Neurons
... a neural impulse; a brief electrical charge that travels down an axon 400 ft./sec ...
... a neural impulse; a brief electrical charge that travels down an axon 400 ft./sec ...
1. The diagram below is of a nerve cell or neuron. i. Add the following
... Axon; Myelin sheath; Cell body; Dendrites; Muscle fibres; ii. Now indicate the direction that the nerve impulse travels. 2. There are three different kinds of neuron or nerve ...
... Axon; Myelin sheath; Cell body; Dendrites; Muscle fibres; ii. Now indicate the direction that the nerve impulse travels. 2. There are three different kinds of neuron or nerve ...
Transmission at the Synapse and the
... INCREASED calcium release into the cell (thus increased release of neurotransmitter) o for example: SEROTONIN acts a presynaptic facilitator; it increases cAMP activity, which results in phosphorylation of potassium channels (which become closed in the phosphorylated state). The result is delayed re ...
... INCREASED calcium release into the cell (thus increased release of neurotransmitter) o for example: SEROTONIN acts a presynaptic facilitator; it increases cAMP activity, which results in phosphorylation of potassium channels (which become closed in the phosphorylated state). The result is delayed re ...
Nervous System I
... Central Nervous System and Peripheral Nervous System. Central Nervous System (CNS) composed of the brain and spinal cord Peripheral nervous system (PNS) composed of the nervous (cranial and spinal) that connects the CNS to other body parts. Together these systems provide three general functio ...
... Central Nervous System and Peripheral Nervous System. Central Nervous System (CNS) composed of the brain and spinal cord Peripheral nervous system (PNS) composed of the nervous (cranial and spinal) that connects the CNS to other body parts. Together these systems provide three general functio ...
resting membrane potential
... Determining the Equilibrium Potentials for Potassium and Sodium Ions The resting membrane potential depends on two critical factors: the concentration gradients of ion (particularly sodium ions and potassium ions) across the plasma membrane the presence of ion channels in the plasma membrane ...
... Determining the Equilibrium Potentials for Potassium and Sodium Ions The resting membrane potential depends on two critical factors: the concentration gradients of ion (particularly sodium ions and potassium ions) across the plasma membrane the presence of ion channels in the plasma membrane ...
9.2 Electrochemical Impulses
... 2. Na+ moves into cell following a concentration gradient (diffusion) and also an electrical potential gradient. The positive charge moving into the neuron reduces the potential difference of the membrane . This is ...
... 2. Na+ moves into cell following a concentration gradient (diffusion) and also an electrical potential gradient. The positive charge moving into the neuron reduces the potential difference of the membrane . This is ...
Ch. 19 Sec. 1 Notes
... *The axon carries impulses away from the cell body -Nerve impulses begin in a dendrite, move toward the cell body, and then move down the axon *A neuron can have many dendrites, but only one axon *Axons and dendrites can be called nerve fibers ...
... *The axon carries impulses away from the cell body -Nerve impulses begin in a dendrite, move toward the cell body, and then move down the axon *A neuron can have many dendrites, but only one axon *Axons and dendrites can be called nerve fibers ...
Nervous System
... Nervous System function: The nervous system is composed of neurons and neuroglia. ____________ _____________ at the ends of peripheral nerves gather information and convert it into nerve impulses. When sensory impulses are integrated in the brain as ______________, this is the integrative function o ...
... Nervous System function: The nervous system is composed of neurons and neuroglia. ____________ _____________ at the ends of peripheral nerves gather information and convert it into nerve impulses. When sensory impulses are integrated in the brain as ______________, this is the integrative function o ...
Physiology 1B
... The point of contact at which impulses are passed from one cell to another are known as Synapse ...
... The point of contact at which impulses are passed from one cell to another are known as Synapse ...
9.3 Synaptic Transmission
... When the nerve impulse reaches the end of the axon of the presynaptic neuron it causes synaptic vesicles to move to the presynaptic ...
... When the nerve impulse reaches the end of the axon of the presynaptic neuron it causes synaptic vesicles to move to the presynaptic ...
Chapter 48 Learning Objectives: Nervous Systems - STHS-AP-Bio
... 2. Name the three stages in the processing of information by nervous systems. 3. Distinguish among sensory neurons, interneurons, and motor neurons. 4. List and describe the major parts of a neuron and explain the function of each. 5. Describe the function of astrocytes, radial glia, oligodendrocyte ...
... 2. Name the three stages in the processing of information by nervous systems. 3. Distinguish among sensory neurons, interneurons, and motor neurons. 4. List and describe the major parts of a neuron and explain the function of each. 5. Describe the function of astrocytes, radial glia, oligodendrocyte ...
Neuroscience01_Introduction
... Ipsilateral means on the same side with reference to a speciifc ...
... Ipsilateral means on the same side with reference to a speciifc ...
Notes - The Nervous System
... electrical impulses. – At the end of the axon it is changed into a chemical message so it can cross over the synapse – ...
... electrical impulses. – At the end of the axon it is changed into a chemical message so it can cross over the synapse – ...
Biological Membranes Transport
... Experimental Figure 22.2 Recording of an axonal membrane potential over time reveals the amplitude and frequency of action potentials. ...
... Experimental Figure 22.2 Recording of an axonal membrane potential over time reveals the amplitude and frequency of action potentials. ...
