Multiple Choice
0.302 grams of an antibiotic was dissolved in enough water at 23.6°C to make 500.0 mL of solution. The solution has an osmotic pressure of 8.34 mm Hg. What is the molar mass of the antibiotic?
6. Chemical Quantities & Aqueous Reactions
Osmolarity
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The high osmolarity of the renal medulla is maintained by which of the following?
A
Countercurrent multiplication in the loop of Henle
B
Reabsorption of water in the distal convoluted tubule
C
Active transport of glucose in the proximal tubule
D
Filtration in the glomerulus
Verified step by step guidance1
Understand the concept of osmolarity: Osmolarity refers to the concentration of solute particles in a solution. In the renal medulla, high osmolarity is crucial for the kidney's ability to concentrate urine.
Learn about the loop of Henle: The loop of Henle is a section of the nephron in the kidney that plays a key role in concentrating urine. It consists of a descending limb and an ascending limb, each with distinct functions.
Explore countercurrent multiplication: This is a mechanism that occurs in the loop of Henle, where the flow of fluid in opposite directions in the descending and ascending limbs creates a gradient that helps concentrate solutes in the renal medulla.
Consider the role of water reabsorption: While water reabsorption occurs in various parts of the nephron, the distal convoluted tubule is involved in fine-tuning the reabsorption process, but it is not the primary mechanism for maintaining high osmolarity in the renal medulla.
Evaluate other processes: Active transport of glucose in the proximal tubule and filtration in the glomerulus are important for kidney function but do not directly contribute to the high osmolarity of the renal medulla.
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