Marathon runners are encouraged to stop at water stations along the course to stay hydrated. However, occasionally a runner drinks too much water and suffers from hyponatremia, or "water intoxication". While water itself is not toxic, drinking too much can upset ion balance in the extracellular space.

Based on what you know about ions and nerve signaling, the levels of which important ion are most likely to be disrupted in hyponatremia?

A. hydrogen

B. potassium

C. calcium

D. sodium

E. oxygen

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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b because they naturally adapt to their environment plz mark brainliest

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.