Some peptide/ protein hormones (angiotensin II, basic fibroblast growth factor -2, parathyroid hormone-related protein) also interact with intracellular receptors located in the cytoplasm or nucleus by an intracrine mechanism.eptide hormones are produced by many different organs and tissues, however, including the heart (atrial-natriuretic peptide (ANP) or atrial natriuretic factor (ANF)) and pancreas (glucagon, insulin and somatostatin), the gastrointestinal tract (cholecystokinin, gastrin), and adipose tissue stores (leptin).
Foot-and-Ankle Group. While your core muscles control ski-specific balance, your foot-and-ankle muscle group takes responsibility for the edging, pressure and rotational movements used in skiing. Your feet have intrinsic and extrinsic muscles.
1 Your musclesâthe gastrocnemius, quadriceps, hamstrings, glutes, abdominals, forearms, and deltoidsâget a workout. [ 2 sidebar]Your agility, hand-to-eye coordination, and balance will improve so that you'll feel more sure on your feet.  Rope jumping is also second to none for building strong bones.