Question

which of the following statements regarding gfr or glomerular filtration rate is true?
gfr increases as we age and is the highest in old age.
gfr is not related at all to kidney function.
a high gfr means the kidney is not functioning well.
a low gfr means that the kidney is not functioning well.

Explanation:

Glomerular filtration rate (GFR) is a measure of how well the kidneys are filtering. As people age, GFR typically decreases, not increases. GFR is directly related to kidney function. A high GFR may be due to factors like pregnancy in some cases but is not a sign of poor kidney function. However, a low GFR indicates that the kidneys are not filtering well, which is a sign of impaired kidney function.

Answer:

A low GFR means that the kidney is not functioning well.