Theory suggests that protoplanets began to form around the protosun from many collisions and combinations of gas and matter, .

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside