The body has very efficient internal defenses which can remove any quantity of an unwanted substance.
a. true
b. false

The pituitary gland is controlled by sex hormones true or false.

Social sciences are the observable facts or events that involve human society. select the best answer from the choices provided t f

Which statement describes the u.s organ donation system? a. about 200 lives are saved per year b. transplant recipients must pay for organs c. the waiting lists for organs are very long d. it is mandatory