Question
Human Physiology wiz needed
C) the stretch triggers further relaxation of the arteriolar wall, lessening blood pressure. D) the smooth muscle in the vessel walls stretches to accommodate the increased flow and the stretch triggers further relaxation of the arteriolar wall, lessening blood pressure E) none of the above A) hydrogen ions urca C) large proteins D) amino acids E) creatinine 29). One mechanism the kidney uses to raise systemic blood pressure is to A) increase secretion of renin by the juxtaglomerular complex. B) decrease secretion of aldosterone C) increase release of angiotensin II by the suprarenal glands. D) increase filtration into glomerular (Bowman's) capsule. E) decrease urinary albumin concentration 30) The mechanism for producing a concentrated urine involves A) the secretion of antidiuretic hormone (ADH) by the posterior pituitary. B) aquaporins (water chnnels) being inserted into the membranes of the collecting duct cells C) a high concentration of NaCI in the interstitial fluid that surrounds the collecting ducts. D) an increase in water reabsorption by osmosis. E) All of the answers are correct 31). Antidiuretic hormone A) increases the permeability of the collecting ducts to water. B) is secreted in response to low potassium ion in the blood. C) causes the kidneys to produce a larger volume of very dilute urine. D) is secreted by the anterior pituitary E) release is insensitive to the osmolarity of interstitial fluid. 32. A drug that inhibits angiotensin converting enzyme (ACE) may lead to A) less secretion of aldosterone. B) increased urinary loss of sodium. C) reduction of blood pressure. D) decreased sodium reabsorption. E) All of the answers are correct 33. Which of the following substances are not normally found in the filtrate? A) chloride ions B) water C) protein
Explanation / Answer
28) C)Large proteins
Proteins are too large to be filtered through the glomerulus under normal conditions.
29) A) Increase secretion of renin by the juxtaglomerular complex
30) E) All of the answers are correct
It involves the complex interactions among medullary nephron segments and vasculature.
31) A) Increases permeability of the collecting ducts to water
When ADH is present the collecting ducts become permeable to water and high osmotic pressure in medulla then draws out water from the renal tubule.
