Answer:
Both inhalation and exhalation depend on pressure gradients between the lungs and atmosphere, as well as the muscles in the thoracic cavity.
Explanation:
The thoracic cavity, or chest cavity, always has a slight, negative pressure which aids in keeping the airways of the lungs open. During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle’s Law. This decrease of pressure in the thoracic cavity relative to the environment makes the cavity pressure less than the atmospheric pressure. This pressure gradient between the atmosphere and the thoracic cavity allows air to rush into the lungs; inhalation occurs. The resulting increase in volume is largely attributed to an increase in alveolar space because the bronchioles and bronchi are stiff structures that do not change in size.During this process, the chest wall expands out and away from the lungs. The lungs are elastic; therefore, when air fills the lungs, the elastic recoil within the tissues of the lung exerts pressure back toward the interior of the lungs. These outward and inward forces compete to inflate and deflate the lung with every breath. Upon exhalation, the lungs recoil to force the air out of the lungs. The intercostal muscles relax, returning the chest wall to its original position. During exhalation, the diaphragm also relaxes, moving higher into the thoracic cavity. This increases the pressure within the thoracic cavity relative to the environment. Air rushes out of the lungs due to the pressure gradient between the thoracic cavity and the atmosphere. This movement of air out of the lungs is classified as a passive event since there are no muscles contracting to expel the air.
Without the presence of enzymes, the reactions necessary to sustain life would require..
Answer:
higher temperatures
Explanation:
what two types of cells belong in the classification of eukaryotic cells
Answer:
Unicellular eukaryotic cells Multicellular eukaryotic cellsExplanation:
Unicellular eukaryotic cells are common in protists. Multicellular eukaryotic cells are common in plants, fungal and animal.Just a easy question .....
I want to see who can answer the faster and brainiest
Differences between duck and peacock
(Please don't spam ) Answer quickly please
Answer:
Duck is smaller whereas peacocks are big
Duck has black\brown features whereas peacocks have colorful feathers.
2. An injury that affects a ligament rather than a bone is likely to be examined using
a, magnetic resonance imaging,
b. Xays.
c, computer modeling,
d. transmission electron microscopy,
Answer:
magnetic resonance imaging
Explanation:
this is the right answer
What is an effect of the reduction in bird populations?
Answer:
There will be new niches formed as the birds remaining have to adapt to living with smaller population. There is a likely chance that they will develop changes in beak size and shape. The predators of these birds will have to adapt onto using a different food source, the birds may migrate to a safer area... or, theres a possiblility that the birds will simply go extinct!
Which of these is a benefit of using wind over nonrenewable sources of
energy?
A. Wind energy is cleaner than fossil fuel energy.
B. Wind energy is less developed than fossil fuel energy.
C. Wind turbines can produce noise pollution.
O D. Wind turbines can harm local wildlife, such as birds.
Answer:
A. Wind energy is cleaner than fossil fuel energy.Explanation:
We use the windmill for this only to utilize the wind energy as it is much cleaner fuel than the fossil fuel and can be renewed very easily.
plz help
name the parts of the virus labeled x and y
Answer:
X is matrix protein
Y is RNA genome
i hope it was helpful!
Explanation:
state the factor that is limiting the rate of photosynthesis in region x of the graph
Answer: deficiency of carbon dioxide
Explanation:
thanks and subscribe
Ritika observes that her father before storing the grains always dries them
under the Sun. What is the likely reason for this activity?
(a) To keep the grains warm.
(b) To increase the size of the grains.
(c) To prepare the grains for germination.
(d) To reduce the moisture content of the grains.
Answer:
to reduce the moisture content of the grains.
Help Dr. Limpkin design an experiment to test this hypothesis. (Be sure you can explain how you are going
to conduct the test and predict what the results will be if they support the experiment.) You are not to create
the data for your results section.
Hi, you've asked an incomplete question. Here's the missing passage reads:
"Honeybees play an important role in agriculture, by pollinating at least 90 different species of food plants, worth about 15 billion dollars in the U.S. alone. As a result, beekeeping or apiculture is a multi-million dollar business. However, over the last year, honey bee populations are crashing (Colony Collapse Disorder) with hives dying off in less than a week, without an obvious cause. Ian Lipkin a senior researcher in the Epidemiology (infectious disease) Department of Columbia University's Mailman School of Public Health believed the cause to be a pathogen (virus, bacteria, or fungus) of some sort. Use the information given to answer the following questions."
