Reflex Arc - TangHua2012-2013
... Neurotransmitter’s job is to increase the ______________________________________ on the postsynaptic membrane. The Neurotransmitter binds to ____________________________ on the dendrite of the next neuron. If enough transmitter substance is received, the _____________________ and continue the impuls ...
... Neurotransmitter’s job is to increase the ______________________________________ on the postsynaptic membrane. The Neurotransmitter binds to ____________________________ on the dendrite of the next neuron. If enough transmitter substance is received, the _____________________ and continue the impuls ...
36.1: The Nervous System
... • 1. Sensory neurons: carry impulses from the body to the spinal cord and brain (sense receptors) • 2. Motor neurons carry the response impulses away from the brain and spinal cord to a muscle ...
... • 1. Sensory neurons: carry impulses from the body to the spinal cord and brain (sense receptors) • 2. Motor neurons carry the response impulses away from the brain and spinal cord to a muscle ...
The somatic sensory system
... Tonic receptors – slowly adapting – they fire rapidly when first activated, than they slow and maintain firing as long as the stimulus is present (baroreceptors, proprioceptors) ...
... Tonic receptors – slowly adapting – they fire rapidly when first activated, than they slow and maintain firing as long as the stimulus is present (baroreceptors, proprioceptors) ...
Laminar analysis of excitatory local circuits in vibrissal motor
... to the thickness of the cortex, suggesting that strong circuits were readily detected. LSPS measurements are perturbed by strong direct responses from dendrites of the recorded neurons, causing an underestimate of local, mainly intralaminar connections relative to pair recordings. For example, our m ...
... to the thickness of the cortex, suggesting that strong circuits were readily detected. LSPS measurements are perturbed by strong direct responses from dendrites of the recorded neurons, causing an underestimate of local, mainly intralaminar connections relative to pair recordings. For example, our m ...
of the smooth muscles
... and by the fact that it shows continuous, irregular contractions that are independent of its nerve supply. This maintained state of partial contraction is called tonus or tone. There is no true "resting" value for the membrane potential, but it averages about -50 mV, when the muscle active it become ...
... and by the fact that it shows continuous, irregular contractions that are independent of its nerve supply. This maintained state of partial contraction is called tonus or tone. There is no true "resting" value for the membrane potential, but it averages about -50 mV, when the muscle active it become ...
Neurotransmitters
... Figure 11.17 Chemical synapses transmit signals from one neuron to another using neurotransmitters. ...
... Figure 11.17 Chemical synapses transmit signals from one neuron to another using neurotransmitters. ...
The NERVOUS SYSTEM
... •Every thought, action and emotion reflects its activity. •It signals the body through electrical impulses that communicate with the body cells. •Its signaling and responding abilities are highly specific and rapid. The Nervous System is capable of: 1. Sensory input – gathering information To moni ...
... •Every thought, action and emotion reflects its activity. •It signals the body through electrical impulses that communicate with the body cells. •Its signaling and responding abilities are highly specific and rapid. The Nervous System is capable of: 1. Sensory input – gathering information To moni ...
Document
... • To compare and contrast sensory, motor, and interneurons and explain a general pathway. • To determine the functions of the 5 types of ...
... • To compare and contrast sensory, motor, and interneurons and explain a general pathway. • To determine the functions of the 5 types of ...
Nature Versus Nurture
... • Site of communication between neurons • Site of neurotransmitter (NTX) release (chemicals which transmit signals from neuron to neuron or another cell) ...
... • Site of communication between neurons • Site of neurotransmitter (NTX) release (chemicals which transmit signals from neuron to neuron or another cell) ...
Unit 2 Multiple Choice test Name
... D) sympathetic; parasympathetic E) parasympathetic; sympathetic 16. Motor neurons are to the ________ nervous system as interneurons are to the ________ nervous system. A) sympathetic; parasympathetic B) central; peripheral C) autonomic; somatic D) parasympathetic; sympathetic E) peripheral; central ...
... D) sympathetic; parasympathetic E) parasympathetic; sympathetic 16. Motor neurons are to the ________ nervous system as interneurons are to the ________ nervous system. A) sympathetic; parasympathetic B) central; peripheral C) autonomic; somatic D) parasympathetic; sympathetic E) peripheral; central ...
The Autonomic Nervous System
... these neurons release acetylcholine. They include: i. all symp. & parasym. Preganglionic neurons ii. symp. Postganglionic neuron innervates sweat gland. iii. All parasym. Postganglionic neurons --there are two types of cholinergic receptors, both of which bind Ach. They are : -Nicotinic—at motor ...
