Daphnia and Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression
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because the cardiac muscle cells depolarize. 4. How do the sympathetic and parasympathetic nervous systems work together to regulate heart rate? Sympathetic neurons increase the heart rate while the parasympathetic neurons decrease the heart rate and the heart simultaneously receives both neurons signals. 5. What does this tell you about the parasympathetic nervous system in relation to the sympathetic nervous system and hormones? That when one increases the other
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The enteric nervous system is composed of the myenteric plexus (Auerbach’s plexus) and the submucosal plexus (Meissner’s plexus)‚ and it consists of a network of nervous fibers‚ ganglion cells (sensory and effectors neurons)‚ and interneurons richly interconnected by reflex arcs located in the wall of the gastrointestinal tract and directed
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The Nervous System and Aging Sensory changes can influence the way we see‚ hear‚ taste‚ smell‚ and respond to touch and pain. This in turn affects how we experience the world and react to things. A significant sensory change can rob us of many simple pleasures and complicate the tasks of daily living. It may mean reduced mobility‚ increased dependence on others‚ inaccurate perception of the environment‚ reduced ability to communicate and socialize‚ or loss of self-esteem. Sensory changes vary
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An explanation of the physiology of two named body systems in relation to energy metabolism in the body. (P4) In this assignment I will be explaining the physiology of two named body systems in relation to energy metabolism in the body‚ the Respiration system and the Digestive system. I will start off by giving a definition of energy metabolism in the body. Metabolism in the body is a collection of chemical reactions that takes place in the body’s cells. Metabolism converts the nutrients in the
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Assignment 3 Written Essay Questions 1. a) We are able to experience different types of sensations because our nervous system encodes messages. German physiologist Johannes Muller in his doctrine of specific nerve energies described a kind of code which is anatomical. In his doctrine‚ Muller explains that different sensory modalities exist because signals received by the sense organs stimulate different nerve pathways that lead to different areas of the brain. For example‚ when the ear
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human and animal behavior. It covers everything from genetics‚ brain‚ immune system‚ and nervous system. It defines how and why a person is reacting the way they do. Biological perspective for example discusses that a person being aggressive can be due to possible brain damage. Biological perspective explains how your nervous system can be reaction to stress. I will discuss how biological perspective discusses the parasympathetic and sympathetic‚ along with various hormones and how it can impact with
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maintain a constant condition in a biological system by means of automatic mechanisms that work against influences leaning towards disequilibrium. This action primarily aims to preserve relative constancy in the body when severe changes occur in the external environment‚ as it very important for the body to maintain homeostasis in order to survive. If conditions happen to drift too far‚ certain biochemical reactions are ignited
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auditory nerve and is composed of three divisions‚ the external ear‚ the middle ear‚ and the inner ear. The greater part of which is enclosed within the temporal bone. The ear is looked upon as a miniature receiver‚ amplifier and signal-processing system. The structure of the outer ear catching sound waves as they move into the external auditory canal. The sound waves then hit the eardrum and the pressure of the air causes the drum to vibrate back and forth. When the eardrum vibrates its neighbour
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Essay on EKG Replacement for missing work By Mohammad Chenchar http://www.webmd.com/heart-disease/electrocardiogram http://www.nobelprize.org/nobel_prizes/medicine/laureates/1924/einthoven-bio.html http://www.ecglibrary.com/ecghist.html EKG is an electrocardiogram‚ a machine used to check on problems with your electrical activity with your heart. An electrocardiogram machine translates the heart’s electrical pattern into lines that specific professionals can read
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