Generally, a chemical buffer is described as
A. a strong acid or strong base that brings the pH of a solution to 7.0.
B. a weak acid and weak base that help prevent big changes in pH.
C. a weak acid that makes a solution slightly more basic by its presence.
D. a neutral molecule that does not influence the pH in any way.
Answer: B
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The sequence of symptoms of heatstroke is
A. intense itching, profuse sweating, kidney failure, racing pulse, headache. B. neurological symptoms, dizziness, skin reddening, and then headache and racing heart. C. headache, dizziness, exhaustion, then sweating, which stops as the skin becomes red, hot, and dry. D. fever, itching, redness, headache, numb extremities, vomiting.
Which of the following is not one of the four proximal carpal bones?
A) scaphoid B) lunate C) pisiform D) hamate E) triquetrum
Intermediate filaments account for about 85% of the protein present in muscle and liver cells
Indicate whether the statement is true or false