Science Mysteries: Why Do People Yawn?

Science has given humans many amazing devices and useful bits of knowledge. We know so much about our bodies and how to stay healthy, 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 word from the text best describes scientists' understanding of the yawn? (5 points)

a
Mystery
b
Breath
c
Language
d
Message

Answers

Answer 1

Answer:

mystery

Explanation:

Throughout the passage, the author repeatedly refers to yawning as a mystery. For example, "One mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves." and "Scientists will continue to investigate the mystery of the yawn." and also, "while this behavior still is largely a mystery, one thing is certain:"


Related Questions

it is often said the media can make or break a person,especially,sports personalities. Explain how that happen ​

Answers

Answer:

there are "haters" on the internet that will do anything in their power to tear a person down and criticize them for their work no matter what it is.

but there are also many groups, let's say for example running. there are many running groups where you can have accountability partners and many other people that can relate to you and your journey and have the ability to support you throughout.

Table 2: Translation of mRNA molecules Codons tRNA Anticodons Amino Acids Number of Water Molecules Produced AUG (start)​

Answers

Answer:

The correct answer is -

tRNA Anticodons - UAC

Amino Acids- methionine

Number of Water Molecules Produced - none or 0

Explanation:

Translation of mRNA sequence is the process in which amino acids are produced by translating mRNA sequence with the help of ribosome, tRNA anticodons.

The translation of the amino acids starts with the starting code AUG that has tRNA anticodon complementary to mRNA sequence in themanner of adenine to uracil and uracil in thymine and guanine in cytosine.

If AUG mRNA codon presnt inthe starting it produced methinone amino acid with tRNA anticodon UCA and as it is the first amino acid so there is no water molecule produced.

Is sameness an effective or an humane way to protect the community in the novel the giver

Answers

Answer:

it is effective but humane depends on the society. To us it is not but to them it is normal.

Explanation:

Which story premise contains the most conflict?

Answers

Answer:

B stella loses her notes right before she has to give a presentation.

How many closing couplets are there in a Shakespearean sonnet?

Answers

Answer:

126 couplets sonnets

Explanation: That's all.

what is the main connotation of hard work in Marge Piercy's poem "to be of use"
A. struggle and exhaustion
B. dignity and gratification
C. simplicity and usefulness
D. exploitation and rebellion​

Answers

Answer:

B

Explanation:

Answer is B dignity and gratification

which statement from the equal pay bill letter is most clearly based on a stereotype
A. it is not the role of the government role to dictate to businesses what they should pay anyway, either as minimum wage or equal pay for men and women
B. if businesses are forced to pay women the same as male earnings, that means they will have to reduce the pay for men to employ, simple economics
C. they need to make enough to support their family and allow the mother to remain home and nourish for her kids.
D. it's a situation of well-meaning intentions, but negative unintended consequences

Answers

Answer: C. they need to make enough to support their family and allow the mother to remain home and nourish for her kids.

Explanation:

This really bites into the Man works, women stays home stereotype. The key words are "Mother remain home". In the way they say it, as in, that that is the way all family's operate and/or should operate- this is not true for many people, therefore it is stereotypical to a maximum.

✨ Please give points/ brainlest! ✨

Have a wonderful day!

‍♀️ Sophia

To be elected, how long must House members have been citizens of the United States?



at least four years

at least six years

at least two years

at least seven years

Answers

Answer:

They must be at least 7 years

At least 7 years!!!!

The complex houses married and single soldiers and their families

Answers

Answer: 'The complex' here means 'the building complex', and 'houses (verb)' means 'shelters (verb)' in the sense that 'single soldiers with their families and married soldiers with their families live in the residential quarters allotted to them in the complex'.

Explanation:

Sana maka tulong

pa follow back namnpo

Which of the following was NOT a way the majority of people died in ghettos?

A. Fights among residents
B. Disease or starvation
C. Gunshot wound
D. Deported to killing centers

Answers

Answer:

B. Disease or starvation

Write a story that ends with the expression so it pays to be kind to strangers

Answers

Answer:

There once was a poor man that walked by two small cottages one day; one red, and one blue. Both of the women that lived in either of the houses didn't have much money, since they had to give half of what they earned to the village president.

