click below
click below
Normal Size Small Size show me how
chapter 16 a/p
| Question | Answer |
|---|---|
| The outer layer of a kidney is the ________, and it contains the ________. | renal cortex; renal corpuscles |
| When the _________ detects a decrease in the glomerular filtration rate it secretes ________ to start the renin (--) angiotensin mechanism. | juxtaglomerular apparatus; renin |
| Buffers either combine with or release ________ to maintain the pH of blood within normal limits. | hydrogen ions |
| With a normal glomerular filtration rate, the entire volume of blood in the body will be filtered approximately every ______ minutes. | 40 |
| The ________ is a capillary tuft that lies between an afferent arteriole and an efferent arteriole. | glomerulus |
| Under normal conditions, which of the following substances would not appear in the filtrate | protein |
| The primary function of the urinary system is to | maintain the volume and composition of body fluids within normal limits. |
| A ________ consists of a renal corpuscle and a renal tubule. | nephron |
| During reabsorption of solutes in the proximal tubule, most of the Cl- ions and HCO3- ions are moved by ________ mechanisms. | passive transport |
| ________, formed by the breakdown of bile pigments in the intestine, gives the characteristic color to urine. | Urochrome |
| The functional unit of the kidney is the | nephron. |
| Urine formation begins when _________ moves some of the water and solutes in blood from the glomerulus into the glomerular capsule. | filtration |
| The fluid in the glomerular capsule contains the same substances as blood plasma except it lacks | proteins. |
| In the ________, nutrients and positive mineral ions are actively reabsorbed from the filtrate into blood in the peritubular capillary. | proximal convoluted tubule |
| Which of the following ions is secreted into filtrate rather than being reabsorbed | Mg+ ions |
| Angiotensin II raises systemic blood pressure by triggering mechanisms that | constrict arterioles and increase water retention. |
| The kidneys receive approximately ______ of the total cardiac output each minute. | 1/4 |
| The kidneys assist in the blood's ability to transport oxygen due to the secretion of the hormone | erythropoietin. |
| Antidiuretic hormone regulates the passive reabsorption of water from filtrate in the | collecting duct. |
| A _________ carries urine from a kidney to the urinary bladder. | ureter |
| The removal of amine groups from amino acids results in the formation of ________, the most abundant nitrogenous waste in urine. | urea |
| During reabsorption of solutes in the proximal tubule, most of the amino acids, glucose, Na+ ions, K+ ions, and Ca2+ ions are moved by ________ mechanisms. | active transport |
| The ability of the body to reabsorb significant quantities of water from the filtrate is due to | all of these choices are correct |
| Approximately 65% of tubular reabsorption occurs in the | proximal tubule. |
| Aldosterone regulates the active reabsorption of sodium ions and secretion of potassium ions by the | distal convoluted tubule. |