... these neurons release acetylcholine. They include: i. all symp. & parasym. Preganglionic neurons ii. symp. Postganglionic neuron innervates sweat gland. iii. All parasym. Postganglionic neurons --there are two types of cholinergic receptors, both of which bind Ach. They are : -Nicotinic—at motor ...
The Nervous System
... ensues, depolarizing the cell and causing the VM to increase. This is the rising phase of an AP. • Eventually, the Na+ channel will have inactivated and the K+ channels will be open. Now, K+ effluxes and repolarization occurs. This is the falling phase. – K+ channels are slow to open and slow to clo ...
... ensues, depolarizing the cell and causing the VM to increase. This is the rising phase of an AP. • Eventually, the Na+ channel will have inactivated and the K+ channels will be open. Now, K+ effluxes and repolarization occurs. This is the falling phase. – K+ channels are slow to open and slow to clo ...
AUTONOMIC NERVOUS SYSTEM REVIEW QUESTIONS:
... Muscarinic cholinergic receptors – 2nd messenger system, either excitatory or inhibitory responses. ...
... Muscarinic cholinergic receptors – 2nd messenger system, either excitatory or inhibitory responses. ...
Shier, Butler, and Lewis: Hole`s Human Anatomy and Physiology
... 6. The synaptic knobs of axons contain sacs called synaptic vesicles. 7. Synaptic vesicles contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, calcium diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of events that caus ...
... 6. The synaptic knobs of axons contain sacs called synaptic vesicles. 7. Synaptic vesicles contain neurotransmitters. 8. When a nerve impulse reaches a synaptic knob, calcium diffuses inward from the extracellular fluid. 9. The calcium inside the synaptic knob initiates a series of events that caus ...
Document
... Merton, Morton) postulated that movements occur by setting spindles through gamma motorneurons and then the feedback loops causing appropriate alpha motorneuron firing. Physiological evidence for this came from experiments on decerebrate cats in which turning their head, caused leg muscle contractio ...
... Merton, Morton) postulated that movements occur by setting spindles through gamma motorneurons and then the feedback loops causing appropriate alpha motorneuron firing. Physiological evidence for this came from experiments on decerebrate cats in which turning their head, caused leg muscle contractio ...
Sensors - Castle High School
... Cortical neurons are stimulated by bars of light in a particular orientation, corresponding to rows of circular receptive fields of ganglion cells. The brain assembles a mental image of the world by analyzing the edges in patterns of light and ...
... Cortical neurons are stimulated by bars of light in a particular orientation, corresponding to rows of circular receptive fields of ganglion cells. The brain assembles a mental image of the world by analyzing the edges in patterns of light and ...
The Nervous System
... 3. PNS is composed of nerves derived from the brain and spinal cord (12 pairs of cranial nerves and 31 pairs of spinal nerves), which serve as linkage between the CNS and the body. 4. PNS can be subdivided into Sensory (afferent) nerves and Motor (efferent) nerves. Sensory nerves send nerve impulse ...
... 3. PNS is composed of nerves derived from the brain and spinal cord (12 pairs of cranial nerves and 31 pairs of spinal nerves), which serve as linkage between the CNS and the body. 4. PNS can be subdivided into Sensory (afferent) nerves and Motor (efferent) nerves. Sensory nerves send nerve impulse ...
Autonomic nervous system
... 2- Motor (Efferent) neuron: A neuron located within the CNS that controls the contraction of a muscle or the secretion of a gland. They usually have short dendrites and long axons. 2- Interneuron or association neurons: A neuron located entirely within the CNS in which they form the connecting link ...
... 2- Motor (Efferent) neuron: A neuron located within the CNS that controls the contraction of a muscle or the secretion of a gland. They usually have short dendrites and long axons. 2- Interneuron or association neurons: A neuron located entirely within the CNS in which they form the connecting link ...
Nervous System: Levels of Organization Review and
... membrane and how it is measured. Contrast the relative concentrations of ions in body solutions inside and outside of a cell (sodium, potassium, calcium and chloride ions). Explain how four factors determine a neuron’s resting membrane potential. Explain how a local electrical response in a neuron m ...
... membrane and how it is measured. Contrast the relative concentrations of ions in body solutions inside and outside of a cell (sodium, potassium, calcium and chloride ions). Explain how four factors determine a neuron’s resting membrane potential. Explain how a local electrical response in a neuron m ...
Nervous Tissue - Northland Community & Technical College
... current spreads to next cell through gap junctions faster, two-way transmission & capable of synchronizing groups of neurons chemical one-way ...
... current spreads to next cell through gap junctions faster, two-way transmission & capable of synchronizing groups of neurons chemical one-way ...
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.