During normal breathing, what is the usual stimulus for a person to take a breath?

a. a decrease in pH of the cerebrospinal fluid

b. stimulation by norepinephrine

c. PCO2 in the blood drops below 40 mmHg

d. PO2 in the blood drops below 100 mmHg

Answers

Answer 1

Answer:

a

Explanation:


Related Questions

Help me please! Help​

Answers

Answer:

football field

Explanation:

Which of the following statements about the population in this graph is true?

It is increasing slowly.

It is increasing rapidly.

Answers

Answer:

It is increasing rapidly.

here is your answer

don't forget to give some hearts

Explanation:

The statement which is true about the population in this graph is that it is increasing rapidly. Thus, the correct option for this question is B.

What is a Population?

A population may be defined as a group of individuals belonging to the same species living in the same area at a definite time. The size, density, birth rate, death rate, and abundance, are some characteristics of a population. These characteristics of the population are known as demographic factors.

According to the context of this question, the axis of the graph is increasing very rapidly. It determines the rate of population towards rapid growth. The growth of any population depends on various factors such as space, food, resources, mating partners, availability, etc.

Therefore, the statement which is true about the population in this graph is that it is increasing rapidly. Thus, the correct option for this question is B.

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Identify the structures of the heart.
label A
Label B
Label C
Label D
Label E
Label F

Answers

Answer:

A. Pulmonary value

B. Tricuspid value

C. Septum

D. Bicuspid value

E. Aortic value

F. Aorta

I need help please :(

Answers

Answer:

D. Cellular respiration is a process that producess glucose

Explanation:

Glucose is a reactant used in cellular respiration and NOT a product of it. Cellular respiration burns glucose and turns into ATP (energy)

Incinerating or burning trash is the best way to get rid of the majority of it. True or False

Answers

Answer:

Emissions from burning waste worsen environmental inequalities, create ... and municipal solid waste incinerators have sparked resistance in many places. ... Nonetheless, 72 incinerators are still operating today in the U.S. Most of ... Wastes that are not recycled or composted typically are either burned or ... So false

Explanation:

If a 25 kg car accelerates at a speed of 100m/s2,2 what will the force of the car be? Plug in the numbers: Force = mass x acceleration

Answers

Here is the answer:
Mass=25kg
Acceleration=100m/s^2
Force=mass*acceleration
Force=25*100
Force=2500N

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What does this table show?

Answers

Answer:

doesn't it just show metals and non metals and their atomic number and mass number?

Explanation:

Guys need your help!!! True or False???

If you have a reoccurring flu virus, your body’s memory B cells can help fight off the same virus.

Why is it T or F. Do not just restate statement.

Thanks!

Answers

Answer:

True, your body will develop antibodies against it

Explanation:

brainliest pls?

Describe the added “costs” of sexual reproduction for an organism.

Answers

O_o

huh

-_0

Photosynthesis???????

I will give brainlies if you answer correctly and give an explanation!

Regular periods of overeating followed by self-induced vomiting are associated with which physiological disorder?
A. Anorexia
B. Bulimia
C. Obesity
D. Parkinson's

Answers

Answer:

B. Bulimia

Explanation:

See below for a description of each case:

Anorexia (also known as Anorexia nervosa) is an eating disorder characterized by abnormally low body weight. It's similar to the starving of oneself to achieve lower weight, but this is unhealthy. It's very common (more than 3 million cases per year in US) and is treatable. This can last for several months or years and is more common in females from ages 18–35.

Some symptoms include:

Extreme weight loss

Thin appearance  

Fatigue and insomnia  

Bluish discoloration of the fingers

Hair that thins, breaks or falls out  

Amenorrhea (absence of menstruation)  

Dry or yellowish skin  

Dehydration

Bulimia (also known as Bulimia nervosa) is an eating disorder characterized by binge eating, followed by methods to avoid weight gain (ie. vomiting). It's very common (more than 3 million cases per year in US) and is treatable.  It can last several years or be lifelong and are more common in females from ages 18–35.

Some symptoms include:

Binge eating

Forceful vomiting

Long-term fear of gaining weight  

Overuse of laxatives or diuretics

Use of supplements or herbs for weight loss

Excessive exercises

Stained teeth (from stomach acid)

Obesity is a condition characterized by abnormal or excessive fat accumulation. It's extremely common (more than 3 million cases per year in US) but is treatable. It can last several years or be lifelong. Family history may increase likelihood for some types.

