The kidneys are paired structures that
a. transport urine to the bladder
b. in digestion of carbohydrates
c. regulate salts, waters, and other minerals
d. absorb nutrients into the bloodstream

The correct answer is C.

The kidneys are paired structures that regulate salts, waters and other minerals.

The kidneys remove waste from the blood and regulate the amount of salts, water, and other minerals in the body. The ureter carries urine from the kidneys to the bladder.

a transport urine to the bladder and c. regulate salts, waters, and other minerals They are responsible for taking out extra fluids when we urinate.  It also controls the salt, potassium and acid content of the body. It also contributes to the production of red blood cells.

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.