medullary osmotic gradient - The amount of ADH (antidiuretic hormone) present at the collecting ducts. d. Describe the collecting duct role relative to urine concentration. Depending on the body fluid osmolarity‚ the collecting duct reabsorbs water & forms concentrated urine or if water is allowed to pass‚ dilute urine is formed. Medullary Osmotic Gradient 2. Identify the three factors in the nephron determine the osmotic gradient. 1- Differences in water and solute
Premium Nephron Kidney
I. Describe the role of the following hormones in the formation of urine‚ specifically explain the stimulus for their release‚ actions (decrease/increase GFR) and whether or not dilute/concentrated urine results): ADH (Vasopressin) – ADH has an antidiuretic action that prevents the production of dilute urine. Formation of urine = in the DCT and collecting ducts‚ water movement out of the body is regulated by ADH. Stimulus for their release = lowered blood pressure or low salt or water concentration
Premium Kidney Hypothalamus Endocrine system
Physiology Exercise 9 page. 121 SC 245 L Date: 12/18/2011 Point Break down: 100 points Questions: 60 points Data/Results: 15 points Summarizing activities: 25 points Introduction: In this lab we will learn how the kidney processes blood and produces urine. Activity 1: Investigating the Effect of Flow Tube Radius on Glomerular filtration. Data/Results: Questions: Please answer the questions in complete sentences and explain your answers. 1. What effect does increasing the afferent radius have on
Premium Kidney Diabetes mellitus Nephrology
that when individuals consume large amounts of liquid‚ they eliminate much of the liquid through urine. On the other hand‚ when individuals are severely dehydrated very little urine is formed. This certainly illustrates that control mechanisms in the human being can regulate the amount of urine that is formed. When tap water is ingested‚ there is a relatively rapid elimination of the water in the urine. However‚ when salt is ingested‚ there is a considerable delay in the excretion of water because
Premium Kidney Urine Ureter
between the two types of nephrons? g. Nephron – structural and functional units that form urine h. Types i. Cortical nephrons – makes up 85% of nephrons; located in cortex ii. Juxtamedullary nephrons – located at the cortex-medulla junction; have long loops of Henle that deeply invade the medulla; have extensive thin segments; involved with production of concentrated urine 5. Identify the different parts of the nephron and describe the major function or processes
Premium Kidney Urine Urinary bladder
Microorganisms: * Small living organisms; there are 3 types * Bacteria – ecoli‚ salmonella * Fungi – mushrooms‚ athletes foot * Virus – influenza (flu)‚ HIV * When they enter our body‚ they multiply and release toxins / harmful chemicals into our blood * They duplicate every 20 minutes * Physical barriers: eyelashes prevent MO’s from entering through our eyes‚ nasal hairs reduce them‚ skin is a barrier to them (although they can enter through cuts)‚ chemicals in tears
Premium Blood Heart Artery
of Urinary System The urinary system consists of the kidneys‚ ureters‚ urinary bladder‚ and urethra. The kidneys filter the blood to remove wastes and produce urine. The ureters‚ urinary bladder‚ and urethra together form the urinary tract‚ which acts as a plumbing system to drain urine from the kidneys‚ store it‚ and then release it during urination. Besides filtering and eliminating wastes from the body‚ the urinary system also maintains the homeostasis of water‚ ions‚ pH‚ blood pressure‚ calcium
Premium Kidney Blood Urinary system
the bloodstream. They then process this filtrate‚ allowing wastes and excess ions to leave the body in urine while returning needed substances to the blood in just the right proportions. Factors that affect urine volume are fluid intake and reabsorption‚ which affects the amount of urine released. Urine concentration is measured by the concentration of dissolved solids present in a person’s urine‚ which is affected by water intake levels as well as diet (the amount of sodium in person’s diet). The
Free Urine Kidney
Osmosis Experiment Diana Arrowood Grand Canyon University BIO-100L Biology Concepts September 16‚ 2011 Osmosis Experiment Directions Use the information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until
Premium Osmosis Blood
25-Urinary System Aldosterone 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)
Free Kidney Nephron