Design an experiment to test this hypothesis:
Need to remember, when we say experiment it basically means a scientific procedure carried out to test a hypothesis. While the word hypothesis refers to a question or assumption to be tested.
Hence, an experiment could involve selecting few groups of honeybees in the same location with the purpose of exposing each individual group to pathogens and different viruses and bacteria in other to observe if there are any trends.
Predict what the results will be if they support the experiment: In this case, a particular set of bees exposed to one of the viruses or pathogens should die faster than the other groups.
You could find a similar answer here: https://brainly.com/question/3956678?referrer=searchResults
Choose something about that a scientist may want to learn about a newly discovered species of dinosaurs
Answer:
A scientist might want to know their DNA
In a population of 200, 86 individuals express the recessive phenotype. What percent of the population would you predict would be heterozygous?
A. 35%
B. 55%
C. 65%
D. 45%
What animal is the dominant species in Yellowstone National Park?
Answer:
Janwar mein Bharat ka pahla Janwar kya ki prasiddh mukhe Ajmer mein iski Khoj
I WILL GIVE BRAINLIEST
(I) predict which of the liquids would cause the largest decrease in made of a potato stick.
(ii) The students dried the potato sticks with paper towels before putting them on the electronic balance
Suggest why.
Explanation:
(l) 0.1 mol per dm3 sodium chloride solution can cause the largest decrease in the potato stick
What is a characteristic of "bad" science?
O Experiments with controlled variables
O Studies with unbiased results and analysis
O Replicable experiments for all scientists
O Studies with results that cannot be repeated
Answer:
Explanation:
A B and C are all OK. They are the mark of good science. The one that is not is D.
No replication, no credit for work.
can someone help lollz.. I'll mark for most brainliest answer..
Answer:
freeb please lol
Explanation:
John wants to test how temperature affects the mass of sugar that can be
dissolved in water. Which of the following factors must be the same between
the control group and the experimental group?
A. The mass of the sugar
B. The temperature of the water
O C. The volume of the water
O D. The time of day
SUMIT
Answer
the mass of the sugar
Determine whether the following statement is true or false and why. “Variation caused by the environment is not heritable, so it is not subject to natural selection.”
A. True
B. False, it should read “Variation caused by the environment is heritable, so it is subject to natural selection.”
C. False, it should read “Variation caused by the environment is not heritable, so it is subject to natural selection.”
D. False, it should read “Variation caused by the environment is heritable, so it is not subject to natural selection.”
Answer:
True
Explanation:
Answer from gauth math
The statement "Variation caused by the environment is not heritable, so it is not subject to natural selection" is definitely true. Thus, the correct option for this question is A.
What is Variation?Variation may be defined as the indication of differences in the magnitude of response among individuals in an identical population given an identical dose of a compound.
Some variations are the results of differences provoked by surrounding or environmental factors. Such types of variations are called environmental variations. This type of variation is typically non-heritable in nature.
The variations that locate in the genomic sequence of an individual will tends to cause heritability and can pass from one generation to the next.
Natural selection deals with the process through which populations of living organisms adapt and change accordingly.
Therefore, the correct option for this question is A.
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Need some help figuring out what these are ASAP. Information is in the screenshots.
Answer:
it's SARS COV 2 the one in 2019
0.3 Product Ticket: CER
Question
Use the text to identify the sentences with evidence that matches the claim.
Claim 1 --> Tropical rainforests contain more biodiversity than all other biomes.
1) Biodiversity refers to the total number of different species of all kinds living in an area.
2) Tropical rainforests have many of the climate characteristics that organisms of different species need to grow, such as warm temperatures, plenty of rain, and many food sources.
3) There are large amounts of daily sunlight, which provides a great deal of energy to a variety of rainforest organisms.
4) Surprisingly, rain forest soil is very poor.
5) Due to the large amounts of rainfall, nutrients are leached out of the soil quickly.
6) Warm temperatures cause dead organisms to decay quickly, and the nutrients are then used by many different plants.
