This is when. The sequence of events that result in the contraction of an individual muscle fiber begins with a signal—the neurotransmitter, ACh—from the motor neuron innervating that fiber. The local membrane of the fiber will depolarize as positively charged sodium ions (Na+) enter, triggering an action potential that spreads to the rest of the membrane will depolarize, including the T-tubules. This triggers the release of calcium ions (Ca++) from storage in the sarcoplasmic reticulum (SR). The Ca++ then initiates contraction, which is sustained by ATP (Figure 1). As long as Ca++ ions remain in the sarcoplasm to bind to troponin, which keeps the actin-binding sites “unshielded,” and as long as ATP is available to drive the cross-bridge cycling and the pulling of actin strands by myosin, the muscle fiber will continue to shorten to an anatomical limit.
It would be electron because neutrinos have 0 charge, gamma rays have no charge associated with them, and alpha particles have positive charge.
When the codon is used for initiation, fMet is used instead of methionine, thereby forming the first amino acid as the peptide chain is synthesized.
I've checked all the options and I think that the right answer looks like this: M<span>ollusks</span> have highly developed olfactory receptors.
Fronds are basically the leaves of plants like ferns or palms. Hope this helps!!