Some symptoms include:

Above average body weight  

Sleep apnea- a condition in which breathing is irregular and periodically stops during sleep  

Skin problems caused by moisture that accumulates in the folds of your skin  

Osteoarthritis in weight-bearing joints, especially the knees

Parkinson's disease is a chronic and progressive movement disorder, meaning it weakens the control of movements of the body over time. It's fairly common (more than 200,000 cases per year in US). There are treatments to manage the condition but there is no known cure. This can last several years or be lifelong. It's more common in 60+ years old males.

Some symptoms include:

Tremors, trembling of hands, arms, legs, jaw and face

Stiffness of the arms, legs and trunk

Slowness of movement

Poor balance and coordination

Speech difficulty

What do tornadoes and hurricanes have in common

Answers

☁️ Answer ☁️

"Tornadoes and hurricanes appear to be similar in their general structure. Both are characterized by extremely strong horizontal winds swirling around the center, strong upward motion dominating the circulation with some downward motion in the center. "

1. Death

2. strong horizontal winds swirling around the center

3strong upward motion dominating the circulation with some downward motion in the center.

Hope it helps.

Have a nice day noona/hyung.

Please answer correctly. I really need this. Its not a joke.
Thank you
1. What conditions might cause the most water and sediment to be collected at the bottom of the stream table?

Answers

Answer: Steep, high velocity, no silting. The high water speed picks up silt from the bottom instead of letting it settle to the bottom. When the land gets level like often happens at the mouth of rivers where the water spreads out and slows down, silt settles to the bottom and you could get a wide, shallow delta.

(Put in own words this is from online hope it helps)

How could you use the treated wastewater to recharge the aquifer?

Answers

Answer:

QUESTION:

How could you use the treated wastewater to recharge the aquifer?

ANSWER:

Treated wastewater could be used to recharge the local aquifer by discharging the treated water into an area with permeable sediments that overlies the aquifer. The treated wastewater would flow through the permeable sediments and into the aquifer, from which it could be pumped again for use in homes and businesses.

Explanation:

I hope that this helps you out! :)    

Have a great rest of your day/night!    

Please thank me on my profile if this answer has helped you out.

(10 points)
The diagrams below show some changes in an
environment over time.
(A)
(B)
(C)
Which phrase best describes this sequence of
diagrams?
(1) the path of energy through a food web in a
natural community
(2) the altering of an ecosystem by a natural
disaster
(3) natural communities replacing each other in
an orderly sequence
(4) similarities between an aquatic ecosystem
and a terrestrial ecosystem
(D)
r

Answers

Answer:

The correct answer is - (3) natural communities replacing each other in an orderly sequence

Explanation:

In this diagram, there is ecological succession occurred, the process of the new natural community over the older natural community in an orderly sequences.

In this case, there are change from an aquatic ecosystem to new land ecosystem by changing various biotc and abiotic factors. The ecosystem go through various changes and physical changes.


factors necessary for germination of seed..
pls answer and hiii​

Answers

All seeds need water, oxygen, and proper temperature in order to germinate. Some seeds require proper light also. Some germinate better in full light while others require darkness to germinate. When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat.

What are all of the secondary consumers included in this web?Herring


Sprat


Gray seal


Saduria entomon


Monoporeia affinis

Answers

Answer: Herring and Gray Seal.

Why? Without the image it’s hard to really tell without the picture of the web, however, it seems to me that the sprat would eat the Saduria thing and the Monporeia and the Seal and herring would eat the Sprat making them the secondary consumers.

Hope this helps

Which is NOT needed to complete photosynthesis?
A. water

B. oxygen

C. sunlight

D. carbon dioxide

Answers

It is oxygen. Hope this helps

What types of light can plant cells absorb? Select 3 answers to get this correct.

Answers

It will be 1,2,4

You can’t see x-rays with machine

Following fertilization and two rounds of cell cleavage, each of the four cells of a frog embryo has a centriole that is preparing for the next cleavage. The centriole in each of these cells can trace its origins back to the original centriole provided by the _______ prior to the first cleavage. Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices secondary oocyte sperm ootid oogonium primary oocyte

Answers

Answer:

sperm

Explanation:

Centrioles are cylindrical organelles that play a major role during cell division, where they work to form the centrosome which duplicates and moves to opposite ends of the cell. The proximal centriole provided by the sperm cell mediates the separation of chromatids during the first cleavage of the fertilized egg. Upon fertilization, the proximal centriole forms the aster rays where microtubules act as a guide for the migration of the female pronucleus.

explain why the gametophyte plants live in moist habitats​

Answers

Answer: Unlike the vascular sporophytes, the gametophytes have no vascular tissue at all. These gametophytes are therefore very small, and develop best in moist areas, where they can absorb water directly from their surroundings. Like the bryophytes, ferns and fern allies are still restricted to moist habitats.

