synaptic cleft. b. releasing a third messenger substance. c. attaching to postsynaptic receptors. d. activating the re-uptake mechanism. A movement of the resting membrane potential from -70 mV to -90 mV would be termed a(n) a. depolarization. b. action potential. ...
... a. releasing calcium ions into the synaptic cleft. b. releasing a third messenger substance. c. attaching to postsynaptic receptors. d. activating the re-uptake mechanism. A movement of the resting membrane potential from -70 mV to -90 mV would be termed a(n) a. depolarization. b. action potential. ...
Nervous System
... Depolarization – the inside of the membrane becomes less negative Repolarization – the membrane returns to its resting membrane potential Hyperpolarization – the inside of the membrane becomes more negative than the resting potential ...
... Depolarization – the inside of the membrane becomes less negative Repolarization – the membrane returns to its resting membrane potential Hyperpolarization – the inside of the membrane becomes more negative than the resting potential ...
File
... their conc. gradients to ‘reset’ neuron for another action potential (ie. re-creates steep gradients mentioned earlier); 3. Protein Gates (Diffusion): specific, one-way proteins (gates) – two types: Na+ gates (open to allow Na+ into axon (down its conc. gradient)), K+ gates (open to allow K+ out of ...
... their conc. gradients to ‘reset’ neuron for another action potential (ie. re-creates steep gradients mentioned earlier); 3. Protein Gates (Diffusion): specific, one-way proteins (gates) – two types: Na+ gates (open to allow Na+ into axon (down its conc. gradient)), K+ gates (open to allow K+ out of ...
Paper I
... 6. How does myelin increase the velocity of the action potential? In addition to myelin, name another structure in the nervous system which helps in rapid propagation of the action potential. Briefly describe the mechanism of these structures for fast movement of the action potential. ...
... 6. How does myelin increase the velocity of the action potential? In addition to myelin, name another structure in the nervous system which helps in rapid propagation of the action potential. Briefly describe the mechanism of these structures for fast movement of the action potential. ...
Midterm Review Answers
... 1) A neuron receives a stimulus that, by itself, can bring the neuron to threshold, but no action potential is produced. Explain what could cause this. Neurons receive input from many neurons at the same time. If the neuron is receiving many inhibitory signals from other neurons, a single excitatory ...
... 1) A neuron receives a stimulus that, by itself, can bring the neuron to threshold, but no action potential is produced. Explain what could cause this. Neurons receive input from many neurons at the same time. If the neuron is receiving many inhibitory signals from other neurons, a single excitatory ...
Chapter 11: Fundamentals of the Nervous System and Nervous Tissue
... opposed to an electrical one) d. Ensures unidirectional communication between neurons 3. Synaptic Cleft: Information Transfer a. Nerve impulses reach the axonal terminal of the presynaptic neuron and open Ca2+ channels b. Neurotransmitter is released into the synaptic cleft via exocytosis in respons ...
... opposed to an electrical one) d. Ensures unidirectional communication between neurons 3. Synaptic Cleft: Information Transfer a. Nerve impulses reach the axonal terminal of the presynaptic neuron and open Ca2+ channels b. Neurotransmitter is released into the synaptic cleft via exocytosis in respons ...
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.