Directory Image
This website uses cookies to improve user experience. By using our website you consent to all cookies in accordance with our Privacy Policy.

Healthy Habits- Know the Biological Reasons

Author: Vnaya Education
by Vnaya Education
Posted: Jan 04, 2017
feel hungry

You Know Habits are hard to break right? That's why the sooner in life we build good, healthy habits, the easier

it is to keep them and stay as healthy as possible. And when good habits are in place,

it's easier to resist bad ones. In this article, you will study about the biological

reasons behind the habits that we all have.


Hunger is analyzed by three different components

  • Biological
  • Learned
  • Cognitive

Stomach Contraction Theory – This was given by Cannon and Washburn. It states that we are hungry when our stomach contracts.

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 fact that people whose stomachs were removed still felt hungry.

Glucose Theory – It states that we feel hungry when our blood glucose level is low.

Insulin Theory – It states that we feel hungry when our insulin level increases suddenly in our bodies.

This theory indicates that we have to increase our insulin level in order to feel hungry.

Heat Production Theory – It states that we feel hungry when our body temperature drops and when it rises hunger decreases.

This theory indicates that we eat more during winters.


As human beings, we cannot ignore psychological part, the learned and cognitive components of hunger. Hunger depends on the external time also. For eg. At 12 PM we feel hungry because it is lunch time. This is because of learned behavior. There are four basic tastes: sweet, sour, bitter and salty. People keep feeling hungry until these four tastes are satisfied.


Satiety is the absence of hunger. There are two mechanisms: at brain level and at gastrointestinal level.

At brain level: There are two places in the hypothalamus: gives Ventromedial nuclei and Lateral hypothalamus. Ventromedial Nivea signal when to stop eating. Lateral hypothalamus gives a signal to start eating.

At gastrointestinal level: Satiety signals come from stomach which controls short term eating.


Two Process Model of Sleep Regulation

The sleep-wake cycle is regulated by two separate biological mechanisms. It was proposed by Alexander Borbely. There are two processes:

  1. Circadian rhythm
  2. Sleep-wake homeostasis
Circadian rhythm –

A daily cycle of biological activity. It is also known as Process C. The regulation of body’s internal processes and alertness levels is governed by the internal biological or circadian clock.

Body’s built in circadian clock is centered in the hypothalamus in the brain. It is the main mechanism that controls the timing of sleep and is independent of the amount of preceding sleep or wakefulness. This internal clock is coordinated with day-night (light-dark cycle) over 24 hour period and regulate body’s sleep patterns.


Twenty minutes of light running is enough to increase the dopamine level. In high-intensity sports such as Freeletics, your brain starts to release dopamine just after a few minutes. This release makes you more alert, more focused and improves your concentration. The more you run, the more dopamine is released.

After running, the level of dopamine decreases while the level of serotonin increases. Serotonin is a hormonal antagonist to dopamine. It is involved in the regulation of sleep-wake cycle and body temperature. It controls appetite and lowers pain sensitivity. It is primarily known as a feel-good hormone because its release leads to a feeling of inner satisfaction.


It is necessary to detox the hormones to keep the body clean. The human body needs a balance of all three macronutrients – carbohydrates, proteins, and fats.


Fat is one of the most crucial elements for hormonal balance. Healthy fat is a raw material that we need to produce and maintain proper hormonal function.

Certain fats are required for rebuilding cells and stabilizing hormones. This is important for the female reproductive system.


Soaked or Sprouted nuts, Beans, Seeds, Fish


Antioxidant-rich vegetables – Broccoli, Spinach, Cabbage, Cucumbers

Healing spices and herbs – Cinnamon, Turmeric, Cumin, Garlic, Ginger

You will experience glowing skin, stable moods, fertility and consistent energy. Thus, all four habits play an important role in maintaining the health of a person.

Learn all about biology and the biology related topics with a biology tutor. From learning cell theory to studying evolution, fitting together all the aspects of biology, all this can tough to study all alone right? A biology tutor can help you put the biological puzzle together so you can excel in your exams. When searching for a biology tutor, look for someone who has extensive knowledge and expertise of the subject.

About the Author

Vnaya offers the finest online tutoring that not only transforms your child’s future but also helps you to learn your child abilities. You can learn any subject you want from our qualified tutors.Vnaya Online Education

Rate this Article
Leave a Comment
Author Thumbnail
I Agree:
Author: Vnaya Education

Vnaya Education

Member since: Jul 29, 2015
Published articles: 22

Related Articles