easily absorbed into the intestine to be secreted out of the body. Vasodilators are medications which cause the blood vessels within the human body to dilate. Vasodilators just don’t affect the vessels‚ but also the muscles and the walls of veins and arteries within the human body. Vasodilators are used to prevent the muscles in the body from tightening which allows easy blood flow throughout
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veins and arteries in blood traveling to or from the heart and containing oxygenated or deoxygenated blood (and the exception). The arteries job is to take oxygenated blood and transport if to the other organs and cells of the body‚ away from the heart. Then the veins carry deoxygenated blood back to the heart from the organs. The two exceptions to this is the pulmonary arteries and veins. The pulmonary arteries take deoxygenated blood and delivers it to the the lungs. While the pulmonary veins take
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Occasionally‚ a large ventricular septal defect can cause pulmonary hypertension‚ a condition where high blood pressure causes the heart to work harder. Unless the septal hole is corrected‚ the patient may eventually experience heart
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body through the vena cava and pumps it through the pulmonary artery to the lungs‚ and the left side receives the oxygenated blood from the lungs through the pulmonary vein and pumps it into the aorta to be distributed all over the body bringing oxygen and glucose to cells who need it for respiration. A natural pacemaker made of nerve
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ejected into the pulmonary trunk or aorta normally not flow back through the semilunar valve? Back-flowing blood in the ventricles force the semilunar valves to close 12. From which vessels do each of the atria receive blood? Into which vessels do the ventricles eject blood? The right atrium receives blood from the vena cava and sends it to the right ventricles through the tricuspid valve; the right ventricle sends the blood into the pulmonary trunk through the pulmonary valve; the left atrium
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1.6 VESSELS: ARTERIES‚ VEINS & LYMPHATICS CARDIOVASCULAR SYSTEM Structure • heart‚ arteries‚ arterioles‚ capillaries‚ venules‚ veins Functions • transportation (oxygen‚ carbon dioxide‚ nutrients‚ wastes‚ wastes hormones) • regulation (pH‚ body temperature‚ temperature fluid & electrolytes) Principle arteries and veins CARDIOVASCULAR SYSTEM • Heart: pumps blood • Artery: vessel leaving the heart (Arteries take blood AWAY from your heart) • Vein: vessel going to the heart • Capillaries:
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right ventricle‚ left atrium and the left ventricle. Blood travels through the four chambers by the heart muscle contracting and relaxing pumping blood to the body and lungs. Blood vessels such as the arteries and veins are what transport the blood away from the heart and to the heart. The arteries transport blood away from the heart to the body organs‚
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Study guide for Lecture Exam II Bio 202 (Heart‚ BV’s and Respiratory system) 1. The pulmonary circuit is supplied by which ‘side” of the heart? The systemic circuit? The right atrium 2. What is the functional difference between desmosomes and gap junctions? Desmosomes prevent adjacent cells from separating during contraction and gap junctions allow ions to pass from cell to cell transmitting current across the entire heart 3. What are the different effects of the PNS and SNS on heart rate?
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Vertebrate Physiology Study Guide Last Part of Chapter 10 □ Cilia are specialized for odor detection (They have receptors and second messenger machinery □ Mucus from the olfactory glands traps odorants □ Linda Buck identified a large family of odorant receptor genes in rats(1‚000 types); belong to the G protein associated 7-transmembrane receptor family □We only have 400 odorant receptors; the olfactory system appears to use combinations of receptors(words) to greatly reduce the number of
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Unit 1 Questions 1- 3 Figure 1 The sources of blood glucose in a human body during a normal day of 24 hours are shown in the above figure. Glucose is primarily derived from glycogenolysis occurring between meals. Glucose is chiefly sourced from the dietary intake for few hours following the principal meals of the day. Late at night‚ gluconeogenesis becomes the predominant source of glucose. 1 Glycogenolysis decreases after midnight because A C 2 gluconeogenesis takes place. hepatic glycogen is
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