Which of the following conditions must be met if diffusion across a membrane is to occur?
A) A concentration gradient must be present, and the membrane can't be permeable to the substance being transported.
B) A concentration gradient must be present, and the membrane must be permeable to the substance that is to be transported.
C) The membrane must be permeable to the substance that is to be transported.
D) A concentration gradient must be present.
B
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Why is there partial relaxation in graph (c)?
A) Calcium ion release is slow. B) The muscle is starting to fatigue. C) Stimulation intensity is fluctuating. D) ATP reserves are cycling. E) Nerve stimulation frequency is below maximum.
Impulses from taste receptors can travel in the facial, glossopharyngeal, and vagus
nerves. Indicate whether the statement is true or false
Thermoregulation is a function of which of the following hormones?
What will be an ideal response?
Which hormone below does not act on the renal tubule?
a. PTH b. ADH c. ANP d. Glucagon e. Aldosterone