What is the plasma (cell) membrane? What is its main function?

Answers

Answer 1

The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment.

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

Answer 2
The plasma membrane is the outermost layer of a cell. It’s mainly responsible to act as a barrier to maintain proteins within the cell

Related Questions

which body system is responsible for producing the hormone adrenaline?

Answers

Answer:

In the centre (medulla)

Explanation:

Of the adrenal glands and in some neurons of the central nervous system.

A close, interdependent relationship between two organisms is called . There are three main types of symbiotic relationships. In , both organisms benefit from the relationship. When one organism benefits but the other is harmed, their relationship is called . Occasionally, two organisms have a relationship where one organism benefits and the other is neither hurt nor helped. This type of relationship is called .

Answers

Answer:

A close, interdependent relationship between two organisms is called SYMBIOSIS . There are three main types of symbiotic relationships. In MUTUALISM, both organisms benefit from the relationship. When one organism benefits but the other is harmed, their relationship is called PARASITISM. Occasionally, two organisms have a relationship where one organism benefits and the other is neither hurt nor helped. This type of relationship is called COMMENSALISM.

The type of relationship where one organism benefits and the other is neither hurt nor helped is called commensalism.

What is commensalism?

In biology, commensalism is a connection between members of two different species in which one species uses the other for food or other purposes without causing the other any damage or gaining anything in return.

The commensal, or species that gains from the connection may take resources from the host species, which is unharmed, or find refuge, support, or means of movement. Frequently, a bigger host and a smaller commensal are in a commensal relationship.

The commensal species may exhibit significant morphological adaptation, whilst the host organism is virtually unaffected by the contact. Contrasting this connection with mutualism, which benefits both species,

A well-known illustration of a commensal is the remora (family Echineidae), a fish that travels in close proximity to sharks and other fish. Remoras have developed a flat, oval-sucking disc structure on top of their heads that cling to the bodies of their victims.

Remoras and pilot fishes both eat the leftover food from their hosts. Bird species like the magnificent egret (Ardea alba), which feeds on insects discovered by grazing animals or on soil creatures stirred up by plows, are other instances of commensals.

Therefore, this type of relationship is called commensalism.

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easy question - giving brainly if correct !!​

Answers

Answer:

i think its  C

Explanation:

i would go with c

Which of the following best represents the goals of the 1963 March on Washington organizers?

A.) To tell Congress they are doing great.
B.) To unify Americans to gather in non-violent protest to bring about real, actionable change
C.) To get the president on their side
D.) To support separate education

Answers

Answer:

D.) To support separate education

Explanation:

Answer:

B

To unify Americans to gather in non-violent protest to bring about real, actionable change

Explanation:

Originally conceived as a mass demonstration to spotlight economic inequalities and press for a new federal jobs program and a higher minimum wage, the goals of the march expanded to include calls for congressional passage of the Civil Rights Act, full integration of public schools, and enactment of a bill prohibiting ...

What is one property of a senescent cell?(1 point)

It can no longer divide.


It can grow and divide rapidly.


It can live for a very long time.


It can no longer be replaced.

Answers

What is one property of a senescent cell:

~It can no longer be replaced

Hope this helped you- have a good day bro cya)

One property of a senescent cell is that it can no longer divide.

Senescent cells are cells which help in tissue development in an embryo and also helps to promote healing of injuries.

These cells however exhibit a very a large lysosomal activity which destroys

vital components in the molecules . This thereby prevents the senescent

cells from not being able to divide.

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What is the most medial muscle of the leg?

Answers

Answer:

gracilis muscle

Explanation:

Mitosis is the division of the cell nucleus and cytoplasm into two genetically identical daughter cells.

a. True
b. False

Answers

Answer: True.

i am pretty sure.

Help with 1 and 2 plz make sure it’s right will mark brainiest

Answers

The answer should be
1. C
2.D

Does hot water tend to rise or sink? Explain.

Answers

Answer:

When fluids (liquids and gases) are heated, they expand and therefore become less dense. Any object or substance that is less dense than a fluid will float in that fluid, so hot water rises (floats) in colder water.

Explanation:

When you heat up water, the water molecules start moving around faster and faster. ... So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top.

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Keyori is making a model to illustrate the functions of ADP and ATP in photosynthesis. Which model best illustrates the role of ATP in photosynthesis?

A power plant that generates energy

A rechargeable battery that stores and releases energy

A pigment that receives the energy of sunlight

A hammer that helps break apart water molecules

Answers

Answer:

A. po

Explanation:

kadi i dont know sorry

What phases are A, B, C D, and E? I’ll mark brainliest if you’re right!

Answers

Answer:

A: Anaphase

B: Anaphase II

C: Prophase I

D: Metaphase I

E: Metaphase II

Explanation:

What is created by the flow of electric current?
A battery
An electric field
A magnetic field
A resistor​

Answers

A magnetic field is created by the flow of an electric current.

A magnetic field is created

> What is the name of this phase​

Answers

Answer:

This would be Metaphase. I hope this helps you! :)

where does the calvin cycle take place in the chloroplast

Answers

Answer:  stroma

Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).

Explanation:

3. What muscle is diretly beneath the biceps?

Answers

Answer:

coracobrachialis muscle

What helps weaken atp bonds so energy can be released and then later help reform them?