The woman in the red cottage, named Lucia, had a young son, and she very nearly starved, because she had small money to buy food, which she gave to her son. Lucia was boiling broth at the moment, and saw the poor man through her window. She didn't even check her satchel for some coins; instead she glanced at her thin stomach, and continued boiling broth; remembering to close the curtains.

Meanwhile, the woman in the blue cottage, named Moira, had no children, but a small dog that she fed diligently. Moira was sitting down on her wooden chair at the moment, with her dog on her lap. She heard a loud dragging noise coming from outside her door, and panicked. She wasn't sure if the village president was coming to collect his dues, or if it was one of those stray cats scratching at her door, so she opened the door timidly. There, she saw the poor man dragging his weather-beaten stick on the sand. Moira immediately took pity on him, and checked her satchel for coins. She found three bronze coins, not worth much, and ran outside bare-footed. Moira caught up to the man, grabbed his shriveled hand, and deposited the coins; giving him a quick smile before running back home.

Weak, but loud, the man yelled, "STOP, Moira."

Moira spun around, surprised. "How do you know my name?"

The poor man ignored the question, and came closer to Moira. He reached into his ragged pack, brought out 10 gold coins, and shoved them into Moira's hands. Moira gasped, only the president could have that much!

"Are you the village president in disguise?" Moira asked.

The supposedly poor man shook his head. "No, Moira. I was a stranger, supposedly poor, and you gave me more than half of your money. But your neighbor, Lucia, closed her curtains on me. You deserve this money more than I."

As the man walked away, he turned around one last time. "Say nothing about our encounter."

Moira nodded, awestruck, and pocketed the coins, now walking back to her house. When she closed the door to her blue house, she remembered that she forgot to say thank you.

"Alas!" She exclaimed. "Words will never say what he just did for me."

The moral of this story is that "It pays to be kind to strangers."

What is the best summary of this paragraph?

Answers

Sorry you’re gonna have to upload an image of the problem or type it out

Answer:

i see no paragraph this isnt a question that can be solved

Explanation:

I need help with a few homework, if you're willing to help PLEASE ANSWER

Answers

Answer:

what do you need help in though?

Answer:

What is the work? I am willing to help.

Explanation:

What tone should the speaker use to recite this poem?

confused and unsure
sincere and romantic
silly and humorous
angry and hurt

Answers

Answer:

can you mention the poem

What’s the poem? I can’t answer without it

. Write a letter to the Superintendent of Police about the malpractices of auto-rickshaw drivers plying in the city, requesting him to deal with them strictly to improve upon the traffic in the city.​

Answers

Answer:

Tôi đã trả lời vào phan word

Explanation:

Thắc mắc hỏi tôi nhé

6th grade ela help me please

Answers

Answer:

The poet uses a richly described flashback. I hope that helps! Good luck!

Eduardo wanted to learn how to cook, so he visited his friend Juan. Juan cooked while Eduardo watched and took careful notes.
Where is the best place to insert the clause "who had no experience in the kitchen"?
1. at the end of the first sentence
2. at the end of the second sentence
3. after "Eduardo" in the first sentence
04. after "cooked" in the second sentence

Answers

Answer:

The best place to insert "who had no experience in the kitchen" is:

3. After "Eduardo" in the first sentence.

Explanation:

The clause "who had no experience in the kitchen" has one purpose: to give more information about Eduardo. Therefore, the best place to put it is right when Eduardo is first mentioned, especially because that is the sentence which lets us know that Eduardo wants to learn how to cook. It makes sense that the two pieces of information should be given together: if he has no experience in the kitchen, nothing more natural than wanting to learn to cook.

Thus, the sentence becomes the following:

- Eduardo, who had no experience in the kitchen, wanted to learn how to cook, so he visited his friend Juan. Juan cooked while Eduardo watched and took careful notes.

the injera soaks up juices and flavors change in to passive form ​

Answers

Juices and flavors are soaked up by the injera

Identify whether sentences are written in active or passive voice.
1. The game had been won by the blue team. active or passive
2. The novel was written by a famous author. active or passive
3. The astronaut collected rock samples. active or passive
4. The art club has designed the program. active or passive
5. The blaze was extinguished by the firefighter. active or passive

Answers

Answer:

1 passive

2 passive

3 active

4 active

5 passive

Explanation:

pls help me out asap or i will fail im begging someone to help me with this

Answers

We can actually deduce here that the sentence uses imagery to illustrate that the old woman looked younger while feeding the birds.

