What happened to the urine concentration as the solute concentration in the interstitial space was increased? how well did the results compare to your prediction?

The answer is that the urine concentration increased (became less dilute). This because of the increased electrolyte concentration in the blood. It causes the hypothalamus-pituitary gland to relead anti-diuretic hormone (ADH). This hormone increases the aquaporin 2 pore in the distal tubules and collecting tubules of the nephrons in the kidneys. Water is reabsorbed from urine hence making it more concentrated.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.