Base is used broadly in both literal and figurative contexts: the wide base of the pyramid; a party seeking to expand its power base. Basis is used in a nonphysical sense: Healthy scepticism is the basis of all accurate observation (Arthur Conan Doyle).
Omega-3 fats also lower blood pressure and heart rate, improve blood vessel function, and, at higher doses, lower triglycerides and may ease inflammation, which plays a role in the development of atherosclerosis. Several large trials have evaluated the effect of fish or fish oils on heart disease.
Close. Troponin and tropomyosin regulate contraction via calcium binding. Simplified schematic of actin backbones, shown as gray chains of actin molecules (balls), covered with smooth tropomyosin filaments. Troponin is shown in red (subunits not distinguished).Upon binding calcium, troponin moves tropomyosin away from the myosin-binding sites on actin (bottom), effectively unblocking it. Modified from Lehman et al.(1994).roponin and tropomyosin regulate contraction via calcium binding. Simplified schematic of actin backbones, shown as gray chains of actin molecules (balls), covered with smooth tropomyosin filaments.