As a lot of people know, it's such The Nerve (Nervous Dancing) close and tight-knit family, so I'm just happy to be back with everybody.
I hoped that I could make this work for a couple of months now and was praying and hoping that it would all align. It was the perfect time for my family. Maks [Chmerkovskiy] has other things going on and Shai is well taken care of and it was just a good time for us. Entertainment Celebrity News International. Lamar Odom. Cell body: This main part has all of the necessary components of the cell, such as the nucleus which contains DNAendoplasmic reticulum and ribosomes for building proteins and mitochondria for making energy.
If the cell body dies, the neuron dies. Cell bodies are grouped together in clusters called gangliawhich are located in various parts of the brain and spinal cord. Axons: These long, thin, cable-like projections of the cell carry electrochemical messages nerve impulses or action potentials along the length of the cell.
Depending upon the type of neuron, axons can be covered with a thin layer of myelinlike an insulated electrical wire. Myelin is made of The Nerve (Nervous Dancing)and it helps to speed transmission of a nerve impulse down a long axon.
Myelinated neurons are typically found in the peripheral nerves sensory and motor neuronswhile nonmyelinated neurons are found within the brain and spinal cord. Dendrites or nerve endings: These small, branchlike projections of the cell make connections to other cells and allow the neuron to talk with other cells or perceive the environment. Dendrites can be located on one or both ends of the cell.
Sensory neurons carry signals from the outer parts of your body periphery into the central nervous system. Motor neurons motoneurons carry signals from the central nervous system to the outer parts musclesskin, glands of your body.
Receptors sense the environment chemicals, lightsound, touch and encode this information into electrochemical messages that are transmitted by sensory neurons. Interneurons connect various neurons within the brain and spinal cord. Neural Pathways and Action Potentials. Ion Channels. The outside fluid is rich in sodium, a concentration about 10 times higher than the inside fluid The inside fluid is rich in potassium, a concentration about 20 times higher inside the cell than outside.
There are large negatively charged proteins inside the cell that are too big to move across the membrane. They give the inside of the cell a negative electrical charge compared to the outside. For comparison, the charge in your house is about V, about 1. The cell membrane is slightly "leaky" to sodium and potassium ions, so a sodium-potassium pump is located in the membrane.
This pump uses energy ATP to pump sodium ions from the inside to the outside and potassium ions from the outside to the inside. Because sodium and potassium ions are positively charged, they carry tiny electrical currents when they move across the membrane. If sufficient numbers move across the membrane, you can measure the electrical currents.
Nerve Signals. As we discussed, the inside of the cell is slightly negatively charged resting membrane potential of to mV. A disturbance mechanical, electricalor sometimes chemical causes a few sodium channels in a small portion of the membrane to open. Sodium ions enter the cell through the open sodium channels.
The positive charge that they carry makes the inside of the cell slightly less negative depolarizes the cell. When the depolarization reaches a certain threshold value, many more sodium channels in that area open. More sodium flows in and triggers an action potential. The developing positive membrane potential causes potassium channels to open. Potassium ions leave the cell through the open potassium channels. The outward movement of positive potassium ions makes the inside of the membrane more negative and returns the membrane toward the resting membrane potential repolarizes the cell.
When the membrane potential returns to the resting value, the potassium channels shut down and potassium ions can no longer leave the cell. The membrane potential slightly overshoots the resting potential, which is The Nerve (Nervous Dancing) by the sodium-potassium pump, which restores the normal ion balance across the membrane and returns the membrane potential to its resting level.
Now, this sequence of events occurs in a local area of the membrane. But these changes get passed on to the next area of membrane, then to the next area, and so on down the entire length of the axon. Thus, the action potential nerve impulse or nerve signal gets The Nerve (Nervous Dancing) propagated down the nerve cell.
The action potential is an "all-or-none" response. In other words, once the ionic events are set in motion, they will continue until the end. These ionic events occur in many excitable cells besides neurons like muscle cells. Action potentials are propagated rapidly. Typical neurons conduct at 10 to meters per second. The rapid nerve conductions throughout the neural circuitry enable you to respond to stimuli in fractions of a second. The channels can be poisoned and prevented from opening.
Various toxins puffer fish toxin, snake venom, scorpion venom can prevent specific channels from opening and distort the action potential or prevent it from happening altogether. Similarly, many local anesthetics e. The propagation of the action potential is also sensitive to temperature in experimental settings. Colder temperatures slow down the action potential, but this usually doesn't happen in an individual.
However, you can use cold-block techniques to temporarily anesthetize an area like putting ice on an injured finger. Synaptic Transmission. The presynaptic cell sending cell makes serotonin 5-hydroxytryptamine, 5HT from the amino acid tryptophan and packages it in vesicles in its end terminals.
An action potential passes down the presynaptic cell into its end terminals. Serotonin passes across the synaptic cleft, binds with special proteins called receptors on the membrane of the postsynaptic cell receiving cell and sets up a depolarization in the postsynaptic cell.
If the depolarizations reach a threshold level, a new action potential will be propagated in that cell. Some neurotransmitters cause the postsynaptic cell to hyperpolarize the membrane potential becomes more negative, which would inhibit the formation of action potentials in the postsynaptic cell.
Serotonin fits with its receptor like a lock and key. The remaining serotonin molecules in the cleft and those released by the receptors after use get destroyed by enzymes in the cleft monoamine oxidase MAOcatechol-o-methyl transferase COMT. Some get taken up by specific transporters on the presynaptic cell reuptake.
This enables the nerve signal to be turned "off" and readies the synapse to receive another action potential. There are several types of neurotransmitters besides serotonin, including acetylcholine, norepinephrine, dopamine and gamma-amino butyric acid GABA. Any given neuron produces only one type of neurotransmitter. Any one nerve cell may have synapses on it from excitatory presynaptic neurons and from inhibitory presynaptic neurons.
In this way, the nervous system can turn various cells and subsequent neural pathways "on" and "off. Sensory Neurons. Chemoreceptors sense chemicals. Wow everyone else's dances are making me feel so lame! We will also be doing the boring middle school rocking back and forth and swaying kind of thing. I'm having our DJ invite other people onto the floor shortly into our dance to prevent everyone from falling asleep. FH is so outgoing and loves dancing while I'm the total opposite.
I'm fully counting on him trying to be silly and start doing something ridiculous while I stand there awkwardly laughing lol. Jade love that! We just wanted to be a little bit different. Is there any way you'd be interested in a few lessons? Arthur Murray and such places are crazy, but we have an awesome studio that can teach everything you need in a few lessons for a really reasonable price.
Of course, more lessons also is great. Hi Date twin! Turns out that dancing in heels on carpet is a terrible idea and I rolled my ankle so bad that I'm now wearing a brace boot until it's healed.
Now I'll just be happy if I can wear my heels at the wedding! It's okay, stuff happens. It's helped me to remember to not freak out too much about anything else for the next 15 days though! You voted for. Log in Join now. Super July First Dance Nerves?
Saved Save, The Nerve (Nervous Dancing). Super September Aw, thank you, Stacy. I bet you'll look great, too. VIP June Here's a pic of us grapevining for kicks. Just try to have fun with it and enjoy! Master April It will be great--enjoy! VIP July Just enjoy it! No one will notice if you improvise for a part of it. Super October Master March Just enjoy. We've been practicing by getting drunk and dancing in our living room.
Master July Master May We did: Slow, Salsa, Hustle and back to slow. Here's us during our Salsa. ETA: picture. Master November Dedicated October Sorry; I double posted the last comment.
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