Of the following muscle types, which has the longest muscle cells and has obvious stripes called striations? Of the following mu
scle types, which has the longest muscle cells and has obvious stripes called striations? cardiac muscle visceral smooth muscle multiunit smooth muscle skeletal muscle
Skeletal muscle is made up of elongated muscle fibers or myocytes, also called skeletal striated muscle cells (in short striations), along with connective tissue and blood vessels. Muscle cells associate with each other to form muscle fascicles, and these in turn join to form skeletal muscle, primarily responsible for the mobility of organisms.
A testable question is something you need data for, ex: if i bounce a bouncy ball from larger heights, how high will it fly? it can't be just a regular yes or no question
Brief sequential change in the membrane potential of excitable cells after stimulus is called action potential whereas membrane potential represent charge difference across the membrane
In a typical neuron cell, membrane potential of cytoplasm is negative at rest and hence called resting membrane potential
Resting membrane potential of excitable cells is established by Na+ K+ pump and maintained by K+ leaky channels at rest
Phases of action potential includes: depolarization, repolarization, hyperpolarization and resting membrane potential
Depolarization starts when a threshold stimulus is applied on a neuron when via Na+ mechanically operated channels that trigger action potential
Depolarization of membrane potential is due to influx of Na+ via voltage gated Na+ channels
Repolarization starts with the efflux of K+ by the opening of voltage gated K+ channels, voltage gated K+ channels starts to open when voltage gated Na+ channels becomes inactive
Hyperpolarization occurs due to excessive efflux of K+ by voltage gated K+ channels
Additional efflux of K+ occurs due to slow inactivation of voltage gated K+ channel
