Answer:
Electrons are the negatively charged particles of an atom. Together, all of the electrons of an atom create a negative charge that balances the positive charge of the protons in the atomic nucleus. Electrons are extremely small compared to all of the other parts of the atom. The mass of an electron is almost 1,000 times smaller than the mass of a proton.
Explanation:
I hope this helped!
Eating regular meals establishes healthy eating habits, keeps you energized throughout the day, and can cause you to lose weight. regular eating habits establish healthy eating habits because it's always good to eat regularly. One of the biggest misconceptions to losing weight fast and in a healthy manner is by not eating, that is false. If you eat regular meals you can lose weight perfectly fine. The more calories you eat the more you lose, now i'm not saying eat a million and one candy bars, i'm saying if you eat food that is healthy can get you to lose weight. That also doesn't mean live off of carrots and strawberries for a week! You have to eat normally. So a peanut butter and jelly sandwich, pasta, rice or any kind of meat is the way to lose weight vs eating low calorie anything or a candy bar. Every type of food gives you energy! It all depends what it is too predict how much energy you'll receive or how long it will last. For instance, a candy bar will give you a lot of energy, fast but won't last as long as eating pasta or rice for energy. Eating regular meals does cause you to gain weight but thats a good thing, it gives you energy, muscle and can help you lose weight. Eating regular meals actually does the opposite of causing you to be hungry more often, it keeps you fuller for longer.
Diffusion because it requires no energy
Answer:
Leptin is a protein hormone composed of 167 amino acids of the cytosine family, it is synthesized mainly by white adipose tissue. The leptin receptor is related to that of receptors for cytosines (since it uses Janus or JAK type kinases and STAT-3 proteins as intracellular mediators of transcription pathway), it is predominantly found in the hypothalamus (particularly in the arcuate nucleus and to a lesser extent in the nuclei dorsomedial and ventromedial), hippocampus and cerebellum. There is evidence that leptin acts at the level of the arcuate nucleus, preventing the formation of NPY.
Explanation:
Leptin is produced exclusively in adipose tissue cells in a wide variety of species, including humans, and its concentration is higher in overweight than in lean individuals. The biological actions of leptin can be classified into two groups, those that are exerted in the tissues of the central nervous system, mainly the hypothalamus, and those that are carried out on the peripheral tissues. The former regulate body weight downward, decrease food intake, increase basal energy expenditure and modify some neuroendocrine functions such as reproduction, while the latter have effects on proliferation, differentiation and metabolism of peripheral tissues. The leptin that reaches the hypothalamus, in addition, inhibits protein synthesis and the secretion of neurons producing NPY / AgRP of the arcuate nucleus and stimulates the synthesis and secretion of those containing POMC. NPY (neuropeptide Y) is produced in the hypothalamic arcuate nucleus. This neurotransmitter arrives through the projections of the neurons of said nucleus to the paraventricular nucleus, which is the area where it is released. There are several studies that have shown that an increase in NPY leads to an increase in the sensation of hunger and thus to hyperphagia and obesity. Leptin acts at the level of the arcuate nucleus, preventing the formation of NPY. The leptin receptor lacks enzymatic activity in its intracellular domain. Instead, it is linked to members of the janus kinase family, which belong to a class of tyrosine kinases. The binding of the ligand activates the Jak kinase and leads to the phosphorylation of certain cytoplasmic proteins. Within these proteins there is a class of cytoplasmic transcription factors called signal transducers and activators of transcription (STAT).
