If you have the option of renewability it should be stated in your life insurance policy.
I believe most term life insurance plans are renewable.
To renew your term life insurance coverage review your life insurance policy and contact your life insurance agent or carrier for specific instructions.
You will want to let them know before your current term life policy expires so they can advise you of the cost for your new term life insurance plan and how long you may renew your coverage for, but many plans offer a 5 or 10 year renewal period.
Your renewal term life policy may not require proof of insurability, so you shouldn't have to take a physical exam, but your new premium will increase as it will be based on your age at renewal.
Learn more about renewable term life insurance policies