1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrej [43]
2 years ago
11

Science has given humans many amazing devices and useful bits of knowledge. We know so much about our bodies and how to stay hea

lthy, for example. We also know how to make machines and devices that make life easy for us. Scientists dedicate their lives to knowledge, but even with a lifetime commitment, sometimes scientists fail to find all the answers. One mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves.
Recent studies suggest that we yawn when we get tired as a way to encourage our brains. The theory is that yawning helps cool the brain, allowing it to work more efficiently. According to WebMD's article about these studies, when you yawn, your jaw muscles get stretched, increasing blood flow to your neck, face, and head. Also a deep breath during the yawn forces spinal fluid and blood down from the brain. The cool air then cools down these fluids.

Other scientists believe, however, that yawning is a form of communication. This theory attempts to explain why yawning seems to spread from person to person. This kind of behavior is called "contagious yawning" and carries with it a possible social message. Scientists are not yet sure what exactly the message is, but they believe people who have more social empathy are more likely to start yawning when they see someone else yawning.

Scientists will continue to investigate the mystery of the yawn. Is it a leftover behavior from before humans had language? Was it a "Hey, I'm sleepy. Let's go to sleep" message? Or is it really just a way to keep our brains cool? While this behavior still is largely a mystery, one thing is certain: you are probably fighting the urge to yawn right about now.

Which line from the text shows why scientists continue to study yawning?

One thing is certain: you are probably fighting the urge to yawn right about now.
Other scientists believe, however, that yawning is a form of communication.
One mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves.
The theory is that yawning helps cool the brain, allowing it to work more efficiently.
English
1 answer:
neonofarm [45]2 years ago
8 0

Research on humans tells us that people who are more empathetic tend to be more susceptible to contagious yawning. When you see someone else yawn, the networks in your brain responsible for empathy and social skills are activated. :)

You might be interested in
Please help! choose the sentence with the correct subject verb agreement
valentina_108 [34]
Okay, for the first one the anwser is D, for the second question the answer is B.
4 0
3 years ago
How does one get over stage frieght?
CaHeK987 [17]

Answer:

no

Explanation:

3 0
3 years ago
What does hamlet think of rosencrantz and guildenstern
xenn [34]
Here's an attachment with the answer key to all of your questions. 
Download doc
3 0
3 years ago
Which sentence has correct punctuation?
Rasek [7]

Answer:

The last one is correct punctuation.

4 0
3 years ago
Read the excerpt from "Sinners in the Hands of an Angry God."
Mamont248 [21]
Exquisite means elegant
6 0
2 years ago
Other questions:
  • Write a research-based argumentative essay for or against the importance of standing up to an injustice such as bullying.
    8·1 answer
  • Re-read the first three stanzas of the fly what comparisons is the speaker making between the fly and himself?
    10·2 answers
  • The writer's attitude toward the subject is called _____. figurative language metaphor tone simile
    7·1 answer
  • Read the sentence below:
    14·1 answer
  • Tomorrow is February 29th... LEAP DAY! It's almost like a whole extra day. If you could do ANYTHING you wanted to tomorrow what
    5·2 answers
  • How many body paragraphs in an essay?
    10·1 answer
  • PLZZZ ANSWER MY QUESTION!!
    7·1 answer
  • Question 3 of 8
    8·2 answers
  • How many licks does it take to get to the center on of lolly
    7·1 answer
  • Do you agree with Walter Cronkite? Should we "be very careful believing that what we think is right in America" is right for eve
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!