Biological effects on hunger and satiation

Hunger Motivation Most of us love food. In fact, I can truthfully say that I think about food probably more than I have thought about anything in my whole life. Everyday, even when teaching, I think about what I am going to eat for my next meal or snack. If I am in a Vegan phase, I think about nuts, pasta and fruits.

Biological effects on hunger and satiation

By Takako Hara spring Hungry? The question "why do we feel hungry? It is because we need to get nutrients to survive.

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Hunger is the motivation for us to be able to know that we need to get the nutrients in our body. But how do we really know that we are hungry? The answer can be analyzed by three different components: Hunger and Eating Based on Biology Many theories of hunger are historically discussed from the biological component.

Cannon and Washburn as cited in Coon, came up with the stomach contraction theory which states that we know we are hungry when our stomach contracts. In the notorious balloon study, Washburn trained himself to swallow a balloon which was attached to a tube, then the balloon was inflated inside of his stomach.

When the balloon was inflated, he did not feel hungry. Later this theory was opposed by the fact that people whose stomach was removed still felt hungry. Glucose theory states that we feel hungry when our blood glucose level is low. Bash as cited in Franken, conducted an experiment transfusing blood from a satiated dog to a starved dog.

The transfusion resulted in termination of stomach contraction in the starved dog, and supported the glucose theory.

But as LeMagnen as cited in Kalat, suggests that blood glucose level does not change much under normal conditions. However, this theory seems to indicate that we have to eat to increase our insulin level in order to feel hungry. Fatty acid theory states that our bodies have receptors that detect an increase in the level of fatty acid.

Activation of the receptor for fatty acid triggers hunger Dole,Klein et al. Heat-Production theory suggested by Brobeck as cited in Franken, states that we feel hungry when our body temperature drops, and when it rises, the hunger decreases.

This might be explain that we tend to eat more during winter. Hunger and Eating Based on Learning Hunger cannot truly be explained only by the biological component. As human beings, we cannot ignore our psychological part, the learned and cognitive components of hunger.

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Unlike any other beings, we humans use an external clock in our daily routine, including when to sleep and when to eat. This external time triggers our hunger.

For instance, when the clock says 12 pm, lunch time, many people feel hungry just because it is lunch time. This hunger is triggered by learned behavior.

Eating Behaviour -

In addition, the smell, taste, or texture of food also triggers hunger. For instance, if you like french fries, the smell of frying potatoes may trigger your hunger. However, this preference of taste, smell, or texture is a culturally learned preference.

If one does not like sushi, the smell of sushi does not trigger hunger. Interestingly, people also feel hungry for a particular taste, more specifically, the four basic tastes: For example, an often heard expression is "I am hungry for something sweet. Hunger and Eating Based on Cognition Colors also contribute to hunger.

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Looking at a yellow banana makes one to want to eat it, but a red banana does not. Similarly, red or green can trigger hunger for an apple, but not blue. It is hard to find natural food with blue color, because mother nature does not produce blue food.

Blue is said to be an appetite suppressant.

Biological effects on hunger and satiation

Color greatly affects our hunger. Many people eat foods base on their knowledge of what foods are good for them. For example, low fat, low sugar, and low sodium food are said to be good.

Eventually people learn to change their preference and want to eat "good food" only Franken, Satiety The mechanism of hunger and satiety are not necessarily the same.Prediabetes and type 2 diabetes are caused by a drop in insulin sensitivity blamed on “intramyocellular lipid,” the buildup of fat inside our muscle cells.

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Biological effects on hunger and satiation

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Doctor's Note. This video is part of an experiment to find ways to appeal to those new to the site. So much of what I do is targeted towards those who already know the basics, but in the user survey about a thousand of you filled out a few weeks ago, many of you asked for me to take a step back, and do some videos targeted more towards those new to evidence-based nutrition.

The mechanism of release and effects on appetite will be discussed, as well as effects on the motility of the gastrointestinal tract. Bariatric surgery (gastric bypass) will be used as a model to explore the potential effects of alterations in the release of gut peptides on satiation, satiety and hunger within the scope of the Satiety Cascade.

The one-stop fitness resource. Everything you need to know about living longer, burning fat and building muscle: realistically, naturally, and in the shortest amount of time. In efficient appetite control, hunger, satiation, and satiety occur in succession and allow the adjustment of energy intake to energy needs.

The present epidemic of obesity shows that many things can go wrong in appetite control when powerful and ubiquitous stimulatory influences override inhibitory mechanisms.

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