Answer:
Mechanical barriers — which include the skin , mucous membranes , and fluids such as tears and urine — physically block pathogens from entering the body. Chemical barriers — such as enzymes in sweat , saliva , and semen — kill pathogens on body surfaces.
Physical barriers and chemical barriers are two types of barriers in the immune system. These barriers help prevent the entry of pathogens into the body. There are differences between physical and chemical barriers.
Physical barriers are physical structures that prevent the entry of pathogens into the body. These barriers include the skin, mucous membranes, and cilia. The skin is the most significant physical barrier. It covers the entire body and serves as a barrier against pathogens. The skin has a few layers that prevent the entry of microbes.
Additionally, the skin has sebaceous and sweat glands that produce sebum and sweat, respectively. These secretions have antimicrobial properties. Mucous membranes are another physical barrier. They line various parts of the body, such as the respiratory tract, gastrointestinal tract, and reproductive system.
They secrete mucus, which traps microbes and foreign particles. Cilia are hair-like structures that line the respiratory tract. They move in a coordinated manner and help remove microbes from the respiratory tract.
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Jessica Mitford's, "The American Way of Death," published in
1963, played a critical role in changes in the funeral industry.
O True
O False
Is it true?
Answer:
true
Explanation:
what is co2 + ho2 +co2 + me??
now
Answer: Trick question
it is carbon dixode that what i wrote
Explanation:
Many types of animals have internal skeletons. A large part of these animals' masses is located in their bones. As an animal grows, its skeleton grows. A growing animal must increase the size of its bones. To do this, the animal needs lots of calcium, an element important to the structure of bones.
How can a growing animal get calcium to make new bone tissue?
1) Students in a science class created Eco columns to mimic a small ecosystem. Grass seeds were planted in 50 grams of potting soil, insect species were added, and 100 ml of water was administered.
Which statement(s) are supported by the data in the table? Select ALL That apply.
A) The grass height was the dependent variable.
B) The grass height was the independent variable.
C) The presence of insects was the independent variable.
D) The presence of the water was the independent variable.
E) Intermediate numbers of insects had the greatest positive impact on grass growth.
B) The grass height was the dependent variable.
E) Intermediate numbers of insects had the greatest positive impact on grass growth.
How insects affect the plant growth?The grass height was the dependent variable because it depends on the nitrogenous waste of insects and presence of water. The numbers of insects had the greatest positive impact on grass growth because they provides nutrients to plant in the form of nitrogenous water so we can conclude that option B and E are the correct options.
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Answer:
b
Explanatikjnjqkdddddddnnnnndbvwhhhhhhhhhhhhhh
Many times at crime scenes not much evidence is available for collecting. What are 4 biological materials from crime scenes that you could extract DNA from?
PLS HELP WILL GIVE 100 POINTS AND MARK BRAINLIEST !
Please help. Explain whether you think nuclear energy is a viable source for the future energy needs of the
United States.
Answer:
Of course nuclear energy is a viable source for the future energy needs of the US.
Explanation:
Right now, we are using fossil fuels to fuel our daily electricity needs. But we will soon run out of steam, coal and much more fossil fuels as the years come. So we will need to make the change before it's too late, and switch to renewable energy sources or nuclear energy. Fossil fuels also cause a lot of pollution, which causes global warming, which is bad because it releases greenhouse gasses which reflect sunlight back onto the Earth, thus reducing much of the species of animals that depend on snow and ice. Glaciers will melt, which will increase the water level and soon Earth will be flooded and full of pollution, so we have to switch to better energy sources faster.
In which part of your body would you find the cruciate ligament?
Answer:
It is located in the knee
Answer:
IT IS IN THE KNEE
Explanation:
What is the total surface area of the rectangular prism in square inches?
Answer: Surface area = 211 1/2
Explanation: Surface Area of rectangular prism= (height*width)*2+(length*width)*2+(height*length)*2
(4 1/2 * 3 1/2)*2 + (11 1/4 * 3 1/2)*2 + (4 1/2 * 11 1/4) *2 =
(15 3/4 * 2) + (39 3/8 * 2) + (50 5/8 * 2) =
31 1/2 + 78 3/4 + 101 1/4 =
211 1/2
perbuat
Voal 19911 Dumput
dos por min
4.0
heart to
beats
55
70
80
9
4.3
5.2
5.6
6.0
120
140
150
170
5.8
4.6
b)
Answe: in normal human beings a heart beats 72 times per minute.
