information from spine to upper brain Hypothalamus– involved in regulating activities internal organs‚ monitoring information from the autonomic nervous system Basic functional cell of nervous system Transmits impulses (up to 250 mph) Parts of a Neuron Dendrite – receive stimulus and carries it impulses toward the cell body Cell Body with nucleus – nucleus & most of cytoplasm Axon – fiber which carries impulses away from cell body Schwann Cells- cells which produce myelin or fat layer in the
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1. Biological Psychology 2.Neuron 3. Dendrite 4. axon 5 myelin 6 action potential 7 Threshold 8 Synapse 9 neurotransmitter 10 acetylcholine 11 Endorphins A branch of psychology concerned with the links between biology and behavior. A nerve cell; the basic building block of the nervous system. The bushy‚ branching extensions of a neuron that receive messages and conduct impulses
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Dopamine is an important neurotransmitter in the nervous system that communicates a lot of information between neurons and parts of the brain. The networks of neurons that use dopamine appear to influence activity in different areas of the brain so that abnormalities can cause abnormal activities in certain parts of the brain. Importantly for schizophrenia‚ dopamine appears to play a big
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and spinal cord. The peripheral part of the nervous system is said to be peripheral because it is outside the central nervous systems. The human nervous system contains approximately 10 billion nerve cells. These neurons are the basic building blocks of the nervous system. Neurons consist of the nerve cell body and various extensions from the cell body. These extensions‚ or processes‚ are the dendrites (branches off the cell that receive electrical impulses)‚ the axon (the electrical wiring and
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in inflamed or degenerating brain tissue. 5. Oligodendrocytes form myelin sheaths around nerve fibers in the CNS. 6. Nerve fibers with many Schwann cells forming a thick myelin sheath are called myelinated fibers‚ or gray fibers. 8. Most of the neurons in the brain and spinal cord are unipolar. 9. In a contralateral reflex arc‚ the receptors and effectors are located on opposite sides of the body. 10. In an ipsilateral arc‚ the effectors and receptors are on opposite sides of the body. 11. Groups
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sensory neurons running from stimulus receptors that inform the CNS of the stimuli and the motor neurons running from the CNS to the muscles and glands - called effectors - that take action. The PNS also consists of the Autonomic Nervous System which includes the sympathetic and parasympathetic. Also included with the PNS is the Somatic Nervous System. The body communicates internally through Neurons and Neural Pathways. Neurons consist of dendrites that receive information from the Neuron‚ Axons
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Telomerase Reactivation Reverses Tissue Degeneration in Aged Telomerase-deficient Mice Jaskelioff et al.‚ Nature‚ January 2011 This study looked at the effects of telomerase activation on the tissues of prematurely-aged adult mice. The telomerase enzyme‚ TERT-ER‚ is not expressed in the cells of these mice. The group induced (turned on) expression of TERT-ER by exposing mice to the compound 4-OHT‚ 4-hydroxytamoxifen (see definitions on next page). This treatment rebuilt the telomeres in
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Storage phase: Low-frequency (as stretch is low) afferent impulse from the stress receptor of UB Pelvic nerves (splanchnic‚ hypogastric) Spinal cord Inhibition of sacral parasympathetic Stimulation lumbar sympathetic preganglionic neurons preganglionic neurons Stimulation of Onuf’s nucleus Relaxation of detrusor & contraction relaxation of detrusor & contraction contraction of the sphincter of sphincter vesicae of sphincter vesicae urethrae Voiding phase: Distention of urinary bladder
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Roxann Milbourn Case study number 2 March 13‚ 2014 Badfish anatphys Neurotoxin 1. To present the doctor’s notes portion of the case with a description of the following terms or concepts: Diaphoresis- is the medical term for profuse sweating or perspiring. The skin’s sweat glands sweat to aid in fever management. When your body temp rises you autonomic nervous system causes you eccrine glands to secrete fluid onto the surface of the skin where it cools as it evaporates. Motor dysfunction_
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Question 1 1 out of 1 points Place these items in the correct order of what happens when a neuron is stimulated and communicates with another neuron Selected Answer 1. Positive ions flow into axon‚ creating an action potential 2. Impulse reaches threshold intensity 3. Impulse moves all the way down the axon to the terminal buttons 4. Axon releases neurotransmitters across the synapse Question 2 1 out of 1 points Samantha had a stroke. Doctors told her she sustained substantial damage to the occipital
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