which of the following are protective barriers that are part of the body's immune system​

Answers

Answer 1
The skin, mucous membranes, and endothelia throughout the body serve as physical barriers that prevent microbes from reaching potential sites of infection. Tight cell junctions in these tissues prevent microbes from passing through.

Related Questions

Certain cells, such as erythrocytes, do not contain DNA. Which of these is MOST likely true for these
cells?
o
A. They do not move.
o B. They do not reproduce.
o
C. They do not contain proteins,
o
D. They do not perform homeostasis.

Answers

Answer:B

Explanation:

The boiling point of a subtance is the point at which the subtance ments.

A) True
B) False​

Answers

Assuming you meant melts and not ments (if it was the latter, I have no idea what you mean), the answer is False. The melting point is when the substance melts, turning from a solid to a liquid. On the other hand, the boiling point is when the substance turns from a liquid to a gas.

JUST ONE PLZ!
Which describes a characteristic of quartzite?

igneous
foliated
does not split into layers
grains arranged in parallel layers

Answers

Answer:

Igneous

Explanation:

individuals do not evolve.Populations evolve. True or False?​

Answers

Answer: false

Explanation:

Individuals do not evolve as a result of natural selection over successive generations. Populations evolve ONLY as certain traits become more common and others go away.

Answer:

False

Explanation:

Singular living beings don't evolve, they hold similar qualities for an amazing duration. At the point when a populace is advancing, the proportion of various hereditary sorts is evolving. Hope this helps!

Describe Range: (idk)

Answers

Answer:

Well if you mean species,  it means the range or distribution of a species is the geographical area or habitat where the species live.

Explanation:

It would help if you could be more specific, But i hope it helps!!

What makes it possible for us to be able to live on the earth?

Answers

Answer:

oxygen and H20

Explanation:

...AIR AND WATER

Answer: homeostasis

Explanation: homeostasis is the regulation and maintenance of out internal environment, this also includes gas exchange, (oxygen to carbon dioxide) which enables the ability to breathe. If our body would not be able to maintain homeostasis, every system in the human body would not be balanced, resulting in a disabled environment.

A student wants to test the effect of different amounts of caffeine on the heart rate of dogs. Describe the experimental groups in this experiment. What is the dependent variable? type of dogs amount of caffeine the heart rate number of dogs

Answers

Answer:

Experimental groups: type of dogs

Dependent variable: hearth rate

Independent variable: the amount of caffeine  

Explanation:

The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.

¿Que aspecto debemos considerar para desidir el uso mas adecuado de lagunos materiales en la satisfacción de necesidades humanas sin afectar la salud y el medio ambiente?

Answers

Answer:

El efecto del material sobre el medio ambiente es el aspecto a considerar.

Explicación:

Se debe verificar la estructura química del material o de qué elementos se forma un material para conocer el efecto de estos materiales en la salud y el medio ambiente de las personas. Si los materiales no afectan el medio ambiente y la salud humana, el ser humano puede utilizarlos para satisfacer sus necesidades. Si el material se forma a partir de elementos tóxicos o elementos que no se descomponen por microbios, entonces este tipo de materiales son peligrosos tanto para la salud humana como para el medio ambiente porque estos materiales contaminan el medio ambiente y debido a esta contaminación la salud humana se ve gravemente afectada.

What other three things do Volvox also likely lack?
A. Organs
B. Organ systems
C. Cells
D. Muscles

Answers

Answer:

B,D,A is the right answer.

Explanation:

The three things Volvox lack is Organs, Organ System, and muscles.

What Volvox likely lacks?

This is the most complex level of organization in life. several Volvox, one of the simplest multicellular living things. Volvox has no tissues.

What makes Volvox unique?

In the northern region, the eyespots are more developed. This helps the colony to swim towards the light. This differentiation of cells makes Volvox quite unique. It is a colony that comes really close to being a multi-celled organism.

What is a fact about Volvox?

