Exercise 6: Cardiovascular Physiology: Activity 4: Examining the Effects of Chemical Modifiers on Heart Rate Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The parasympathetic nervous system releases __________ to affect heart rate. You correctly answered: d. acetylcholine 2. A cholinergic drug that worked the same as acetylcholine would You correctly answered: c. be an agonist and decrease heart rate. 3. Norepinephrine affects the heart rate
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Abstract Stress is a common condition‚ a response to a physical threat or psychological distress‚ that generates a host of chemical and hormonal reactions in the body. In essence‚ the body prepares to fight or flee‚ pumping more blood to the heart and muscles and shutting down all non-essential functions. As a temporary state‚ this reaction serves the body well to defend itself. However‚ when the stress reaction is attenuated‚ the normal physical functions that have been either exaggerated or shut
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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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differentiate between the effects of the two drugs at different concentrations on the motility of the gut. Smooth muscle activity is controlled by the autonomic nervous system where the sympathetic and parasympathetic divisions work against each other‚ thus this experiment allowed us to deduce how one division slows the digestive system and the other accelerates it. Results Fig. 1(on separate sheet) portrays the trace from the kymograph. It is a graphical representation of the mechanical rhythm
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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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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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that ovarian steroid hormones‚ such as estrogen‚ may influence sympathetic nerve activation‚ having a reduced blood flow effect in pre-menopausal women (Cooke: 303). Specifically‚ they state that estrogen may have a “tonic effect on sympathetic nerve traffic‚ a direct effect on adrenergic signaling‚ and/or amplification of adrenergic response by vasoconstrictor prostanoids.” (Cooke: 303). Thus‚ estrogen-influenced reduction of sympathetic nerve stimulation (in turn blood flow to the digits) may be
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Contents page The health and specifically mental health of an individual is multi-faceted‚ and is not simply influenced by one or two factors. In order to successfully understand an individual’s mental state it is vital to be able to distinguish between mental health and mental illness. Mental health describes a state of emotional and psychological well-being in which an individual is able to us their cognitive and emotional capabilities
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during exercise. The heart is controlled by the sympathetic nervous system and the parasympathetic nervous system. These two systems control the rate of the heart‚ so it is beating enough oxygenated blood around the body to provide respiring muscle tissues with the right amount of oxygen. For example‚ when the body is exercising‚ more oxygen is needed in the muscles‚ so the heart needs to pump faster to accommodate this. The sympathetic nervous system is responsible for the increase of the heart rate
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