Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Phospholipids are the main component of the cell membrane.
What is the main makeup of the cell membrane?

Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior.
What type of vertebrates control body temperature to just a limited extent from the outside by changing behavior?

The hypothalamus–pituitary complex is located in the body in the diencephalon of the brain.

Where is the hypothalamus–pituitary complex located in the body?