Types of muscle fiberstype Ⅰ
Think “1 slow red ox”
Oxidative phosphorylation(OP) sustained contraction
☆myoglobin rich
☆mitochondria rich (OP location)
high content of lipids (fatty acids are primary energy source for OP)
primary active transport・Na+, K+ATPase (or na+–K+ pump) in cell membranes transports Na+ from intracellular to extracellular fluid and K+ from extracellular to intracellular fluid.
・Ca2+ATPase (or Ca2+ pump) in the sarcoplasmic reticulum (SR) or cell membranes transports Ca2+ against an electrochemical gradient.
・☆H+, K+ATPase (or proton pump) in gastric parietal cells transports H+ into the lumen of the stomach against its electrochemical gradient. physiologyUWorld May 20, 2020, 11:46 PM HirotoShishido
intracellular calcium regulationryanodine receptors→ sense the initial calcium influx and triggers further release of Ca2+
Na+/Ca2+ exchanger(NCX)→ calcium efflux from the cytoplasm
which factors increase the rate of simple diffusion・Higher concentration gradients across the membrane
・Lower molecular weight
・Larger diffusion surface area
・Thinner membrane thickness physiologyUWorld May 1, 2020, 10:15 PM HirotoShishido
sweat gland innervationEccrine glands secrete a watery solution and are stimulated by direct sympathetic innervation.