What is imagery?

Imagery refers to the figurative language that uses words to create a mental picture in the minds of the readers. Imagery is used to appeal to the physical senses of the readers.

We see here using the words "weathered face" and "feeding from her outstretched gloved hands" creates mental picture of what is happening. Thus, it uses imagery.

Learn more about imagery on https://brainly.com/question/851653

#SPJ1

In which of the following types of sentences is the simple subject
usually left out?

Answers

Answer:

pls mention the following types so I can help u

The complement in the following sentence is what?
“Stephen can play the trumpet.”
A. Trumpet
B. The Trumpet
C. Stephen

Answers

Answer:

i think b

Explanation:

Answer:

I think it's A

hope this helps

have a good day :)

Explanation:

Désirée's acceptance of blame for the baby's skin color illustrates the theme of women's lack of economic independence women deferring to men women's responsibility for children skin color as a barometer of status​

Answers

Answer: women deferring to men

Explanation:

Désirée's acceptance of blame for the baby's skin color illustrates the theme of women deferring to men.

In the short story, Kate Chopin Désirée was adopted by a rich familiy in Louisiana. Later, Désirée married and they had a black baby. Since she didn't know her ancestral background, she accepted the blame for the color of the baby. This illustrated the theme of women deferring to men.

Which revision in a technical document would help make the document clearer and more concise?

A.
changing the sentences from active voice to passive voice
B.
using terms specific to the subject or industry
C.
substituting formal words with simpler ones
D.
including “to be” verbs wherever possible

Answers

Answer:

B

Explanation:

By using terms specific to the subject, the author shows a greater understanding of the topic and the audience will know what the author is trying to talk about.

Without using terms, you would sound like you dont quite know what youre writing about.

MARKING BRAINLIEST Write an original poem based on what you've learned in this unit. Your poem will be about a myth that you make up, using the Native American and Greek myths as inspiration.

Answers

Answer:

what people say about you is not true but you just have to take it like that

Anybody ?? i need help with this one bad and i put anything for right now pls can someone at least help me or give me the answer it will be a great thing

Answers

Answer:

The answer is the last option, "It helps readers understand how far away black holes are located." Hope this helped.

Explanation:

Answer:

its the third one

Explanation:

its perspectice is informal, so basically new phrases etc

The Loud House Center of Chaos

Answers

Answer:

Hahahaha

Explanation:

Answer:

Yes

Explanation:

huh

I'm bor.ed
What is spectroscopy?
Is anyone zindh??

Answers

Answer:

Hello There!!

Explanation:

It is a study of the absorption and emission of light and other radiation by matter and studying structures of atoms and molecules.

hope this helps,have a great day!!

~Pinky~

Answer:

Spectroscopy is the study of the absorption and emission of light and other radiation by matter. It involves the splitting of light

Zindh?

Write a letter to a friend describing any 3 occupation and which one you would like to take up when you grow up mention why you have selected the particular occupation

Answers

Answer:

Dear Susan,

I hope you are doing well. During the last few weeks, I've been thinking about the different occupations that I can take in the future.

The first one that came to my mind was a primary school teacher. I love being with kids. I find it interesting to explain things in creative ways so that they have fun while they learn.

The second occupation that I considered was graphic design. I am good at drawing and designing posters or presentations for the school. My classmates always ask me to help them with their Art homework when they are struggling, and the outcomes are always good.

Lastly, I thought of becoming an architect. I find it fascinating to design houses or buildings so that they look attractive and functional. On the other hand, it's hard to pay attention to every detail to have the perfect design.

After considering the three options, when I grow up, I would like to be a graphic designer since it is related to design like architecture, but I don't have to pay extra attention to details to have a successful design. Besides, I can work with children on projects and help others. What would you like to be when you grow up?

All the best,

Karl.

Explanation:

A letter to a friend should have an informal style. We can use contractions and expressions that are only correct to use when we know the reader.

In the first paragraph, we have to ask our friend how she is doing and introduce the letter's topic. Then in the following section, we have to describe the different occupations. In the last paragraph, we tell our friend which one we chose and why we chose it. Lastly, we ask our friend about her interests and say our goodbyes.

7.
Read the sentence and answer the question.

Neither light nor moisture is good for food preservation so most food products are packaged immediately after they are processed.

