Teddy is afraid of needles and injections. whenever the nurse attempts to give him an injection, he screams and flails his arms and legs wildly. his heart rate increases, and he begins to sweat profusely, which indicates activation of the

sympathetic nervous system

Explanation:

The sympathetic nervous system is responsible for changes in the body in stress or emergency situations. This leaves the individual on alert, ready for fight and flight reactions.

Since Teddy is terrified of needles, taking a shot is a very stressful time for him, so when he finds himself facing a needle in the syringe, his sympathetic nervous system is activated and his body goes into a fight and flight state, so , he begins to have reactions such as shouting and shaking his arms and legs wildly. In addition his heart rate increases and he begins to sweat profusely.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: