This system consists of specialized structures and capillary networks that assist in the excretory process. The human excretory system includes the kidney and its functional unit‚ the nephron. The excretory activity of the kidney is modulated by specialized hormones that regulate the amount of absorption within the nephron. Kidneys 1 ). They are bean-shaped organs located on either side of the backbone at about the level of the stomach and liver. Blood enters the kidneys through renal arteries and
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via renal artery and leaves each kidney via renal vein -Urine exists the kidney through a duct called the ureter and the uruters of both kidneys drain into a common urinary bladder -Kidney consists of outer renal cortex and inner renal medulla -Nephron is functional unit of vertebrate kidney -Consists of single long tubule and ball of capillaries called the glomerulus -Bowman’s capsule surrounds the glomerulus -Kidney regulates the composition of the blood and produce urine -Filtration occurs
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Companies‚ Inc. Permission required for reproduction or display. 3. 17 -7 Two distinct regions are found within the kidney: a renal medulla and a renal cortex. a. The renal medulla houses tubes leading to the papillae. b. The renal cortex contains the nephrons‚ the functional units of the kidney.
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pelvis _8__ renal column _9__ renal pyramid _1__ ureter Type the number of the following structures using the numbered lines in the diagram in the lab book of the nephron: _9__ afferent arteriole _8__ collecting duct _4__ distal convoluted tubule _10__ efferent arteriole __3_ glomerular capsule __2_ glomerulus _6__ nephron loop _5__ peritubular capillaries _1__ proximal convoluted tubule _11__ renal papilla _7__ vasa recti Activity 3 – Matching Number the following
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HOMEOSTASIS BIOLOGY I BIO091 Prepared by: Nur Syakireen Bt. Ishak SCOPE •Definition and importance of homeostasis •Homeostatic organ •Negative and positive feedback mechanisms •Blood-glucose regulation •Thermoregulation •Osmoregulation DEFINITON & IMPORTANCE OF HOMEOSTASIS Homeostasis • Homeostasis: • is the steady state of physiological condition of the body. • it is the physiological processes by which organisms maintain a constant & balanced internal environment. • In achieving
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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? =Distal convoluted tubule Reabsorption of high levels of glucose and amino acids in the filtrate is accomplished by ________. =secondary active transport Approximately 80% of the energy used for active transport is devoted to the reabsorption of _______________. =Sodium Each nephron consists of a _______________‚ which
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clearance — Regulation of RBC production — Synthesizing vitamin D to the active form — Secreting prostaglandins — Regulating calcium and phosphorus balance. Nephron ž Each kidney has about 1 million nephrons ž Two types — Cortical nephrons — Juxtamedullary nephrons FUNCTIONS OF THE NEPHRON 1. Filtering plasma through the glomerulus 2. Reabsorb and secrete substances along tubular tract. 3. Form a filtrate (urine) that is protein
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calyces; small renal papillae project into each minor calyx. 3. Two distinct regions are found within the kidney: a renal medulla and a renal cortex. a. The renal medulla houses tubes leading to the papillae. b. The renal cortex contains the nephrons‚ the functional units of the kidney. D. Kidney Functions 1. The kidneys function to regulate the volume‚ composition‚ and pH of body fluids and remove metabolic wastes from the blood in the process. 2. The kidneys also help control the rate
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Each kidney are made up of filtering units called nephrons that filter small amount of blood that work in a two part process. The glomerulus allows fluids and waste to pass through it‚ however‚ prevents large molecules‚ blood cells‚ and most proteins from passing. The filters fluid passes through the tube and sends needed minerals back to the blood stream and removes waste (niddk.nih.gov). The glomerulus is the most important component of the nephron. It consists of the capillary endothelial cells
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Homeostasis is the maintenance of a steady state. With changes within and around living cells‚ conditions are maintained at a constant level. The ‘two major control systems‚ nerves and hormones‚ are mainly responsible for co-ordinating homeostatic mechanisms’ (Human Body) whilst using feedback. If a change in condition is detected a corrective mechanism is activated‚ conditions return to set point and the corrective mechanism is then switched off. The conditions are then at constant level. Some of
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