Category In detail

The Blood-brain Barrier (BHE), characteristics and function
In detail

The Blood-brain Barrier (BHE), characteristics and function

The Blood-brain Barrier (BHE) The blood-brain barrier (BHE) is a system of protection against the entry of foreign substances formed by endothelial cells that line the capillaries of the brain. Functions of the Blood-brain Barrier It is used to control and restrict the passage of toxic substances between blood circulation and cerebral fluid.

Read More
In detail

Land and village

Infographic vector created by freepikIf we could reduce the population of the Earth to a small village of exactly 100 inhabitants, maintaining the proportions currently existing, it would be something like this: There would be 57 Asians, 21 people from the American continent (including north and south) , 14 Europeans and 8 Africans 52 would be women 48 men 70 would not be white 30 would be white 70 non-Christians 30 Christians 89 heterosexuals 11 homosexuals 6 people would own 59% of the wealth of the entire village and 6 would be Americans Of the 100 people, 80 would live in subhuman conditions and 70 would be unable to read 50 would suffer from malnutrition 1 person would be about to die 1 baby would be about to be born Only 1 (yes, only 1) would have a college education In this village there would be 1 person with a computer
Read More
In detail

The gondola lift

Background vector created by freepik My friend Carmen and I are passionate about riddles and winter sports. The other day we went skiing and when I got on the cable car I came up with the following riddle: At the time I was sitting in cabin number 98, I crossed with chair number 105, while my friend Carmen who occupied cabin No. 241 crossed with No. 230.
Read More
In detail

The man with the hoe

The next riddle, very simple, is so stripped of mathematical difficulties that I hesitate to present it. However, like Edwin Markham's celebrated poem, I think it opens the way for interesting discussions. It seems that, in exchange for five dollars, Hobbs and Nobbs agreed to plant a potato field for the farmer Snobbs.
Read More
In detail

The coins

10 coins are placed on the table, until we have 3 rows of four coins, you have to change the position of only two of the coins until you get 5 rows of 4 coins each. Are you able to get it? Solution With this distribution we have the ten coins distributed so that we have 5 rows with 4 coins each:
Read More
In detail

The queen and her mother

In this drawing we can clearly see the queen's face with her crown. Can you find the queen's mother? Solution To locate it it is necessary to turn the image over and we will see it right away.
Read More
In detail

Turn the box into a chair

The image on the left shows a box made with four matches. Are you able to turn it into a chair by moving a single match? Solution The following image shows the solution.
Read More
In detail

Card counter

How many letters does this question have if we subtract those from your answer? Solution The statement has 56 letters. The correct answer would be Forty-three that has 13 letters and if we subtract them from 56 we have 43 left.
Read More
In detail

Fractal Geometry 2

A different vision, conception and interpretation of objects found in nature. Solution Benoît Mandelbrot was the main creator of Fractal Geometry. Fractal geometry is distinguished by a more abstract approach to the dimension that characterizes conventional geometry.
Read More
In detail

The cube through the cube

We have two identical solid cubes. Is it possible to make a hole in one of the cubes so that the other cube can pass through? Solution The solution involves making a hole slightly larger than the width of the cube by looking at it from one of its vertices, as shown in the image, so that the other cube can pass through it without problems.
Read More
In detail

Complete the board

How would you completely fill a 7 × 7 square board using the maximum possible number of type 1 pieces? Solution The following image illustrates the solution: You can find a more detailed solution on the solumate.blogspot.com.es page.
Read More
In detail

How many triangles can you count?

Look closely at the image on the left. How many different triangles of any size can you count? Solution There are 27 triangles in total, 16 of a square, 7 of four squares, 3 of nine squares and 1 triangle that occupies the 16 squares.
Read More
In detail

Woman face

Look for the face of the young woman who is hidden in this image. Solution The further you go, the better you can see her with her long hair and her smile.
Read More
In detail

Booba and Kiki

Look at the two figures that appear in the images. One of them is called Booba and the other is called Kiki. Could you tell me which is which? Solution This is a psychological experiment devised by Wolfgang Köhler in which the subject is asked to say which of these figures is called Booba and which Kiki. 95% of people assign the name Kiki to the orange angular figure and Booba to the violet rounded figure.
Read More
In detail

Eagle

In this image you can see the head of an eagle ... Solution But it is also a painted hand.
Read More
In detail

Flowers and profiles

In this image several profiles of people hide. Are you able to find them all? Solution There are 5 in total, two on the right side facing left, another two on the left side facing right and another in the lower central area facing left.
Read More
In detail

Owl

Look at this picture, what do you see? Solution Although it may not seem like it, it's a painted hand.
Read More