A misguided athlete ingests a large amount of dietary K+ because she thinks it will boost muscle performance. Instead, the majority of this extra K+ is secreted into filtrate and excreted in the urine.
Answer the following statement true (T) or false (F)
True
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Selective permeability of the membrane is primarily determined by
a. membrane phospholipids b. how much cholesterol is present c. the number and type of membrane proteins d. the charge of the membrane e. none of these
Which of the following is NOT true about the heart?
A. Knowing the heart's position is important for effective CPR. B. The apex of the heart is directed superiorly and to the left. C. The heart is located in the mediastinum. D. The heart is about the size of a closed fist.
Cancer is the most common cause of death in the United States.?
Indicate whether the statement is true or false
Water-soluble molecules such as glucose and amino acids move across the blood-brain barrier by
A. diffusion. B. endocytosis. C. exocytosis. D. mediated transport. E. filtration.