Pltw Human Body Systems Semester Final |54 Questions| With Correct Answers.

Ion {Ans: An atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons}Peripheral nervous system {Ans: The part of the nervous system that is outside the central nervous system and comprises the cranial nerves excepting the optic nerve, the spinal nerves, and the autonomic nervous system.}Lobe {Ans: A division of a body organ (as the brain, lungs, or liver) marked off by a fissure on the surface}Distal {Ans: Situated away from the point of attachment or origin or a central point; located away from the center of the body}Neurotransmitter {Ans: A substance (as norepinephrine or acetylcholine) that transmits nerve impulses across a synapse.}Tibia {Ans: The inner and usually larger of the two bones of the leg between the knee and ankle that articulates above with the femur and below with the talus -- called also shinbone}