neurotransmitters‚ such as the dopamine‚ acetylcholine‚ gaba and glutamate. Plus‚ I will analyze their function‚ and evaluate their impact on physical and mental behavior. Neurotransmitters are stored in minute sac called vesicles located at the end of axons. When an impulse‚ reaches the
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and support for the nerve cells. Glial cells that are mentioned in this and the following two lectures include: Oligodendrocytes‚ which create the myelin sheaths (electrical insulation) around axons in the central nervous system. Neurolemmocytes (Schwann cells)‚ which create the myelin sheaths around axons in the peripheral nervous system. Astrocytes‚ which control the extracellular environment of nerve cells‚ for example by removing “used” neurotransmitter molecules. The nerve cell membrane
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the protons are not equal to the electrons ion the protons are not equal to the neutrons isotope atomic mass = mass of protons + neutrons changing the number of neutrons does not influece the mass or electrons atom behaviour is because of electrons hydrogen almost always loses its electron‚ leaving it a hydrogen ion taking away a negative charge creates a cation adding a negative charge creates an anion electronegativity is the ability to steal electrons electronegativity is influenced
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visceral motor system. 2. Preganglionic Neuron – First neuron that resides in the brain or spinal cord. 3. Preganglionic Axon – Synapses with the second motor neuron; thin‚ lightly myelinated. 4. Postganglionic Neuron – Second motor neuron. 5. Autonomic Ganglion – Cell body of the postganglionic neuron is located here outside the CNS. 6. Postganglionic Axon – Extends to the effector organ; nonmyelinated. 7. Acetylcholine (ACh) – All somatic motor neurons release this at their
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Study Guide for Quiz 1 What is gastrulation? What layers are formed during this process? The process in which a gastrula develops from a blastula by the inward migration of cells. Goes from one layer to three. Endoderm Mesoderm Ectoderm What is a chimera? a single organism that is composed of two or more different populations of genetically distinct cells that originate from different zygotes involved in sexual reproduction Understand the types of injuries/assaults an early embryo can
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to another cell and is the basic unit in the nervous system. The cell body of the neuron is what contains the nucleus and the other organelles. The nucleus is where the DNA is stored. Dendrites extend from the cell‚ as do axons. Dendrites receive any incoming input while axons release signals out of the neuron. 2. Explain the interaction between the central nervous system and peripheral nervous system. The central nervous system includes the brain and the spinal cord and carries information throughout
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The Neuromuscular Junction by: Dominique Latham 651 words A neuromuscular junction is a place in the body where the axons of motor nerves meet the muscle‚ thus transmitting messages from the brain which cause the muscle to contract and relax. Every organism has thousands of neuromuscular joints which are the locations and means by which the motor neuron of the nervous system that instructs the muscle cells of the muscular systems to take action. Action that ‚ in turn lead to movements of muscles
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Structure of Main Body Systems How The Human Body Works The Su Yi Win Health & Social Care (Foundation) Victoria University College Main Body Systems • A human body system consists of specific cells‚ tissues and organs that work together to perform specific functions. These systems work together to maintain your overall health. Some of the body systems are as below : Cardiovascular System • Consists of the Heart‚ Blood Vessels (Veins‚ Arteries‚ Capillaries) and Blood. Its main function is to
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Cells are the structural and functional units of all living organisms; each specialised to perform dedicated duties throughout their life span. All living organisms can be sorted into one of two groups depending on the fundamental structure of their cells. These two groups are the prokaryotes and the eukaryotes. A Prokaryote cell is the first form of cells for many millions of years until the eukaryote cell evolved from the prokaryote cell‚ which created life. Prokaryote cells are organisms made
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nerves. * White matter is one of the two components of the central nervous system‚ and it consists of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another as well as in between the cerebrum and lower brain centers. Grey matter contains neural cell bodies. Unlike white matter‚ it is mostly made up of myelinated axon tracts. Tracts are bundles of fibers that connect to different parts of the CNS. Roots receive information sent by neurons. Spinal nerves
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