Which correctly shows where a comma is needed in the sentence?


A. Neither light nor moisture, is good for food preservation so most food products are packaged immediately after they are processed.


B. Neither light nor moisture is good for food preservation, so most food products are packaged immediately after they are processed.


C. Neither light nor moisture is good, for food preservation so most food products are packaged immediately after they are processed.


D. Neither light nor moisture is good for food preservation so most food products are packaged, immediately after they are processed.

Answers

Answer:

B. Neither light nor moisture is good for food preservation, so most food products are packaged immediately after they are processed.

Explanation:

Neither light nor moisture is good for food preservation, so most food products are packaged immediately after they are processed.

"B. Neither light nor moisture is good for food preservation, so most food products are packaged immediately after they are processed." Is the answer that you are looking for this is the only place that a comma could be without messing with the order of the sentence.

The answer for this question would be choice B) or the second option since if you say the other option sentences out loud and hear it, it doesn't sound right due to incorrect punctuation but option B) sounds correct and it has good punctuation and grammar.

Other Questions
Helpppppppp meeeee please ASAP Can someone help me identify what quadrilateral is this? the graph below have the same shape. what is the equation of the blue graph?Help me please Dynein feet Group of answer choices are found on microtubules in cilia and flagella and cause movement by grabbing and pulling at adjacent microtubule doublets. are knobs of carbohydrate that are essential to the movement of cilia and flagella. are present in cilia but not in flagella. are the anchoring proteins in basal bodies. For each of the following elements, write the chemical symbol, the atomic number, the atomic mass, the number of protons, and the number of neutrons. Dont forget to round the atomic mass to the nearest whole number. Plutonium Chromium Neon Gold Radon Tony is building a new silo to store corn as animal feed. It will be a cylinder topped with a half-sphere, and must store 21 000 t of corn. The entire silo can be filled with corn. Tony wants to minimize the surface area of the silo to reduce materials and paint costs. He has the following information: 1 cubic m of corn has a mass of 700 kg. Building costs are $8/m2, taxes included. Paint comes in 3.8 L cans. Each can covers 40 sq m and costs $35, taxes included. Corn costs $140 per tonne ($140/t), taxes included. What is the total cost to build, paint, and fill a silo with the least surface area? What is the mean, outlier & mean without outlier for 4; 4; 5; 6; 8; 9; 27 An economy is experiencing a high rate of inflation. The government wants to reduce consumption by $24 billion to reduce inflationary pressure. The MPC is 0.75. By how much should the government raise taxes to achieve its objective? Explain the practice of Feng Shui and why it is important to the Chinese. 1. How many molecules of S2 gas are in 756.2 L?a. 2.032 x 1025 molecules S,b. 3.022 x 1023 molecules S,c. 4.302 x 10 molecules Sd. 8.203 x 10' molecules S2 Which of these are examples of negative tropism? (Select all that apply.) A. Plant leaves and stems growing away from light due to phototropism.B. Plant roots growing away from a water source due to hydrotropism.C. Plant roots growing toward a water source due to hydrotropism.D. Plant roots growing toward the surface of the soil due to gravitropism.E. Plant leaves and stems growing toward light due to phototropism.F. Plant roots growing down into the dirt due to gravitropism.REMEMBER I HAVE TO CHOOSE MORE THAN ONE ANSWER. Write the following number by entering one digit in each box of the place value chart. Resistance depends on which three properties of a wire?Color and texture are not directly related to a wires resistance. 1. color, thickness, texture2. thickness, length, temperature3. length, texture, temperature4. temperature, color, texture what do we use in the blank the Sheep .... grazing what is the difference between the gist of a paper and the thesis of a paper? Help out omggggg !!!!!! A coin is flipped 60 times and lands on heads 36 times. Based on the experimental probability, how many heads would you predict for 200 flips of the coin? A fair six-sided die is thrown four times Find the probability, correct to three decimal places, of getting i) exactly one six occurs ii) at least one six occurs Read this text, which Rhonda is planning to use in an argumentative essay in favor of pet ownership.Many people dont know that owning a pet is actually good for your health, claims Dr. Ella Charmin, who has been a veterinarian for more than twenty years.What type of evidence is this?Select one:a quotea detaila facta reason how many moles are in 20 grams of argon