1 – Wrong
Insulin helps to control the glucose content in the body.
2 – Wrong
Homeostasis also depends on the nervous system and not only hormones.
3 – Correct
Pancreas secretes the hormone insulin which helps to control the glucose content of the blood.
4 – Correct
Both the nervous and the hormonal systems play role in homeostasis
5 – Correct
The skin can help to control the body temperature because it has immense blood supply. Dilated vessels allow for heat loss while constricted vessels help to retain heat.
Since statements 3, 4 and 5 are correct, F is the answer.