Volvox is a freshwater alga that is found in ponds, ditches, and even in shallow puddles. Volvox is nothing but a chlorophyte or green algae which exists as a grand spherical colony. Each little algae within the colony hold two flagella, whip-like hair.

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Please help me with this question!!!!!

Answers

C) 6, because what regulates the movement of substances in and out is the cell membrane
The answer is c....so yeah

The largest known protein with the greatest number of amino
acids is

Answers

Answer:

Titín is the largest know protein with the greatest number of animo

The largest known protein with the greatest number of amino acids is titin.

What is titin ?

Titin or connectin  is a largest protein  in humans which is encoded by the TTN gene, having greater than 1 µm in length and it functions as a molecular spring  responsible for the passive elasticity of muscle.

It consist of 244  folded protein domains connected by unstructured peptide sequences, when the protein is stretched, the domains will unfold.

Titin protein involve in the contraction of striated muscle and connected  the Z line to the M line in the sarcomere, contributes to force transmission at the Z line.

It limits the motion range of the sarcomere during tension,  so it involve in the contribution of  passive stiffness of muscle, it is the third most abundant protein in muscle after myosin and actin.

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QUICK CHECK
Choose the correct measuring device for gathering
data from the list of tools in the drop-down menu.
temperature of the water
heartbeats per minute
volume of liquid
time
DONE
distance across the pond

Answers

Answer:heart monitor

Stopwatch

Digital tape measure

Thermometer

Graduated cylinder

Explanation:

Measuring devices are used as follows -1. Thermometer, 2. Heart monitor, 3. Measuring cylinder, 4. Clock, 5. Tape measure

What are measuring devices?

The instruments that are used for the measurements of various specific items based on the laws and the theories of measurement are called measuring devices.

Specific measurements have specific measurement devices. These measure the value based on the specific unit of the measurement.

For example, an inch tape measures the length of something in inches. It also has scales of centimetres and meters.

For the measurement of length, scales and tape measures are used.

For the measurement of time, clocks are used.

For the measurement of volumes, graduated cylinders are used.

For the measurement of temperature, thermometers are used.

Therefore, the measuring devices vary according to the function it needs to perform. In this case, 1. Thermometer, 2. Heart monitor, 3. Measuring cylinder, 4. Clock, 5. Tape measure.

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Why is water necessary for living things?

Answers

Answer:

To survive

Explanation:

Without water, we wouldn't have organisms such as fish. We also need it to break down food molecules or generate energy during the respiration process.

Hydrophobic substances such as vegetable oil are *
1 point
nonpolar substances that repel water molecules.
nonpolar substances that have an attraction for water molecules.
O polar substances that repel water molecules.
O polar substances that have an affinity for water.

Answers

Nonpolar that repels water

Hydrophobic substances such as vegetable oil are nonpolar substances that repel water molecules.

What are non polar substances?

Nonpolar substances are molecules that do not have a charge separation between different parts of the molecule. This means that they do not have a polar, or electrically charged, end, and as a result, they do not dissolve well in polar solvents like water.

Nonpolar substances are hydrophobic, meaning that they repel water molecules, and tend to dissolve in other nonpolar substances, such as oils and fats. Examples of nonpolar substances include hydrocarbons like gasoline, fats, oils, and waxes, as well as some gases, like nitrogen and methane. Nonpolar substances play an important role in a variety of biological and industrial processes, and their unique properties make them useful for many different applications.

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2. If you notice a strange smell in your house, what should you be most alert for?
A gas leak
A mold colony
An electrical short
There's no need for concern

Answers

Hey I’ll help you answer : a gas leak

Answer:

A gas leak

Explanation:

The two most common source of a rotten egg smell are a natural gas leak.

Wolves follow their young because their young’s grazing disturbs others habitats making for a easy meal. This is an example of commensalism, mutualism or predation?

Answers

Answer:

its commensalism!!!!!

