Answer:
As the thin filaments slide inward, structures called Z-discs come toward each other and the sarcomere shortens but the lengths of thick and thin filaments do not change. The sliding of the filaments and shortening of the sarcomere cause shortening of the whole muscle fiber and ultimately the entire muscle.
Answer and Explanation:
This is a model of an atom. Atoms are made up of three main parts: neutrons, protons, and electrons.
Neutrons are neutrally-charged subatomic particles, protons are positively-charged subatomic particles, and electrons are negatively-charged. Neutrons and protons are always located in the nucleus of the atom, which is basically the central location. Electrons, on the other hand, orbit all around this nucleus.
In the model, the protons and neutrons should be labelled in the center big golden ball, while the electron should be labelled on the small spheres "orbiting" this big center one. The electrons should also be labelled "negatively charged". Finally, the nucleus is positively charged because it's made up of protons (which are positive) and neutrons (which have no charge).
Answer:
Explanation:
This protein makes up part of the sarcomere and forms macromolecular filaments composed of multiple myosin subunits. Similar filament-forming myosin proteins were found in cardiac muscle, smooth muscle, and nonmuscle cells.
Atomic number is the number of protons of an atom. And, given that the atoms are electrically neutral and the charge of one proton is equal to the charge of one electron, the number of electrons is equal to the number of protons. So the neutral atom of sodium has 11 protons and 11 electrons. But, the sodium ion (Na+) has one positive charge, that means that it has lost one negative charge or one electron. Then, the sodium ion (Na+) has 11 - 1 = 10 electrons. <span>Then, the answer is that there are 10 electrons in a sodium ion.
hope this helps :3</span>