Diffusion ________ the entropy of a solution.
A. decreases
B. does not change
C. increases
Answer: C
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Solution 1 has two solutes (A and B) and an osmotic pressure of 250 mOsm. Solution 2 has only one solute (C) and an osmotic pressure of 300 mOsm. If a membrane between these solutions is permeable to only water and B, then
a. Solution 1 will gain water from solution 2. b. Solution 2 will gain water from solution 1. c. Some of solute C will move into solution 1. d. Solution 1 has a higher osmotic pressure. e. Solution 1 would be hypertonic to a human cell.
The first nerve cell receiving an impulse directly from a receptor is called a motor or efferent neuron
a. True b. False Indicate whether the statement is true or false
Describe immunodeficiency diseases
A) Immunodeficiency diseases are conditions that result from the production of antibodies directed against normal antigens in the body. B) Immunodeficiency diseases are an inadequate immune responses due to problems with embryonic development of lymphoid organs and tissues, a viral infection, or treatment with or exposure to immunosuppressive agents. C) Immunodeficiency diseases are an immune response to a circulating antigen that stimulates mast cells throughout the body to release chemicals that prompt the inflammatory response. D) Immunodeficiency diseases are excessive immune reactions of antibodies to a virus-infected cell. E) Immunodeficiency diseases are excessive immune responses to an allergen, which is an antigen that triggers an allergic reaction.
Changes in oxygen levels in the blood are the most important stimuli for breathing in a healthy person
Indicate whether the statement is true or false