5. Which of the following is an example of active transport?
O
chromosomes migrating during cell division
O
water diffusion throughout the cytoplasm of a cell
O
cilia moving rapidly to propel a single-celled organism through water
proteins moving ions frun low to high concentration across a cell membrane

D (proteins moving ions from low to high concentration across a cell membrane)

Explanation:

Active transport, by definition, is a type of substance transport that requires energy (typically in the form of ATP). Having said that, we can immediately eliminate B (aka water diffusion throughout the cytoplasm of a cell), as diffusion (osmosis in this case) does not require any expenditure/spending of energy. Next, we can cancel A and C because although they do require energy, there is no transport involved. Thus that leaves us with D. D is not only the answer because of the process of elimination but also b/c the ans. choice says that ions are being moved from low to high concentration, which is against the concentration gradient and thus requires energy. Hope you found this helpful! :)

Which of the following is an example of active transport?

Cilia moving rapidly to propel a single-celled organism through water  proteins moving ions from low to high concentration across a cell membrane

Explanation:

Active transport involves movement of ions from a region of low concentration across a cell membrane to a region of high concentration

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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i think the answer is g1

hope i

-lavira: )