[Spock is preparing to enter the radiated warp core.]
Dr. McCoy: Are you out of your Vulcan mind? No human can tolerate the radiation that's in there!
Spock: As you are so fond of observing, doctor, I am not human.
McCoy: Are you out of your Vulcan mind?!
Saavik: You lied!
Spock: I exaggerated.
Answer: Lt. Marla McGivers was the crew member.