What is the importance of the feedback mechanism in the regulation of the menstrual cycle?
Feedback is necessary thing during menstrual cycle.
Proper and positive feedback helps in burst of rate of flow in FSH ,LH and EstrogenNegative feedback can create obstacles in menstrual cycle.
WORTH 50 POINTS
Directions
Enter "The Cloud Caster" below. Select a city, identify the clouds for that city, and then select the weather you can expect for that type of cloud. Do this for each city.
After completing "The Cloud Caster," answer the questions at the end of this exercise.
Questions:
1.Which type of clouds can you always expect to signal fair weather: cirrus, stratus, or cumulus?
2.Which type of clouds can you always expect to bring precipitation: alto, nimbus, or cumulus?
3.List these clouds from highest to lowest: cirrus, stratus, fog, altocumulus.
4.Which type of cloud occasionally produces precipitation: stratus, short cumulus, or cirrocumulus?
5.Did you make Prime Time television, or was your show cancelled?
Answer:
this does not make sense is there a picture or sum ?
Explanation:
I need help with these 4 questions in class anyone help asap?!!!
Answer:
1. An analogous structure is when a animal evolves to gain an ability such as flight. but this includes the animal won't be able to gain it like other ones such as for example insects and bats they evolve and gain the ability at different times.
2.Adaptation is when a animal has to get used to it's new environment such as getting a pet from Petco the animal needs to get used to YOU. and the environment you have given it.
3.Biodiveristy refers to all the variety of life that can be found in earth.
Ex: Plants,animals,Fungi, And micro-organisms.
This also includes the community that they form and the habits in which they live.
4Extinction is when an animal species can no longer be created or found in other cases this means the animal will be remembered in photos,videos,And drawings
Ex: If all the dogs in the world die in just the matter of seconds and they cannot breed or scientifically create one. then the animal is no longer part of the world species. thus making it extinct.
Explanation:
Sorry if I'm wrong.
hope this helps.
Consumers rely on other
organisms. Why?
A. They cannot make their own food.
B. They cannot capture other organisms.
C. They cannot protect themselves
Consumers rely on other organisms because A. They cannot make their own food.
What are Consumer heterotrophic organisms in the ecosystems?Consumer heterotrophic organisms in the ecosystems are species that cannot synthesize their own food such as occurs in the case of animals that need to eat other organisms to satisfy their energy needs, while plants and algae are autotrophs.
Therefore, with this data, we can see that Consumer heterotrophic organisms in the ecosystems are not able to produce their own foods and therefore they need to eat other organisms to survive.
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Consumers rely on other organisms because they cannot make their own food.
The correct option is A.
What are consumers in living things?In ecology, consumers are organisms that obtain their energy and nutrients by feeding on other living organisms or their organic wastes. They are also known as heterotrophs, as they cannot produce their own food and rely on other organisms for sustenance.
Consumers can be further classified based on what they eat. Herbivores are consumers that eat only plants, while carnivores eat only other animals. Omnivores eat both plants and animals, while detritivores and decomposers break down dead organic matter and recycle nutrients back into the ecosystem.
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what is isthmus in uterus .
Which deadly infectious diseases can spread through food or water?
A. Dysentery and colds
B. colds and tetanus
C. Tetanus and cholera
D. Cholera and Dysentery
Answer:
D, Cholera and Dysentery
Explanation:
Colds travel through contact and air. Tetanus infects through metal.
1 point
Which of the following best explains why a muscle cell is different from a
nerve cell in the brain?*
A. The nerve cell expresses different genes than the muscle cell
B. The nerve cell has more genes than the muscle cell
C. The muscle cell has more genes than the nerve cell
O D. The muscle cell has different genes from the genes found in a nerve cell.
Answer:
B
Explanation:
The nerve cell has more genes than the muscle cell
How does pressure affect osmosis
Answer:
Explanation:
The more the pressure, the faster the molecules will move for they are being pushed faster across a low concentration.