Explanation:

What is the most basic unit of life?

Answers

Answer:

cell

Explanation:

cell is the basic unit of life

What are the two types of reproduction and explain?

Answers

Explanation:

There are two types of reproduction: asexual and sexual reproduction. Though asexual reproduction is faster and more energy efficient, sexual reproduction better promotes genetic diversity through new combinations of alleles during meiosis and fertilization.

Answer: sexual and asexual

Explanation:

sexual is two people asexual is by itself

What are a group of cells called?

Answers

Answer: It is called a Tissue

Explanation:


A group of specialized cells is called a tissue. A tissue might be formed of different types of specialized cells.

what dose it mean when we say water molecules break apart

Answers

answer: A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. H2O molecules connect with from one hydrogen to another molecule.

explanation: This bond is very weak. Hydrogen bonds are formed easily when two water molecules come close together, but are easily broken when the water molecules move apart again.

cats falling out of windows experimental design worksheet answers?​

Answers

Answer:

Feline High Rise Syndrome

Explanation:

FHRS is found in cats usually when they fall from great height or steep elevation. The cat can incur injuries to itself when they fall. This occurs when they fail to jump properly or miss the jump while landing. The nature of cats is usually athletic and they take risks for their jumps. If the cat misses a jump they fall from the height which results in severe injuries to it and sometimes causing death.

As seen from Earth, what causes the Moon to change its apparent shape throughout the month?​

Answers

Answer:

The Moon doesn't emit (give off) light itself, the 'moonlight' we see is actually the Sun's light reflected off the lunar surface. So, as the Moon orbits the Earth, the Sun lights up different parts of it, making it seem as if the Moon is changing shape.

Explanation:


What is the main function of endoplasmic reticulum in a cell

Answers

Answer: The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism

Explanation: Hope this helped !

Which cards are nucleic acids?

Answers

Answer:

Card 33

Explanation:

I hope this helps you :)

What kinds of things might scientist measure in a mine or well???

Answers

Answer:

In wells Scientist measure dissolved oxygen, or DO (pronounced dee-oh).

The kind of thing that might scientist measure in a mine or well is the amount of dissolved oxygen. It is also named DO.

What is the responsibility of Scientists?

Scientists are widely responsible for conducting and communicating scientific works on the basis of their respect, integrity, fairness, transparency, and trustworthiness. They always considered the consequences of new knowledge and its application.

According to the context of this question, scientists perform their role for the betterment of society, reliability, and efficiency of human beings with full concentration.

The amount of dissolved oxygen delivers the significance of nutrients present in a well or mine. Scientists conduct and gather research perspectives in order to gain knowledge in a particular area.

Therefore, the kind of thing that might scientist measure in a mine or well is the amount of dissolved oxygen.

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atoms in covalent bonds___their electrons​

Answers

Answer:

gain there electrons that they didn't have before

yea i know another but please help!!!​

Answers

Though anaerobic respiration in the cytoplasm. So your answer is B)

can someone please give me a question about genetics and heredity!

Answers

Answer:

Can cancerous cells be passed down by genetics and inherited to family?

Explanation:

hope it helps

Answer:

Genetics : Why don't identical twins look the same ?

                  How much information is in our DNA ?

Heredity :  Can hereditary diseases be cured?

Explanation:

Find the volume of
this swimming pool:
Length = 12m,
Width = 5m
Height (or depth) = 5m.
А
B
300 m3
150 m3
3000 m3

Answers

Answer:

300 m3

Explanation:

l x w x h

12 x 5=60

60 x 5 = 300

Answer: 300 m3

Explanation: 12m × 5m × 5m = 300 m3

The formula for volume is length × width × height

Which type of microscope allows you to look at 3D objects? *

compound
stereoscope
magnifying
simple

Answers

Answer:

Stereoscope

Explanation:

Stereo Microscopes enable 3D viewing of specimens visible to the naked eye.

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