Introduction: Homeostasis is the tendency of the body to seek and maintain equilibrium‚ a state of balance‚ within its internal environment. Endotherms are “warm blooded” animals that produce and maintain their own internal body heat. Most mammals and a few birds‚ are endotherms; this is beneficial because the enzymes in the body that carry out metabolic processes have an optimum temperature at which they function‚ having the body constantly be‚ or be close to‚ this optimum internal temperature
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Med/Surg I Major Functions of Kidney: Regulation of Homeostasis -Filters blood & regulates contents (water content & blood volume) -Maintain acid-base balance -Control fluid & electrolytes -Excrete metabolic waste products -Control BP (renin-angiotensin-aldosterone) Urinary System Structure: Kidneys (produce urine)‚ Ureters (transport urine to bladder)‚ Bladder (stores urine)‚ Urethra (conduct urine outside body) *Nephron- working unit of kidney *Kidneys receive 25% of cardiac output=
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Excretion Questions Chaiken of Biology 1. Distinguish between excretion and egestion/defecation. Why is excretion necessary for life? EXCRETION INCLUDES BALANCING (HOMEOSTASIS) REACTION PRODUCTS‚ TOXINS‚ MOLECULES IN EXCESS AND TOO LITTLE. EGESTION INCLUDES MOLECULES THAT ARE EXITING YOUR ANUS CHEMICALLY UNCHANGED 2. Name three excretory organs of humans. What liquids carry the urea that is excreted? Which organ of another studied organism resembles the nephron in function? THREE
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What is Kidney Cancer? Brittany Elliott University of Phoenix Cancer is one of the most devastating chronic diseases in our world today. Cancer of any form can be deadly‚ and often is not detected early enough for effective treatment. It can invade any organ‚ any part of the body‚ at any time‚ without warning or cause. The most common type of cancer that affects your kidneys is called Renal Cell Carcinoma. The term “renal” refers to kidneys‚ and “Carcinoma” is another term for cancer.
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Urinary system Homeostasis Salt provides two elements that are essential for life and for good health - sodium and chloride ions. They are both elements that the body cannot manufacture itself so it must be supplied by food. Although salt is the most common dietary source for these essential elements‚ sodium also available from various foods that contain sodium naturally. Sodium is a mineral element that plays a critical role in body physiology. It controls the volume of fluid in the body and
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structures visible to the naked eye‚ such as the heart‚ lungs‚ and kidneys. Gross anatomy ca be approached in different ways‚ such as Systemic (body structure is studied by systems)‚ Regional (by particular region) or surface (internal structures as the relate to the overlying skin surface). B. Physiology – concerns the function of the body‚ how the body works and carry out their life-sustaining activities. i. Renal physiology – concerns kidney function and urine production. ii. Neurophysiology – explains
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relate to metabolism. Water‚ food‚ oxygen‚ heat and pressure. 7. Compare your own needs for survival with the requirements of organisms described in the chapter. The human body requires homeostasis or a stable internal environment protected from our external environment. 8. Explain the relationship between homeostasis and the internal environment. Our cells as part of organs and organ systems interact in ways to keep our internal
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male‚ age 55 and we will be following what happens to a hamburger‚ fries and a refreshing glass of root beer‚ as its enters his body and begins the process of digestion. After that we will then follow the root beer into the blood stream and to the kidneys‚ through the urinary tract and then our journey will end when the urine is expelled. Let’s begin!! The first step of our journey begins in the mouth. Here food is ground up using his teeth and his saliva helps to moisten the food to help make the
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is a hormone that causes the renal tubules to reclaim sodium ions from the filtrate. =TRUE The kidneys are stimulated to produce renin ________. =by a decrease in the blood pressure An important characteristic of urine is its specific gravity or density‚ which is ________. =1.001-1.035 Which of the following is the functional unit of the kidney? =Nephron In which part of the kidney is reabsorption (1) dependent upon the body’s needs at the time‚ and (2) regulated by hormones?
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Chapter 26 Multiple Fxns of Kidneys in Homeostasis 1. Excretion of metabolic waste products and foreign chemicals 2. Regulation of Water and electrolyte balance 3. Regulation of Arterial pressure --long term: excreting variable amounts of sodium and water --short term: secreting vasoactive factors or substances such as rennin 4. Regulation of Acid-Base balance --the only means of eliminating sulfuric acid and phosphoric acid 5. Regulation of Erythrocyte Production
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