What are the missing two words? In aerobic respiration, glucose and oxygen are used up and __________ __________, water and energy are released.
The answer is carbon dioxide.
Hope that helps!
In aerobic respiration, glucose and oxygen are used up and Carbon dioxide, water and energy are released.
What is aerobic respiration ?
It is the process of cellular respiration that takes place in the presence of oxygen gas to produce energy from food.
What are the end product of aerobic respiration ?
Aerobic respiration is common in most of the plants and animals, birds, humans, and other mammals. In this process, water and carbon dioxide are produced as end products.
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What are stem cells? How are cells specialized?
Answer:
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost.
Explanation:
Imagine a parallel Earth that is the same as ours, but the technological life form is not human beings. The organism that evolved to create technology, culture, and civilization is a creature that is photosynthetic but is mobile like animals. Think about our different body systems, and the way our history has evolved from paleolithic to modern times. What might their physical, technological, houses, cities, and cultural development be like?
The main point of divergence between these beings would be the fact that they are photosynthetic being autotrophic beings.
What would be the advantages of moving and thinking autotrophic beings?These beings from another planet would be able to synthesize their own food from inorganic material, thus being more evolved, as they would not need to develop methods of obtaining food, leaving more resources for technological and social development.
With this information, we can conclude that the main point of divergence between these beings would be the fact that they are photosynthetic being autotrophic beings.
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How does groundwater contribute to erosion?
Earth science.
Answer:
Explanation: Its easy its science the salt water moves which causes erosion
Dichotomous key.
HELP PLS !!!!!
Answer:
A dichotomous key is an important scientific tool, used to identify different organisms, based the organism's observable traits. Dichotomous keys consist of a series of statements with two choices in each step that will lead users to the correct identification
In phylogenetics, a single-access key is an identification key where the sequence and structure of identification steps is fixed by the author of the key. At each point in the decision process, multiple alternatives are offered, each leading to a result or a further choice.
Explanation:
(Find the word puzzle) SUPERBUGS: A HEALTH EMERGENCY. Could somebody help me find these terms? I suck at these. >:(
Explanation:
So, I know you want all of the answers but I can give you a method I use.
I look like by line to look for the first letter of the word you're looking for. (Cirled in blue)
Then check a 3 by 3 box for the second letter of the word. (Boxes in green)
If there is the second letter (in red) continue down that direction to find the word (in yellow)
what is c02 + c02 ??
help me answe now
Answer:
oxygen
Explanation:
Carbon dioxide is composed of one carbon atom covalently bonded to two oxygen atoms
What sequence represents alternating glacial/interglacial periods during the Pennsylvanian?
a. cyclothems
b. amniote egg
c. clastic wedges
d. microcontinent
The sequence that represents alternating glacial/interglacial periods during the Pennsylvanian is clastic wedges.
What do you mean by Glacial/Interglacial periods?Glacial/ Interglacial periods may be defined as a time period during which accumulation of ice takes place and degradation of ice occurs respectively.
Clastic wedges may be referred to as the thick accumulation of sediments that are eroded as well as deposited by the land through the activity of mountains.
Therefore, the sequence that represents alternating glacial/interglacial periods during the Pennsylvanian is clastic wedges.
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What are the thin fibers of the human nervous system called?
o ligaments
Ospinal cord
O
nerves
O tendons
Answer:
C.) nerves
Explanation:
A nerve is a thin bundle of fibers that connects the body to the brain and receives and transmits messages. I hope this helps! ^-^
This affects the plants and animals that live in a place.
Can you please help
Answer:
right ventricle
Explanation:
because it pump the blood to the right atrium into the lungs
If the cell were a shoe factory, what structure would be the boss of the factory?
Answer:
The nucleus would be the boss.
Explanation:
circular
True or False?
Adenine (A) will pair up with Guanine (G) and Cytosine (C) will pair up with Thymine (T) on a strand of DNA
Answer:
False. A with T and C with G
Explanation:
Answer:
False
Explanation:
Adenine pairs with Thymine, and Guanine pairs with Cytosine.