Lab 28B: Endocrine System Physiology Computer Simulation Introduction The endocrine system is the second greatest control system of the body and has many effects on the tissues and organs. The thyroid gland‚ which is a part of the endocrine system‚ releases a hormone that maintains metabolism. This hormone is thyroxine. Thyroxine production is controlled by thyroid stimulating hormone‚ which is released by the pituitary gland. TSH stimulates the thyroid gland to produce thyroxine. In
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Human Science – CHAPTER 1 1. Which Organ system maintains a relatively slow-acting degree of control over most bodily functions? Endocrine System (hormones act in minutes to hours‚ in contrast to nerve impulses‚ which act in fractions of a second). 2. The esophagus and the trachea run side-by-side through the thorax. In which systems are these organs found? The esophagus belongs to the digestive system‚ and the trachea belongs to the respiratory system. (The esophagus carries food to the stomach
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11: Fundamentals of the Nervous System and Nervous Tissue Study guide Functions and Divisions of the Nervous System 1. List the basic functions of the nervous system. 2. Explain the structural and functional divisions of the nervous system. Histology of Nervous Tissue 3. List the types of neuroglia and cite their functions. 4. Define neuron‚ describe its important structural components‚ and relate each to a functional role. 5. Differentiate between a nerve and a tract
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independent of the nervous system. • sinoatrial node- is the impulse-generating (pacemaker) tissue located in the right atrium of the heart‚ and thus the generator of normal sinus rhythm. • pacemaker cells- are specialized cells that cause involuntary muscles and tissues to contract or dilate. • vagus nerves- carry a wide assortment of signals to and from the brain‚ and they are responsible for a number of instinctive responses in the body. 2. The sympathetic nervous system releases the neurotransmitter-
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We are able to visualize‚ feel‚ smell‚ and hear the world around us due to a system called the sensory system. All around the surface of our body we have detectors that are known as receptors. These receptors‚ in the form of cells‚ are specialized to capture specific forms of energy- whether heat‚ light‚ chemical‚ or mechanical (1). The environmental cues that are detected by our receptors on the surface of our body are then transformed into electrical signals‚ or nerve impulses‚ that can be sent
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resumed the heart is called the vagal escape. 2. The SA node of the heart is located in the right arterial wall 3. Describe how the sympathetic and parasympathetic nervous systems work together to regulate the heart rate. a. The sympathetic and parasympathetic are two branches of the autonomic nervous system. Both supply nerve impulses to the heart. The sympathetic (fight or flight)‚ becomes more active when needed. Stimulation will increase the heart rate and force of contractions
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between the central‚ autonomic‚ and somatic nervous systems. Central nervous system: Prefrontal cortex‚ precentral gyrus‚ postcentral gyrus‚ hypothalamus‚ amydaloid nucleus‚ periaqueductal gray‚ pontine micturition center Autonomic nervous system: Sympathetic: Lateral horn cells of T10-L2 segments of spinal cord (Preganglionic motor fibres)→Synapse with superior hypogastric plexus→ Hypogastric nerve (Postganglionic motor fibres) → UB Parasympathetic: Lateral horn cells of S2-S4 segments of spinal
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with stress‚ which can be a source of illness . One study observed neural activity in seniors while they walked or interacted with a dog. It turned out that walking with a dog gave seniors a boost in parasympathetic nervous system activity‚ which is good because the parasympathetic nervous system helps calm and rest the
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Milestone 1: Organ System Assessment Muscular System: Characteristics Skeletal Cardiac Smooth Body Location Attached to bones or‚ for facial muscles‚ to skin Walls of the heart Mostly in walls of hollow visceral organs (other than the heart) Cell Shape and Appearance Single‚ very long‚ cylindrical‚ multinucleate cells with very obvious striations Branching chains of cells; uninucleate‚ striations; intercalated discs Single‚ fusiform‚ uninucleate; no striations Connective Tissue Components Epimysium
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control system‚ changes are reversed and returned back to the set level. There are four different homeostatic mechanisms for regulation these four are the heart rate‚ breathing rate‚ body temperature and blood glucose levels. Negative feedback system is made out of receptors to detect change‚ a control centre to receive the information and process the response and effectors to reverse the change and re-establish the original state. (Anatomy & Physiology‚ 2013) The autonomic nervous system controls
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