Explanation:

Innate immunity and acquired immunity are both _____. See Concept 43.1 (Page 953) View Available Hint(s) Innate immunity and acquired immunity are both _____. See Concept 43.1 (Page 953) dependent on surface secretions from sebaceous and sweat glands, which give the skin an acidic pH that is unfavorable for bacterial colonization based on the trapping of microbes by mucus dependent exclusively on cell-mediated responses characteristics of all vertebrate animals dependent on tears, saliva, and mucous secretions that contain lysozyme, an enzyme that digests bacterial cell walls

Answers

Answer:

The correct answer is - characteristics of all vertebrate animals.

Explanation:

Innate immunity is the first line of the immune system that comes with birth whereas adaptive or acquired immunity is the immunity that comes throughout life by experiencing or developing the immune system. Adaptive or acquired immunity is the immune response that comes through cell-mediated responses whereas innate immunity is the immune response that includes sweat glands and secretion from the skin. innate immune responses also include digesting and killing bacteria by the saliva, enzymes, lysozymes.

The only characteristic among these that present in both is that they both immune systems found in all vertebrates.

During summer in the Northern Hemisphere,


A. the Sun rises in the Southeast and sets in the Southwest.

B. the Sun appears lower in the sky than during other seasons.

C. there are fewer hours of visible sunlight each day than during other seasons.

D. the Sun rises earlier and sets later than during other seasons.

Answers

Answer:

B the sun appears lower in the sky

Natural selection leads to adaptations to __________ in an organism's environment. View Available Hint(s) Hint 1.opened hint Consider the features of the environment that affect organisms' existence. Natural selection leads to adaptations to __________ in an organism's environment. nonliving factors such as temperature and chemicals other living organisms abiotic and biotic factors water for aquatic organisms and the atmosphere for terrestrial organisms

Answers

Answer:

abiotic and biotic factors

Explanation:

According to the evolutionary theory proposed by Darwin, natural selection can be defined as the mechanism by which evolution occurs (i.e., the mechanism by which species change over time). An organism´s environment is comprised of abiotic (e.g., temperature, light, water, etc) and biotic (e.g., microbes, food availability, etc) factors. Adaptations refer to the phenotypic traits that increase the chance of survival and reproduction of an organism in its environment. Organisms better adapted to their environment are selected by natural selection to reproduce and thus perpetuate their genes across generations.

How does global warming affect the oceans?

Answers

Answer:

The ocean absorbs most of the excess heat from greenhouse gas emissions, leading to rising ocean temperatures. Increasing ocean temperatures affect marine species and ecosystems. Rising temperatures cause coral bleaching and the loss of breeding grounds for marine fishes and mammals.

Explanation:

Explanation:

please remember to write it in your own words

What type of muscle tissue is this

Answers

Answer:

It is skeletal muscle tissue also if you see my comment spread the word.

Explanation:

describe how a non-resistant Staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin

Answers

Explanation:

characteristics of enzymes

S. aureus can develop resistance to methicillin and other -lactam antibiotics by expressing a foreign PBP, PBP2a, which is resistant to methicillin but can perform the functions of the host PBPs.

What is Staphylococcus aureus?

Staphylococcus aureus is a Gram-positive round-shaped bacterium that pertains to the Bacillota and is a popular member of the body's microbiota, commonly found in the upper respiratory tract and on the skin.

S. aureus can develop resistance to methicillin and other -lactam antibiotics by expressing a foreign PBP, PBP2a, which is resistant to methicillin but can perform the functions of the host PBPs.

Thus, in this way a non-resistant Staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin.

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I was thinking B but I need another opinion.


NO LINKS AND IF YOU DO YOU WILL GET REPORTED​

Answers

Answer:

YES YOU WERE RIGHT B MAKES SENSE

Explanation:

Answer:

B) 1 and 2

Explanation:

Both 1 and 2 are true in the actual Solar System. Number 3 is incorrect because Earth is only tilted at a 23.5 degree angle. Number 4 would make a oval or other shaped orbit, so it's incorrect.

Hope it helps!!!

What is one disadvantage of desalination?

The process can ultilize solar energy to lower its cost.
The process uses fuel that is expensive.
The process makes water that is unsafe to drink.
The process is too difficult to carry out in big cities.

Answers

Answer:

B

Explanation:

Desalination remains expensive, as it requires enormous amounts of energy. The correct answer is b) The process uses fuel that is expensive.

What is desalination?

