A medical class is hearing a lecture on vision. The doctor asks them what happens when the shape of the eye's lens changes, causing its elasticity to deteriorate. What condition is the doctor discussing?

Some researchers restrict the possibility of self-aware consciousness to species that ____

a. ?show strong individualism b. ?demonstrate cognitive complexity c. ?exhibit complex social behavior d. ?are at the top of the food chain

Neurons are to the nervous system what ____ are to the endocrine system.?

a. ?hormones b. ?glands c. ?target organs d. ?neurotransmitters