Quotes About Biology

The main neurotransmitters that are active in the adolescent brain are norepinephrine, dopamine, and serotonin.

A realization washed over her in that cold, dark space: this was how virtually all living things born on earth have died—with teeth tearing through their muscle and bones. We humans have computers and soap and houses but it doesn't change the fact that everything that walks is nothing but food for something else.

Somewhere, Charles Darwin nodded and smiled a knowing smile.

Now, here's the key thing you need to know about mitochondria: Like any other sort of engine, they generate energy, but they also generate waste. However, unlike your car engine, which turns gasoline into energy while creating smog, the mitochondria turn food into energy while creating something called free radicals.

Within every cell in your body is a posse of organelles (or miniature organs) called mitochondria

He also reviewed research showing that the energy fields of a healer's hands can change how fast cellular enzymes catalyze and, in red blood corpuscles, increase the content of hemoglobin, the compound that carries oxygen to our cells.

When those 810,000 cells that are being formed every second are birthed in an energy field of love and kindness, their gene expression is regulated by that field.

Royal blood isn't blue, it is a jaundiced shade of red and riddled with broken chromosomes

I think, therefore a single fertilized egg cell can replicate itself into trillions of specialized and exquisitely organized cells.

To have arrived on this earth as a product of a biological accident, only to depart through human arrogance, would be the ultimate irony.

Imagine someone holding forth on biology whose only knowledge of the subject is 'The Book of British Birds,' and you have a rough idea of what it feels like to read Richard Dawkins on theology.

Is it a manly game," he asked, for while men are ruled by their loins, those loins have two small brains each no larger than an olive and thus do not think well.

information molecule

Dying is nothing. You have to know how to disappear. Dying comes down to a biological chance and that is of no consequence. Disappearing is of a far higher order of necessity. You must not leave it to biology to decide when you will disappear. To disappear is to pass into an enigmatic state which is neither life nor death. Some animals know how to do this, as do savages, who withdraw while still alive, from the sight of their own people.

Every psychological explanation comes sooner or later to lean either on biology or on logic (or on sociology, but this in turn leads to the same alternatives).

The girl is so beautiful she seems almost to glow, more colorful than the landscape in which she sits. The dingy gray of the concrete overpass, the pebble brown of the tracks and the earth, the faded blue of her baggy jeans, the dirty white of her oversized T-shirt, the bleached arc of the sky, it all recedes behind her. Her presence is a vivd throb of color that deflates everything else around her. An accident of biology. A living miracle of splendor. It's a real problem.

La divergence entre l'Homme et les Chimpanzés, ou entre l'Homme et le couple Chimpanzé-Gorille, ne date que de 7 millions d'années environ

Le cerveau humain exige considérablement plus d'énergie : les 2 % de la masse corporelle que représente le cerveau consomment 20 % de toute l'énergie produite au repos.

Le développement de l'encéphale s'est surtout accéléré au cours des derniers 500 000 ans pour donner à Néandertal le plus gros cerveau qu'un hominine ait jamais possédé. Les 1 400 à 1 500 cm3 du cerveau de nombreux néandertaliens dépassent les 1 350 cm3 de la moyenne actuelle.

Le développement de l'agriculture est très récent à l'échelle de l'évolution humaine : moins de 10 000 ans, et souvent seulement 5 000 ou 6 000 ans, sont loin d'être suffisants pour une évolution biologique significative.

There is a common misconception that the human brain is the pinnacle of billions of years of evolution. This may be true if we think of the entire nervous system. However, the human neocortex itself is a relatively new structure and hasn't been around long enough to undergo much long-term evolutionary refinement.

Seriously, though, in this day and age I don't know why we're still cutting open frogs to see what's inside them. If somebody tells me there's a heart and intestines inside a frog, I'm willing to take their word for it.

Seriously, though, in this day and age I don't know why we're still cutting open frogs to see what's inside them. If somebody tells me there's a heart and intestines inside a grog, I'm willing to take their word for it.

The membrane surrounding the nucleus has large (for a fungus), tubelike extensions that create the endoplasmic reticulum