ANATOMY AND PHYSIOLOGY OF THE HEART Anatomy: The heart and heart wall layers: The heart is located in the left side of the mediastinum; it consists of three muscle layers the Endocardium‚ myocardium‚ and epicardium. The epicardium is the outermost layer of the heart. The myocardium is the idle layer of and actual contracting muscle of the heart. The endocardium is the innermost layer and lines the inner chambers and heart valves. Pericardial sac: The pericardial sac encases and protects
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Multiple Choice Chapter 6 1. A‚ C‚ D‚ E 2. A 3. C 4. B‚ D 5. A‚ B‚ C‚ D 6. B‚ C 7. B‚ D 8. A‚ B 8. Isotonic contraction (“same tone” or tension) - In isotonic contractions‚ myofilaments are successful in their sliding movements‚ the muscle shortens‚ and movement occurs. Contractions in which the muscles do not shorten are called isometric contractions (“same measurement” or length). In isometric contractions‚ the myosin mysofilaments are “skidding their wheels‚” and the twnaion
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Cardiovascular System Anatomy & Physiology The heart is the pump responsible for maintaining adequate circulation of oxygenated blood around the vascular network of the body. It is a four-chamber pump‚ with the right side receiving deoxygenated blood from the body at low presure and pumping it to the lungs (the pulmonary circulation) and the left side receiving oxygenated blood from the lungs and pumping it at high pressure around the body (the systemic circulation). The myocardium (cardiac
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A and P II Chapter 24 practice test 1. Which of the following digestive regions is responsible for the propulsion of materials into the esophagus? Answer: pharynx 2. The active process that occurs when materials enter the digestive tract via the mouth is: Answer: ingestion 3. Sympathetic stimulation of the muscularis externa promotes: Answer: muscular inhibition and relaxation 4. Which of the following statements about peritonitis is false? Answer: It leads to inflammation of the digestive mucosa
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Horner’s Syndrome Anatomy and physiology Horner’s syndrome is a rare condition that targets the nerves in one’s eyes and face. Horner’s syndrome is caused by any type of interruption in a pack of nerves that begin in a part of one’s brain that is called the hypothalamus and it travels to one’s face to their eyes. Horner’s syndrome’s symptoms include‚ drooping eyelips‚ and small constricted pupil. In an eye examine one’s eye may have changed in the way one’s pupil opens and closes or
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Tissues in the Body Unit 5 – Anatomy and Physiology for Health and Social Care Epithelial Cuboidal – cube shaped‚ prominent nucleus. Can be found in medulla of kidney. Does not allow for passive diffusion easily. Columnar – tall‚ vertical‚ thick cells. Can be found in the small intestine. Does not allow passive diffusion easily. Active transport is needed. Move nutrients from intestine to blood = absorption! Can have microvilli to increase surface area. Squamous – large‚ thin and prominent
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Human Physiology Lab Special Senses Cutaneous Senses and Vision September 24/26‚ 2012 Our bodies are capable of sensing a wide spectrum of stimuli. We are consciously aware of some of the information our bodies perceive‚ but much of the information that is sensed is beyond our consciousness. Receptors responsible for perception of stimuli are found in many places: skin‚ eyes‚ ears‚ mouth‚ blood vessels‚ lungs‚ brain—frankly‚ every cell in the body has sensory receptors. These receptors are
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renal excretion -anddecreased tubular re-absorption of lipophilics. Importance of Drug Metabolism CH 3 CH 2OH CHO COOH OH O C 2H 5 Δ1-THC PC=6000 - O C O O HO OH COO OH OH Excreted Form O C 2H 5 1 Importance of Drug Metabolism • Metabolism => Termination of Drug Action – Bioinactivation -and/or– Detoxification -and/or– Elimination -and/or- Importance of Drug Metabolism • Metabolism => Termination of Drug Action – Bioinactivation
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BTEC BIOLOGY ASSIGNMENT 3 TASK 1 HOMEOSTASIS Homeostasis can be defined as a point of balance or internal equilibrium that all kind of system both living and non-living can work to keep themselves in this state of balance. Mechanisms of homeostasis in human body Temperature Regulation: If your body too hot or cold‚ there are several ways in which your temperature can be controlled. They involve sweating‚ shivering‚ capillaries and hairs. As we learn in the class when your body becomes; Too
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1. Describe the general structure and function of the nervous system. The Nervous System is a "network" which delivers information and monitors the processes taking place in our bodies at all times. The nervous system in all its aspects allows us to function as a single controlled and coordinated unit. The basic nerve cell nerve cell is a neuron; a chain of neurons is actually a "communication cable "inside our bodies. Neuron structure is basically the cell nucleus‚ the dendrites which receive information
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