1, 2, 5
1, 2, 5
1, 3, 4
1, 3, 4
2, 3, 6
2, 3, 6
1, 4, 5
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What are the parts of an bacteria
Answer:The numbered parts are: (1) pilus, (2) plasmid, (3) ribosome, (4) cytoplasm, (5) cytoplasmic membrane, (6) cell wall, (7) capsule, (8) nucleoid, and (9) flagellum (Source: LadyofHats [Public domain] via Wikimedia Commons). One of the most important structures of a bacterial cell is the cell wal
Explanation:
A DNA strand has the sequence ATCGGC. Which is the complementary strand of DNA?
Explanation:
TAGCCG
For such problems you need to get the other base that would pair with the given one.
But note : you need to be careful not to confuse with the complimentary base pairs of RNA.
How are the workings of receptor in human body related to the sensors in a car listed below?
Light, Touch, Sound, Speed
I don't
Explanation:
know sorryyyyyyyyyyyy
Which would be least helpful in reducing indoor pollution?
Answer:
A fan probably would be least helpful because it would spread the dust, hair etc, around rather than removing it.
Explanation:
Why are glands needed in the male reproductive system
Answer:
Because they are essential for physical and mental development of a body.
Question 5 Multiple Choice Worth 4 points)
(03.02 MC)
The immediate result after DNA replication are
one old strand that came back together after replication and one completely new strand that was just assembled
O two completely new strands of DNA
O three strands of DNA, one old and two new
O two strands of DNA that each contain one strand of the original DNA molecule
Answer: C
Explanation:
Two strands of DNA that each contain one strand of the original DNA molecule.
The correct option is C.
Where Is DNA Found?A tiny quantity of DNA is also found in the mitochondria, where it is known as mitochondrial DNA, while the bulk of DNA is found in the cell nucleus, where it is known as nuclear DNA. Organelles such as mitochondria called mitochondria transform the energy from food into the a form that can be utilized by cells.
What is the main function of DNA?The instructions required for a creature to grow, endure, and reproduce are encoded in its DNA. Dna fragments must be transformed into messages that can be utilized to create protein, which are the protein complexes that carry out the majority of the work in our bodies, in order to perform these activities.
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The complete question is -
The immediate result after DNA replication are one old strand that came back together after replication and one completely new strand that was just assembled
A- Two completely new strands of DNA
B- Three strands of DNA, one old and two new
C- Two strands of DNA that each contain one strand of the original DNA molecule
Which would be considered a reliable source?(1 point)
an opinion column in your favorite magazine
an opinion column in your favorite magazine
an article from a scientific journal
an article from a scientific journal
a blog written by an anonymous author
a blog written by an anonymous author
a biology textbook from 1920
The source that is considered reliable is an article from a scientific journal.
An article that is considered a reliable source is that article that has undergone a thorough review by academic scholars.
A typical example of such articles are found in scientific journals.
Articles from a scientific journal are known to be from a reliable source because:
the author must have cited studies or other sources to be considered valid and reliablethe author must have done some research to provide evidence and name the sources they use.the authors work is usually peer reviewed from time to time.the articles in scientific journals cannot be altered by anyone except the original authors.Therefore, the source that is considered reliable is an article from a scientific journal.
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What explains why certain dead organisms in the past were not fossilized?
Answer:
They may not have skeletons, their body/bones were destroyed underground, the earth around them wasn't the correct type of rock, etc.
Explanation:
Only a small percentage of organisms are ever fossilized, and can only be fossilized under specific circumstances.
state two benefits of sage and two of its side effects
Answer:
Benefits of Sage
1.Relieving headache and sore throat pain.
2.Reducing oxidative stress in the body.
Side effects
.If consumed in excess, sage can trigger potentially serious side effects, including restlessness, vomiting, dizziness, rapid heart rate, tremors, seizures, and kidney damage. Sage essential oil is especially toxic, causing adverse symptoms with as few as 12 drops.
What was the best dependent variable in the lodine Clock Reaction?
Answer: Please refer to:
The time taken is therefore the dependent variable. To reduce random errors, three repetitions will be performed for each set of concentration.
Explanation:
Not sure but hope it helps.