Saline water which is typically sea water, is artificially transformed into fresh water through a process called desalination. Reverse osmosis and distillation are the two most used desalination techniques. There are several approaches. Although each has benefits and drawbacks, they are all useful.

The issue is that it takes a lot of energy to desalinate water. When salt is dissolved in water, it forms strong chemical bonds that are challenging to break. Desalinating water may be rather expensive since both the energy and the technology required are costly.

Desalination turns seawater into freshwater by removing the salt, however, it also has certain unfavorable effects on the ecosystem. Desalination facilities release trash and poisonous chemicals that are bad for the environment and animals. The procedure can also increase the salinity of saltwater, which has an impact on fish.

Therefore, the correct answer is b).

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An extra chromosome is known as a trisomy and one less chromosome is known as a monosomy. Why are these good words for a disorder with extra or missing chromosomes (look at the root words)?​

Answers

Answer:

prefix meaning for "mono" means "one and "tri" means three

These are good words for a disorder missing a chromosome (mono) or having an extra (tri) since it is litterally telling you it either has 3 or 1 chromosome

What fictional planet does the writer compare Kepler-16b to?
Pluto
Lyra
Tatooine
Cygnus

Answers

Answer:

Tatooine

Hope this helps!

Other Questions
Does anyone know this describe how net profit of a business is calculated? Vince is saving for a new mobile phone. The least expensive model Vince likes costs $225.90. Vince has saved $122.35. He used this solution to determine how much more he needs to save.225.90 less-than-or-equal-to 122.35 + a. 225.90 minus 122.35 less-than-or-equal-to 122.35 minus 122.35 + a. 103.55 less-than-or-equal-to a.Vince says that based on the solution, he should save a maximum of $103.55.Is Vince correct?Vince is correct because he found the correct solution to the inequality.Vince is correct because he should save at least $103.55.Vince is not correct because he wrote the wrong inequality to represent the situation.Vince is not correct because he should have interpreted the solution as having to save a minimum of $103.55. La semana pasada, yo ________ cmo llegar a las cascadas. saban sabas supe supiste Explain why self -confidence could help you secceed in your studies In Tom Sawyer chapter 18, why was tom feeling like the "guiltiest of villains" when Aunt Polly hugged him? please help me on this problem! CAN SOMEONE PLEASE HELP ME PLEASE The real interest rate earned is the Group of answer choices same as the nominal interest rate when inflation is moderate cost of borrowing in current consumer prices cost of borrowing in current producer prices cost of borrowing adjust for the rate of change in the price level nominal interest rate adjusted for the growth rate of the economy In order for geothermal energy to be produced efficiently, the geology of the area needs high subsurface _______A. Depth B. Pressure C. Salinity D. Temperaturehelp me please help me help me help me help me help 100 pts plez help 10 mins leftStephon is writing an essay that compares and contrasts the way in which characters from two different texts face obstacles in their lives. The two characters he is comparing and contrasting are Manjiro from Heart of a Samurai and William, the narrator of The Boy Who Harnessed the Wind. One similarity he notes is that Manjiro and William are both courageous.Which quotation from The Boy Who Harnessed the Wind would be most relevant for Stephon to include in his notes to support the idea that William is courageous?The preparation was complete, so I waited. The muscles in my arms still burned from having worked so hard, but now I was finished.They spun slowly at first, then faster and faster, until the force of their motion rocked the tower. My knees buckled, but I held on.I started wasting time in the trading center playing bawo. Someone also taught me a wonderful game called chess, which I started playing every day.No more skipping breakfast; no more dropping out of school. With a windmill, wed finally release ourselves from the troubles of darkness and hunger. explain one or two things that adversely (negatively) affect the Earth's environment. How do you know that these things you're discussing are bad for the world around us? What does the underlined word mean in the following sentence?No quiero *dormir*.O to eatO to sleepO to get used toO to give We know from the past that popular music changes over time. What are the causes of those changes. describe why these things influence musicians creating of music. HELP HELP HELP HELP EXTRA POINTS - The Butler plantation had more than 900 slaves worth more than_________________________. I HAVE NO OTHER EXPLANATION JUST TEARSSSSSSSSSSS AAAAAAAAAAAAAAASAAAAAAAAAAA T-T ill give brainliest (worth 15 pts) Look at the map and decide which of the following statements can be proven with information from the map? O The Rocky Mountains run the length of much of North America The Great Plains are the biggest landform in North America The Canadian Shield is the warmest region in North America The Appalachian Mountains are the tallest mountains in North American Need help please??????!!!!!!! simplify this answer pls