So it turns out that T three and T four hormones affect the different types of cells in our body in very similar ways. They essentially affect the basal metabolic rate, also known as the resting metabolic rate. So this concept basically incorporates all the different processes and reactions that take place in our body in our cells. For example, it affects cellular respiration, it affects protein synthesis, and so forth. So we see that an increased concentration of T three and T four hormones in our blood actually increases the rate of cellular respiration, increases the rate at which we produce our ATP by using oxygen. It also increases the rate of protein synthesis and protein degradation.