A barrier separates two fluid-filled compartments. The barrier is permeable to w

Question

A barrier separates two fluid-filled compartments. The barrier is permeable to water only. Compartment A contains 50 mM glucose, while compartment B contains 50 mM Na CI. In which direction will the net flow of be a) From B to A b) From A to B c) There will be no net flow of water. True (A) or False (B) In biomes with more extreme climates, biotic factors predominate over a biotic factors in determining which organisms are present For a substance that is freely filtered by the kidneys, and is neither reabsorbed nor secreted, the plasma and urine concentrations of that substance are equal. The cogitative properties of a 30 mM urea solution are nearly equivalent to those of a 30 mM glucose solution Increase in colloid osmotic pressure of the blood increases glomerular filtration in the kidney. The presence in the blood of a respiratory pigment (such as hemoglobin) increases diffusion of oxygen in to the blood. The amount of energy expended to cover a fixed distance increases monotonically with the movement speed the animal Which of the following statements is FALSE? a) Animals that are in equilibrium with the environment (with respect to an environmental variable) are "conformers"(with respect to that variable). b) Homeostasis is the process that helps maintain organisms in equilibrium with their environment c) Regulation requires more energy than conformity d) Both biological and chemical processes can be non-equilibrium processes Fish in fresh water will tend to a) Gain solutes and water from the environment b) Lose solutes and water to the environment c) Gain solutes from and lose water to the environment d) Lose solutes to and gain water from the environment Having a high urine/plasma ratio means that a) The animal is producing a dilute urine. b) The animals kidney is retuning less water to the blood. c) The animal is metabolizing more water d) The animal likely has lower concentrations of antidiuretic hormone (ADH). e) The collecting ducts in the animal's kidneys are very permeable to water Which of the following is the correct order, from blood to ureter, of the structures of a mammalian nephro a) Proximal convoluted tubule; Bowman's capsule; loop of Henle; distal convoluted tubule b) Bowman's capsule; loop of Henle: distal convoluted tubule; proximal convoluted tubule c) Bowman's capsule proximal convoluted tubule; loop of Henle; distal convoluted tubule d) Distal convoluted tubule; loop of Henle Proximal convoluted tubule; Bowman's capsule e) Distal convoluted tubule: loop of Henle; Bowman's capsule; Proximal convoluted tubule

Explanation / Answer

1. C ) There will be no net flow of water

This is because the concentration of solutes on both sides of the compartment are equal- 50mM.

2. False : The abiotic factors such as soil , water temperature would determine which organisms are present.

3. False : Since it is readily filtered by the kidneys and not reabsorbed, this would mean that it would not be sent back into the bloodstream, thus the plasma will have a lower concentration of this substance.

4. True : Colligative properties depend on the concentration of the solute irrespective of which solute it is .

5. Years

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