Brief Review of Membrane Structure and Osmosis Cells and cell
... Substances that cross the membrane through specific channels In contrast, ions such Na+ or Cl- are unable to cross the membrane freely. Special channels are required for these substances to cross the cell membrane. These channels are proteins imbedded in the membrane. When ions are passing through ...
... Substances that cross the membrane through specific channels In contrast, ions such Na+ or Cl- are unable to cross the membrane freely. Special channels are required for these substances to cross the cell membrane. These channels are proteins imbedded in the membrane. When ions are passing through ...
Mouse anti-receptor protein tyrosine phosphatase sigma, RPTPσ
... proteins that are involved in axon growth and guidance during neural development. Members of this subfamily, RPTPσ, RPTPδ and LAR contain two cytoplasmic phosphatase domains and extracellular immunoglobulin domains followed by fibronectin type III repeats. RPTPσ is a type I transmembrane protein tha ...
... proteins that are involved in axon growth and guidance during neural development. Members of this subfamily, RPTPσ, RPTPδ and LAR contain two cytoplasmic phosphatase domains and extracellular immunoglobulin domains followed by fibronectin type III repeats. RPTPσ is a type I transmembrane protein tha ...
FIGURE LEGENDS FIGURE 19.1 Evidence of synapse elimination
... innervated neuromuscular junctions are on twitch muscle fibers that have voltage-sensitive sodium channels. The multiply innervated neuromuscular junctions are found on tonic muscle fibers that do not have regenerative potentials. Labeling of different axons with different colors was accomplished by ...
... innervated neuromuscular junctions are on twitch muscle fibers that have voltage-sensitive sodium channels. The multiply innervated neuromuscular junctions are found on tonic muscle fibers that do not have regenerative potentials. Labeling of different axons with different colors was accomplished by ...
Active Transport, Endocytosis, and Exocytosis
... ATP is chemical energy made in a cell’s mitochondria. Besides in neurons, like we have already seen, ATP is needed to drive many other processes – including the making of ATP. ATP is used in the mitochondrial proton pump, moving hydrogen ions (H+) across the inner mitochondrial membrane. This proton ...
... ATP is chemical energy made in a cell’s mitochondria. Besides in neurons, like we have already seen, ATP is needed to drive many other processes – including the making of ATP. ATP is used in the mitochondrial proton pump, moving hydrogen ions (H+) across the inner mitochondrial membrane. This proton ...
Motor neuron
... chemical messengers that traverse the synaptic gaps between neurons (leave the axon) when released, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron (dendrite part) This produces a graded potential in the receiving neuron! ...
... chemical messengers that traverse the synaptic gaps between neurons (leave the axon) when released, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron (dendrite part) This produces a graded potential in the receiving neuron! ...
Neurons
... 3 The Schwann cell cytoplasm is forced from between the membranes. The tight membrane wrappings surrounding the axon form the myelin sheath. ...
... 3 The Schwann cell cytoplasm is forced from between the membranes. The tight membrane wrappings surrounding the axon form the myelin sheath. ...
CNS And Anesthesia
... acetylcholine is transmitter between pre and postganlionic neurons; norepinephrine is neurotransmitter between the neuron and effector cell sympathetic stimulation produces more generalized effects than parasympathetic stimulation adrenal medulla is essentially a specialized sympathetic ganglia, whi ...
... acetylcholine is transmitter between pre and postganlionic neurons; norepinephrine is neurotransmitter between the neuron and effector cell sympathetic stimulation produces more generalized effects than parasympathetic stimulation adrenal medulla is essentially a specialized sympathetic ganglia, whi ...
REVIEW THE NERVOUS SYSTEM
... 33. A major subdivision of the nervous system that serves as the communication lines, linking all parts of the body to the CNS.__________________________________ nervous system. 34. The ________________________________________ nervous system does not come in contact with the environment. 35. The aut ...
... 33. A major subdivision of the nervous system that serves as the communication lines, linking all parts of the body to the CNS.__________________________________ nervous system. 34. The ________________________________________ nervous system does not come in contact with the environment. 35. The aut ...
Chapter 8 Nervous System
... 1. Astrocytes – major support of the CNS – common site of CNS tumors – look like a star with some of their processes reaching out and wrapping around capillaries (create the blood brain barrier using tight junctions) 2. Ependymal – line the fluid filled cavities of the CNS – produce and move the cer ...
... 1. Astrocytes – major support of the CNS – common site of CNS tumors – look like a star with some of their processes reaching out and wrapping around capillaries (create the blood brain barrier using tight junctions) 2. Ependymal – line the fluid filled cavities of the CNS – produce and move the cer ...
Chapter 9
... Stimulation of a membrane can locally affect its__________________. When the membrane potential becomes_____________, the membrane is depolarized. If sufficiently strong depolarization occurs, a threshold potential is ...
... Stimulation of a membrane can locally affect its__________________. When the membrane potential becomes_____________, the membrane is depolarized. If sufficiently strong depolarization occurs, a threshold potential is ...
The Nervous System - riverridge210.org
... negatively charged ions on each side of the cell. The potential is 70 millivolts. 3. Myelin improves the rate of impulses along an axon. Myelin is composed of 80 percent lipid and 20 percent protein forms an insulated sheath around the axon. ...
... negatively charged ions on each side of the cell. The potential is 70 millivolts. 3. Myelin improves the rate of impulses along an axon. Myelin is composed of 80 percent lipid and 20 percent protein forms an insulated sheath around the axon. ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.