Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_69 ( resting_potential__mv_ VARCHAR, ap_duration__ms_ VARCHAR, cell_type VARCHAR )

### Question ###
What was the resting potential with an AP duration of 1.0 and a median giant fiber cell type?

### Accurate SQL ###

SELECT resting_potential__mv_ FROM table_name_69 WHERE ap_duration__ms_ = "1.0" AND cell_type = "median giant fiber"