Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system‚ a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.
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of the following is NOT true regarding the EPP? A. The EPP is a graded potential needed to reach threshold B. The EPP is the direct result of voltage-gated Na+ channels opening C. The EPP occurs in the post-synaptic membrane and is not an action potential D. To generate an EPP‚ ACh acts as the neurotransmitter involved in skeletal muscle contraction E. Two of the choices above are NOT true. 2. A person is being treated at a local clinic with an acetyl cholinesterase inhibitor
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drifts across the cleft and into ACh receptors in the sarcolemma of the muscle fiber. After the sarcolemma receives the ACh‚ ion channels in the ACh receptors are opened and Sodium and Potassium both pass through them. Sodium then triggers action potential that travels across the sarcolemma and into the T Tubules. Once the AP is in the T tubules it is sensed by receptors and causes the sarcoplasmic reticulum to release Calcium into the muscle fibers cytosol. (Marieb and Hoehn‚ 2007) This Calcium
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BIOLOGY SYNOPTIC ESSAY – UNIT 5 – JUNE 13 THE MEMBRANES OF DIFFERENT TYPES OF CELLS ARE INVOLVED IN MANY DIFFERENT FUNCTIONS – 25 MARKS Membranes are found in all organisms‚ around and within cells. They control the movements in and out of cells‚ as well as protecting cells. They also allow different functions to occur. They have the same basic structure called the plasma membrane. All plasma membranes‚ around or inside cells have a same phospholipid bilayer structure. Phospholipids contribute to
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Anatomy and Physiology Unit Notes Unit 1: Organization of the Human Body Key Terms: Ana - prefix that means up or back again. Physio - a prefix that means natural or physical. Ology - a suffix that means the study of something. Homeo - a prefix that means like or similar. Thoraci -a prefix that means chest. Stasis - a suffix that means the slowing of a bodily fluid. Abdomino - a prefix that means abdomen. Anatomy-the study of structure. Physiology - the study of how a structure functions
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Tatiana Figueroa SHIVE/ENGL12/C Persuasive Essay/Draft 1 March 11‚ 2013 No Title Yet “For two years‚ I would live in fear‚ developed anxiety‚ and basically felt like a social outcast. I thought people would be afraid of me‚ and I thought having a relationship with a girl would be very hard. I didn’t want to tell anyone about my problem and I didn’t want anyone to know.” Blake was diagnosed with epilepsy. Many of you might think‚ why this happens? why people with epilepsy loose control over
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membrane of the neuron is made. The generation of an impulse is dependent on the charge difference of the inside and outside of the cell. The neuron changes to a positive charge creating a reversal of the electric potential at the cell membrane. The change is known as an action potential. It goes through the axon membrane at a speed of hundreds miles per hour‚ enabling a neuron to fire many impulses per second. The
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desflurane and sevoflurane. Commonly used intravenous anaesthetics include propofol‚ a rapid action and rapid recovery without a patient hangover. Thiopental is used in very brief procedures and has a sedative like affect. Ketamine is often used for patients in shock‚ it increases heart rate and blood pressure‚ it can lead to bad dreams and hallucinations during recovery and is also a known abused drug‚ Action Anaesthetics work on the central nervous system to promote insensitivity to the feeling
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Membrane Potentials Dr Penny Murphy Objectives The student should be able to: Describe the basic building blocks of the central nervous system. Explain what a “resting membrane potential” (RMP) is and how it is generated. Include the characteristics of the phospholipid bilayer‚ leak membrane channels and the diffusion of K+ ions‚ and the role of the Na+/K+ ATPase pump. Explain how and why increasing the permeability of the membrane to Na+ ions will affect the membrane potential. Describe
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neuron takes information away from the CNS. An interneuron transfer information between neurons in the CNS. It also sending out signal to the muscles resulting in contraction or movement. Nerves impulse occurs when an action potential changes rapidly. When action potential occurs‚ the sodium gates will open as Na+ flowing into the axon the changes from –65mV to +40mV‚ this is call depolarization and during repolarization the charge as k+exits the
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