Beast Studio

Naturally, everyone in Academician Liu’s class was absent.

Students who can study for a doctorate at the Institute of Zoology, Chinese Academy of Sciences, have a thirst for knowledge that is beyond ordinary people.

I wish Academician Liu could instill all the knowledge in his head into them all at once, so that even if they couldn't digest it immediately, they would still enjoy listening to it.

Liu Wei is dressed like an ordinary student.

A bit younger in age.

However, long-term survival and experience in the wild gave his originally handsome face the air of a mature man.

So it seems that it is no different from the doctoral students sitting in the big classroom.

He found a seat in the back row by the aisle and sat down.

Academician Liu walked into the classroom with his thermos cup, took two sips, and placed it on the desk.

The assistant starts debugging the mobile teaching equipment.

After the debugging was completed, the assistant nodded to Academician Liu and sat in the first row near the door.

The classroom is kept very quiet.

It is completely different from the classroom for primary and secondary school students. Even if the class has not started yet, students have to lower their voices when discussing some issues. They are afraid of affecting other students. After all, who can sit in this classroom is better than others. , not much different!

Liu Wei suddenly felt out of place.

Academician Liu walked onto the stage, placed his right hand on the lid of the thermos cup, and hummed twice to moisten his throat.

The classroom suddenly entered an atmosphere of seeking knowledge.

Everyone's eyes turned to the podium.

Academician Liu smiled and said, "Students, the topic we are discussing today is the excitability of organisms. This topic is a common topic in animal physiology and is also the most basic feature. Before starting the formal class, I will show some videos to the students! "

Academician Liu stared at the computer on the podium and clicked play.

The projector projects video footage onto the wall around you.

The video being played was edited from the video recorded live by Liu Wei.

I have to say that Academician Liu’s assistant is a very good editing expert.

The theme of "excitability" was closely grasped, and a collection of excited videos of beasts in panic, fighting, mating, etc. was edited.

Liu Wei himself was so excited to see it.

Compared with other students in the classroom, their thinking is more inclined to the reaction of the animals behind the passionate video.

However, even the most rational person has to pay attention to the other protagonist in the video while watching the video, and that is Liu Wei.

The girl sitting next to Liu Wei wore retro round-framed eyes. She pushed up the glasses frame on the bridge of her nose, watched the video, and then tilted her head to look at Liu Wei.

It seems to be the same person!

She reached out and patted Liu Wei's arm. Liu Wei looked back at her and asked, "Classmate, is that you in the video?"

Liu Wei nodded, "Any questions?"

"No, no!" she waved.

Then the students on the left and right looked at Liu Wei, looking at the inconspicuous corner in the back row.

As more and more people look back.

This originally quiet classroom gradually became noisy.

Someone recognized Liu Wei sitting in the back row at a glance, "It's really him! I've seen his live broadcast!"

"There is a buddy in our dormitory who watches it every day and is fascinated by it!"

"It is said that he seems to be a student of Academician Liu, a representative of the younger generation of animal research practice in China!"

Academician Liu stood on the right side of the classroom, leaning against the window, and followed the students' gazes towards Liu Wei.

Liu Wei kept a smile on his face.

In his heart, he actually hoped that it was live broadcast now, so that he could preach more casually: "Basic practice, basic practice!"

But now I am in the class of a doctoral student at the Institute of Zoology, Chinese Academy of Sciences.

The atmosphere is completely different.

At least words such as "fuck, f*ck..." didn't appear in class.

The video is fifteen minutes in total.

After finishing.

Academician Liu walked up to the podium, turned off the video, and said with a smile: "While watching the video, the students' eyes were all looking to the back. You should have discovered that the person who was having sex with the wild woman in the video was none other than my student Liu Wei. Now Just sit in the right corner.

Before coming to class today, I decided on the topic of discussion in class. Biostimulability covers a wide and deep content.

Broadly understood, when the body is stimulated by changes in the surrounding environment, it has the ability to respond, which we call excitability.

Environmental changes that can cause the body or its tissue cells to react are called stimuli. Stimulation causes metabolic changes and activity changes in the body or its tissue cells, which is called a reaction.

The reaction forms can be divided into two types: one is from relative static to active state, or the activity changes from weak to strong, which is called excitement.

The other is a change from activity to a relatively static state, or from strong to weak activity, which is called inhibition.

Whether the response caused by a stimulus is excitement or inhibition depends on the quality and quantity of the stimulus and the functional state of the body at that time.

In the video just played, the excitement generated by the beast changed from a relatively static state to an active state. Then Liu Wei used his experience and professional knowledge to try to change the cognitive environment of the beast, and then changed the active state into a relatively static state. , this is suppression.

We can see that before and after contact, the quality and quantity of stimulation are balanced, and the body, the beast in the video, switches between the two states.

This is the general operating principle. Before going into the in-depth discussion, I would like to ask Liu Wei to come up and share with you his understanding of biological excitability!"

Academician Liu took the initiative and clapped his hands twice.

The students also clapped.

Liu Wei took a breath, looked for the state of the live broadcast, lifted his spirits, and thought about it, he was actually not that nervous. He could just treat it as a live broadcast.

He walked onto the stage and said with a smile: "Hello fellow brothers and sisters, I am honored to attend Teacher Liu's discussion class today.

Relatively speaking, my academic research direction is different from yours. It is biased towards biological evolution, while your academic research is biased towards applied science. "

Looking back at the topic on the screen, he said: "Teacher Liu just explained excitability in a broad sense. Now I will take you to understand it in a narrow sense. Excitability refers to the ability or ability of excitable tissues or cells to react when stimulated. characteristic.

Excitable tissue refers to a tissue (or cell) that can generate action potentials after being stimulated. It usually refers to nerves, muscles, and gland cells.

In fact, almost all living tissues or cells have the ability to respond to external stimuli to some extent, but the sensitivity and the form of response are different.

In various animal tissues, generally among nerve cells, muscle cells and gland cells show higher excitability. In the video just now, the crocodile’s aggression towards me is mainly due to the excitability shown by muscle cells. Usually We call this an instinctive reaction in animals.

The mating behavior of elephants in the video is the excitability of glandular cells.

In addition, cardiomyocytes are as excitable as nerve cells, and their periodic changes in excitability are similar to those of nerve cells.

When cardiomyocytes are stimulated to produce an excitation, the excitability also undergoes a series of periodic changes. These changes are closely related to changes in membrane potential and channel functional status.

…”

Liu Wei was eloquent and couldn't stop at all.