shrimp-like in that it is elongate and nearly cylindrical in cross section. The abdomen is well developed and its segmentation is easily noted. The crayfish has bilateral symmetry‚ anterior‚ posterior‚ dorsal‚ ventral‚ right‚ and left. Nervous System The crayfish nervous system
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When substances like acetylcholine and norepinephrine are released in the body‚ they tend to bind to receptors‚ tissues and neurons. These neurotransmitters transfer signals throughout the nervous system and stimulates action potentials in the postganglionic neurons. Receptors found on the ANS and PNS includes the cholinergic receptors‚ which consists of all sympathetic and parasympathetic preganglionic‚ sympathetic postganglionic and all parasympathetic postganglionic neurons. The cholinergic receptors
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When you are diagnosed with a brain tumor‚ it is a scary life-changing event. The brain is one of the most important vital organs‚ and if found with a brain tumor‚ go to the doctor for immediate help. The brain and spine make up the central nervous system or CNS. Where each vital function is controlled. So if you have a tumor in your CNS‚ it can effect everything you do like: your thought process‚ how you talk‚ and even how you can walk. There are two types of brain tumors‚ primary and secondary
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NATIONAL CENTER FOR CASE STUDY TEACHING IN SC CE Wearing on Her Nerves: Exploring the Interrelation between the Nervous and Muscular Systems by Kathleen G. Brown‚ Nursing Department Sharon S. Ellerton‚ Biological Sciences and Geology Queensborough Community College‚ City University of New York Part I – Rise and Shine? Kathy‚ a 20-year-old woman‚ awakens one morning to a tingling‚ numb sensation covering both of her feet. This has happened to her a number of times throughout the year
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Human Sensory Systems Objectives · Describe how sensory receptors communicate to the central nervous system. · Describe receptors that detect temperature‚ pain‚ touch and pressure‚ muscle length and tension‚ and blood pressure. · Describe the nature of vision in terms of its stimulus on the function of rod and cone cells. Introduction The function of the brain is to convey messages to different parts of the body. Messages are conveyed from a nerve cell to another nerve cell‚ muscle cell
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Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Depolarization has to do with surfaces becoming more negative or positive and reaches a certain point called a threshold. When the threshold is reached‚ an action potential is initiated. 2. What was the threshold voltage in Activity 1? The threshold voltage in Activity 1 was 3.0. 3. What was the effect of increasing the voltage? How does this change correlate to changes
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R E V I E W NAME ____________________________________ LAB TIME/DATE _______________________ S H E E T EXERCISE 21 Print Form Spinal Cord‚ Spinal Nerves‚ and the Autonomic Nervous System Anatomy of the Spinal Cord 1. Match each anatomical term in the key to the descriptions given below. Key: a. D C B A cauda equina 1. 2. 3. 4. b. conus medullaris c. filum terminale d. foramen magnum most superior boundary of the spinal cord meningeal extension beyond the spinal cord terminus spinal
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Respiratory system Asthma A chronic (long term) lung disease that inflames and narrows the airways‚ asthma causes recurring periods of wheezing ( a sound when you breathe)‚ chest tightness‚ shortness of breath‚ and coughing. The coughing often occurs at night or early in the morning. Asthma is characterized by inflammation of the bronchial tubes with increased production of sticky secretions inside the tubes. People with asthma experience symptoms when that airways tighten‚ inflame or fill with mucus
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TMA 2 Part 1 Describe how neurons in the central nervous system communicate. Using examples‚ discuss how this has helped us to understand human behaviour. Human cognition‚ emotion‚ motivation and ultimately life is made possible by neurons in the central nervous system (CNS). This essay will briefly describe the processes involved in neuronal communication and discuss how this knowledge has helped improve our understanding of human behaviour‚ specifically with regards to neurological
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Homeostasis is defined as the adjustments a body makes to maintain an environment conducive to life. All of the organ systems in the human body must maintain a steady internal environment for the body to function properly. The factors that need to be controlled are water and salt content‚ PH balance‚ oxygen‚ sugar‚ protein‚ body temperature‚ and blood and glucose concentration. The basic principle of homeostasis is when there is an abnormal internal condition‚ it will be detected and a variation
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