Answer to Question 1
ANS: A
Shock leads to decreased renal perfusion. An elevated BUN accompanies this condition. The creatinine should be normal because no kidney damage occurred. A low BUN signifies overhydration, malnutrition, or liver damage. A low BUN/creatinine ratio indicates fluid volume excess or acute renal tubular acidosis.
Answer to Question 2
ANS: B
Renin is secreted when special cells in the distal convoluted tubule, called the macula densa, sense changes in blood volume and pressure. When the macula densa cells sense that blood volume, blood pressure, or blood sodium levels are low, renin is secreted. Renin then converts angiotensinogen into angiotensin I. This leads to a series of reactions that cause secretion of the hormone aldosterone. This hormone increases kidney reabsorption of sodium and water, increasing blood pressure, blood volume, and blood sodium levels. Inappropriate or excessive renin secretion is a major cause of persistent hypertension. Renin has no impact on Alzheimer's disease, diabetes mellitus, or viral hepatitis.
Crossing Over Results in Genetic Recombination p2
(A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive
An example of an EHR screen used to order a laboratory test.
If the gauge reading is now much higher than the first test results, then the cause of the low ...
The immune response results from activation of the humoral and cell-mediated immune systems
The F1 and F2 results of crosses Sturtevant