Which of the following statements about resting membrane potential is not true?

(a) The resting membrane potential for most animal cells is 0 mV, because the positive and negative ions are in balance.
(b) The resting membrane potential for most animal cells is positive, because Na+ ions are so plentiful inside cells.
(c) The resting membrane potential for most animal cells is negative, because the inside of the cell is more negatively charged than the outside of the cell.
(d) At the resting membrane potential, no ions enter or exit the cell.


(c)

Biology & Microbiology

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Indicate whether this statement is true or false.

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Reptiles are very efficient in conserving water during excretion

Indicate whether the statement is true or false

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Tadpoles must undergo a major metamorphosis to become frogs. This change includes reabsorption of the tail, growth of limbs, calcification of the skeleton, increase in rhodopsin in the eye, development of lungs, change in hemoglobin structure, and

reformation of the gut from the long gut of an herbivore to the short gut of a carnivore. Amazingly, all of these changes are induced by thyroxine. What is the most likely explanation for such a wide array of effects of thyroxine? A) There are many different forms of thyroxine, each specific to a different tissue. B) Different tissues have thyroxine receptors that activate different signal transduction pathways. C) Some tissues have membrane receptors for thyroxine, while other tissues have thyroxine receptors within the nucleus. D) Different releasing hormones release thyroxine to different tissues.

Biology & Microbiology

The molecules of the mitochondrial electron transport chain are located:

A) in the stroma. B) in the mitochondrial matrix. C) in the intermembrane space. D) within in the inner membrane. E) in the cytoplasm.

Biology & Microbiology