describe excitation-contraction coupling. Step 1 has been numbered for you. ___1____ 1. Acetylcholine is released by the axon terminal‚ diffuses to the muscle cell and attaches To ACh receptors on the sarcolemma. ________ 2. The action potential‚ carried into the cell via the T-tubules‚ causes the SR to release Calcium ions. ________ 3. Ach-E breaks down Ach‚ which separates from its receptors. ________ 4. The muscle cell relaxes and lengthens. ________ 5. The calcium
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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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Front this divison of the peripheral nervous system includes the neurons found along the GI tract Back enteric nervous system Front name for a group of neuron cell bodies in the CNS Back nucleus Front name for a group of neuron cell bodies in the PNS Back ganglia Front these ions are cross the neuron cell membrane during a hyperpolarization Back Cl- K+ Page 1 Front Back these gates respond to chemical stimuli such as nerutransmitters
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of all the bioelectric potentials. With these bioelectric potentials they produce ionic voltages produced by the coordination of electrochemical activity within numerous cells. When the cells are in line the charges tend to migrate through the body fluids towards the still unexcited cell area. As the charge migrates it constitutes an electrical current bringing an outcome that setups the potentials between various parts of the body including the external surface. The potential differences
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Writing Assignment #2 #1- Sleep deprivation is a common problem in modern society. Sleep plays a crucial role in optimal health and wellness throughout a person’s life. Getting a proper amount of sleep can help aid in mental and physical health. Sleep deprivation can occur from various causes. Often the stresses and vigor of daily life may intrude upon our ability to sleep well. In any case‚ sleep deprivation is not only detrimental to one’s well being‚ but it can also impair cognitive ability and
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CHAPTER 3: BIOLOGICAL BASES OF BEHAVIOR 3ANEURAL COMMUNICATIONSNEUROTRANSMITTERS ORIGINS OF STUDYING THE BRAIN Plato believed the mind was located in the spherical head Aristotle believed mind was located in the heart Phrenology – Studying bumps on the head to reveal a person’s mental abilities and character traits‚ Invented by Franz Gall in 1800s PSYCHOLOGY AND BIOLOGY Everything psychological is simultaneously biological Biological Psychology – branch of psych that studies links between
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The Nervous System: Membrane Potential 1. Record the intracellular and extracellular concentrations of the following ions (mM/L): | Intracellular | Extracellular | Sodium (Na+) | 15 | 150 | Potassium (K+) | 150 | 5 | Chloride (Cl–) | 10 | 125 | 2. Excitable cells‚ like neurons‚ are more permeable to K+ than to Na+. 3. How would the following alterations affect the membrane permeability to K+? Use arrows to indicate the change in permeability. a. An increase in the number of passive
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you back to your set point. An example of this would be blood pressure or heart rate. Positive feedback loops effect the homeostatic condition by using amplification to increase the change and stimulus. For example‚ labor‚ platelate plugs‚ and action potentials are all positive feedbacks loops. 2. Describe the four physiological themes discussed in the book that apply to all living organisms. Theme 1: Structure and function are closely related: by dividing space into compartments (structure)
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The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the __contractile___ cells. The resulting mechanical events cause a heartbeat. 5. A tracing of the electrical activity of the heart is called a/an _____ECG__. 6. What do the following wave forms reflect? a. P wave _____atrial depolarization____ b. QRS complex ___ventricular depolarization_____ c. T wave ___ventricular repolarization_____ Cardiovascular System: Cardiac Action Potential
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March 26‚ 2013 Lecture -The function of the eye is to convert photons of light into action potentials (nerve impulses). -The inner layer is a nervous tunic (made out of nerve cells)=retina. -Refraction: Bends light. -The purpose of the cornea and the lens is to take an object and focus every little detail of the object on the retina on the back of the lens. Upside down and backwards. -When light goes through medias‚ it bends. -Lens are suspended by ligaments behind the pupil. Suspensory ligaments
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