Exercise 17
... Nissl bodies: elaborate type of rough ER; involved in the metabolic activity of the the cell Dendrites: are receptive regions that bear receptors for neurotransmitters released by other neurons Axons: are nerve impulse generators and transmitters Collaterals: branches of axons from neurons Axon Hill ...
... Nissl bodies: elaborate type of rough ER; involved in the metabolic activity of the the cell Dendrites: are receptive regions that bear receptors for neurotransmitters released by other neurons Axons: are nerve impulse generators and transmitters Collaterals: branches of axons from neurons Axon Hill ...
The Nervous System
... • What are the 2 motor divisions? • What is the difference between the sympathetic and parasympathetic nervous systems? ...
... • What are the 2 motor divisions? • What is the difference between the sympathetic and parasympathetic nervous systems? ...
Chapter 12 - FacultyWeb Support Center
... 6. The synaptic knobs of axons contain sacs called ______________ vesicles. 7. Synaptic ______________ contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, ________ ion diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of ...
... 6. The synaptic knobs of axons contain sacs called ______________ vesicles. 7. Synaptic ______________ contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, ________ ion diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of ...
Drug and Alcohol Abuse
... myelin (sends signal faster) • Branches out into several “axon terminals” • Can talk to many cells at once ...
... myelin (sends signal faster) • Branches out into several “axon terminals” • Can talk to many cells at once ...
Nervous System - Buck Mountain Central School
... • Dominos falling, one after another. • When axons are myelinated, nerve impulses travel by salutatory conduction. Action potential jump from node to node. ...
... • Dominos falling, one after another. • When axons are myelinated, nerve impulses travel by salutatory conduction. Action potential jump from node to node. ...
sensory1
... modality, intensity, location, and duration of external stimuli. • Transduction: the conversion of a physical stimulus into a change in membrane potential (electrochemical signal) – Signals are transmitted in the form of graded potentials, action potentials, and synaptic interaction • Receptors: cel ...
... modality, intensity, location, and duration of external stimuli. • Transduction: the conversion of a physical stimulus into a change in membrane potential (electrochemical signal) – Signals are transmitted in the form of graded potentials, action potentials, and synaptic interaction • Receptors: cel ...
Biology 12 Name: Nervous System Practice Exam Types of Neurons
... 23. Draw and identify the major components of a Synapse including pre-synaptic membrane, vesicle with EXCITATORY neurotransmitter, synapse, re-uptake transporters, receptor sites and post synaptic membrane. (THIS IS A GOOD CHOICE FOR SHORTANSWER) ...
... 23. Draw and identify the major components of a Synapse including pre-synaptic membrane, vesicle with EXCITATORY neurotransmitter, synapse, re-uptake transporters, receptor sites and post synaptic membrane. (THIS IS A GOOD CHOICE FOR SHORTANSWER) ...
Document
... gap between parts of 2 cells at a synapse. Synapses can occur between 2 neurons, a receptor cell & a neuron, or a neuron & an effector. presynaptic neuron – brings the impulse to the synapse which stimulates or inhibits the postsynaptic neuron (or a muscle or gland) The process by which the impulse ...
... gap between parts of 2 cells at a synapse. Synapses can occur between 2 neurons, a receptor cell & a neuron, or a neuron & an effector. presynaptic neuron – brings the impulse to the synapse which stimulates or inhibits the postsynaptic neuron (or a muscle or gland) The process by which the impulse ...
Answer Key
... Students should explain the neural transmission process using the terms in context: Signals are received by the neuron's dendrites or cell body. An action potential is transmitted down the axon, stimulating the terminal branches of the axon to release neurotransmitters into the synapse, which bind w ...
... Students should explain the neural transmission process using the terms in context: Signals are received by the neuron's dendrites or cell body. An action potential is transmitted down the axon, stimulating the terminal branches of the axon to release neurotransmitters into the synapse, which bind w ...
Nervous System
... Most stimuli are received by receptors located on the membrane of nerve cells. ...
... Most stimuli are received by receptors located on the membrane of nerve cells. ...
Neurotransmission Notes
... The unequal distribution of charged particles creates a voltage (known as the resting potential) inside the axon of -70 mV. Transmission: When a dendrite is stimulated: 1. positive ions rush in. If enough rush in (ie, if it reaches threshold), channels at the base of the axon open, allowing even mor ...
... The unequal distribution of charged particles creates a voltage (known as the resting potential) inside the axon of -70 mV. Transmission: When a dendrite is stimulated: 1. positive ions rush in. If enough rush in (ie, if it reaches threshold), channels at the base of the axon open, allowing even mor ...
Neurones & the Action Potential
... Between the sheaths are the Nodes of Ranvier, where sodium channels are concentrated. Action potentials jump from one to the next. This is called SALTATORY CONDUCTION ...
... Between the sheaths are the Nodes of Ranvier, where sodium channels are concentrated. Action potentials jump from one to the next. This is called SALTATORY CONDUCTION ...
An Herbalist`s View of the Nervous System
... Anxiolytic – reduces anxiety or nervousness Calmative – promotes a feeling of calm, relaxation Excitant – agent eliciting excitation of specific body functions, i.e. Cerebral or motor Hypnotic – induces sleep Narcotic – producing sleep or stupor, or an opium derived drug Nervine – nourishes and trea ...
... Anxiolytic – reduces anxiety or nervousness Calmative – promotes a feeling of calm, relaxation Excitant – agent eliciting excitation of specific body functions, i.e. Cerebral or motor Hypnotic – induces sleep Narcotic – producing sleep or stupor, or an opium derived drug Nervine – nourishes and trea ...
1. A unicellular protest may use a contractile vacuole to expel
... 37. What is the role of ATP in muscle contraction? a. To form cross-‐bridges between thick and thin filaments. b. To release myosin head from actin when it binds to myosin and to provide energy when ...
... 37. What is the role of ATP in muscle contraction? a. To form cross-‐bridges between thick and thin filaments. b. To release myosin head from actin when it binds to myosin and to provide energy when ...
PNS Terminology
... • involuntary motor commands and sensory information • supplies cardiac and smooth muscle, glands (i.e. viscera) • comprised on two neurons – preganglionic and postganglionic – preganglionic synapses with the cell body of the postganglionic within the ganglion – the pregang and postgang neurotransmi ...
... • involuntary motor commands and sensory information • supplies cardiac and smooth muscle, glands (i.e. viscera) • comprised on two neurons – preganglionic and postganglionic – preganglionic synapses with the cell body of the postganglionic within the ganglion – the pregang and postgang neurotransmi ...
SENSORY PHYSIOLOGY
... different types of receptors for different types of touch sensation: • free nerve endings • Meissner's corpuscle • Pacinian corpuscle • Ruffini's corpuscle • Merkel receptors – ...
... different types of receptors for different types of touch sensation: • free nerve endings • Meissner's corpuscle • Pacinian corpuscle • Ruffini's corpuscle • Merkel receptors – ...
The Muscular System
... long period of time, muscle will atrophy (shrink down) • Neuromuscular junctions- sites where the ends of motor nerve fibers connect to muscle fibers. Space is actually a synaptic space. ...
... long period of time, muscle will atrophy (shrink down) • Neuromuscular junctions- sites where the ends of motor nerve fibers connect to muscle fibers. Space is actually a synaptic space. ...
Neurotoxicity
... General protein synthesis impairment may have an effect not only on the neurotransmitters production, but also the production of important enzymes which break down neurotransmitters when they are no longer needed. ...
... General protein synthesis impairment may have an effect not only on the neurotransmitters production, but also the production of important enzymes which break down neurotransmitters when they are no longer needed. ...
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.