Question

Question 1:

Reabsorption of water in the hindgut of insects is controlled by which of the following?

ion concentration of hemolymph

selective absorptive processes that take place in the Malpighian tubules

osmoregulators in the rectal gland

osmotic gradients created by ion pumps

Question 2:

The filtrate formed in the renal corpuscle is analogous to the _____ formed in Malpighian tubules.

hypertonic solution

pre-urine

uric acid

hemolymph

Question 3:

Glucose is removed in the proximal convoluted tubules. Therefore, glucose is not expected to be found in a normal urine sample. However, glucose is found in the urine of diabetics. Why is this the case?

More glucose can pass into the nephron because the concentration of the glucose in the blood is very high.

Glucose is passing from the blood surrounding the nephron and into the pre-urine.

Diabetics have active transport of glucose from the blood into the pre-urine when blood glucose levels become very high.

The transport of glucose from the pre-urine back to the blood cannot occur at a rate fast enough to remove all of the glucose from the urine.

Question 4:

Why might a desert animal have longer loops of Henle than an aquatic one?

To better conserve electrolytes

To prevent ion loss requires active transport.

To better produce hypotonic urine

To create larger osmotic gradients

Question 5:

When a cell is in equilibrium with its environment, which of the following occurs for substances that can diffuse through the cell?

All movement of molecules is directed by active transport.

There is directed movement of substances into and out of the cell.

There is no movement of substances into and out of the cell.

There is random movement of substances into and out of the cell.

Question 6:

Which of the following best describes the process of ventilation?

the diffusion of gases into and out of the circulatory system

the movement of the respiratory medium past the respiratory surfacethe movement of oxygen gas through the blood of the circulatory system

the diffusion of gases into and out of tissues where cellular respiration occurs

the movement of carbon dioxide gas through the blood of the circulatory system

Answer 1

1. Reabsorption of water in the hindgut of insects is controlled by osmotic gradients created by ion pumps
2. The filtrate formed in the renal corpuscle is analogous to the pre-urine formed in Malpighian tubules.
3. The glucose is found in the urine of diabetics because the transport of glucose from the pre-urine within the proximal tubule back to the blood cannot occur at a rate fast enough to remove all of the glucose from the urine.
4. A desert animal have longer loops of Henle than an aquatic one to create larger osmotic gradients.
5. When a cell is in equilibrium with its environment, there is random movement of substances into and & out of the cell.
6. The movement of the respiratory medium past the respiratory surface describes the process of ventilation.