The regulatory peptides synthesized by the gut include hormones, peptide neurotransmitters and growth factors. Indeed, several hormones and neurotransmitters first identified in the central nervous system and other endocrine organs have subsequently been found in endocrine cells and/or neurons of the gut.ubsequent to hormone binding, a signal is transduced to the interior of the cell, where second messengers and phosphorylated proteins generate appropriate metabolic responses. The main second messengers are cAMP, Ca 2+ , inositol triphosphate (IP 3), and diacylglycerol (DAG).
You are here. 20-Minute Total Body Rowing Workout. Pass by the crowd waiting for an elliptical and make a beeline for a rowing machine. Youâll burn up to 50 percent more calories while strengthening nearly all the muscles from your shoulders to your calves.
Rowing machines involve your whole body. Rowing machines target muscle groups in your back, shoulders and arms, but most models have sliding seats that allow you to develop your lower-body muscles as well.Rowing workouts can be strenuous, so talk to your doctor before using one especially if you have joint or lower-back problems.owing Movements. In general, rowing motions are mostly effective for muscle groups in your upper body. Specifically, pulling the handles toward your torso engages your lats and rhomboids as well as the biceps in your arms.