Answers

Enzymes help weaken these bonds so energy can be released and then later help reform them.

that's the answer

ADP (adenosine diphosphate) is formed when these high-energy connections between the phosphate groups at the end are broken, releasing energy for the cells to utilize.

How is energy stored in ATP?

One phosphate group is left on its own, these powerful associations may be broken and rebuilt with the aid of enzymes.

When a third phosphate is added to the ADP molecule, reforming ATP, water that was broken down into its hydrogen atom and hydroxyl group during ATP hydrolysis is recovered.

Energy must be introduced into the system to regenerate ATP, ADP develops and energy is released for the cells to utilize when these connections are broken.

Therefore, ATP has the capacity to store and transmit chemical energy, high-energy bonds are used to link the final two phosphate groups.

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Convert 10 cm to meters and express the answer to the correct number of significant digits.
A) 0.10 m
B) 0.1 m
C) 100 m
D) 1 m

Answers

Answer:

B. 0.1

Explanation:

Trust me

Answer:

(b) 0.1 m

Explanation:

edge 2022

how does chromatid cohesion as maintained by cohesin proteins differ in mitosis and meiosis?

Answers

It’s kinda a difference

Which organ systems work together to transport substances around a plant?

A.) Roots, leaves, flowers

B.) Stems, roots, flowers

C.) Stems, leaves, flowers

D.) Stem, roots, leaves

Answers

Answer:

B.) Stems, roots, flowers

Explanation:

a typical human chromosome contains about how many nucleotides in its dna?

Answers

Answer:

50 million nucleotide pairs

The typical human chromosome contains 50 million nucleotide pairs

in its DNA.

What is DNA?

Deoxyribonucleic acid (DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macro molecules that are essential for all known forms of life.

Hence, The typical human chromosome contains 50 million nucleotide pairs.

in its DNA.

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Which process would change metamorphic rock to igneous rock?

Answers

Answer:

If the freshly created metamorphic rock is exposed to enough heat, it may melt and become molten (magma). Igneous rock is formed when molten rock cools. Sedimentary and igneous rocks can both create metamorphic rocks.

The process that would change metamorphic rock to igneous rock is to treat metamorphic rock at extremely high temperatures and pressure that effectively transform it into a molten state. And this molten magma cools and crystallizes completely giving rise to the production of igneous rock.

What is Metamorphic rock?

Metamorphic rock may be defined as a type of rock that is significantly obtained due to the series of alterations in the pre-existing rocks. These alterations emerge due to changes in environmental conditions.

According to the context of this question, igneous forms are synthesized when the molten metamorphic rock cools and crystallizes due to the result of volcanic eruptions and melted rock inside the earth's crust. This happens due to the generation of extremely high temperatures and pressure.

Therefore, the process of formation of igneous rock from metamorphic rock is well described above.

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Describe how photosynthesis transforms energy from sunlight to chemical energy?

Answers

Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP. The third phosphate chemical bond contains the new chemical energy.

Answer:

Most life on Earth depends on photosynthesis.The process is carried out by plants, algae, and some types of bacteria, which capture energy from sunlight to produce oxygen (O2) and chemical energy stored in glucose (a sugar). Herbivores then obtain this energy by eating plants, and carnivores obtain it by eating herbivores.

Explanation:

1. Why can't sound waves travel through space?

Answers

Answer:

Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate

Explanation:

Hope it helps

what will happen to a population of organisms that are in an oxygen rich environment. (Double click the story board to draw on it)​

Answers

Answer

I'll assume this means adding additional oxygen to the atmosphere.

Paper airplanes now fly farther. With all that extra air, the air pressure near the surface increases significantly. Gliders, parachutists, birds and paper-plane hobbyists enjoy greatly improved performance.

Everyone gets better gas mileage. Oxygen-enriched air improves engine performance by producing hotter reactions and reducing the proportion of nitrogen, which reduces heat transfer (Page on Energy.gov)

Higher elevation Biomes become inhabited by more vertebrates. Areas such as the high Himalayas or high Andes are no longer off-limits to animals without special adaptations to increase their levels of hemoglobin.

Insects of unusual size. Many insects rely on gaseous diffusion to for respiration, therefore the maximum body size depends on the proportion of oxygen gas in the atmosphere. Most bugs get bigger, some smaller (see Atmospheric oxygen level and the evolution of insect body size)

Everyone feels more alert, active, and happier. All that fresh oxygen improve our cognition, alertness, and physical performance. As a result, most athletic records would likely be broken by oxygen-enriched athletes.

We get sick less often. Neutrophils, soldiers of the immune system, destroy bacteria by using NADP oxidase to pump ions into, and disrupt, intruding cell's membranes causing rupture. More oxygen, more oxidase. (Page on Nih.gov)

We die younger. Free radicals (i.e. O2-) are thought to exacerbate the aging process through Oxidative stress, which interferes in numerous cellular processes: protein production, DNA replication, intercellular communication, and are also thought to contribute to MS, Alzheimers, Parkinsons, and a host of other ailments.

Explanation:

Use each vocabulary term in a sentence.
13. controlled study
14. environmental ethics

Answers

Answer:

Controlled study:

We conducted a controlled study on the two plants.

Environmental ethics:

The man over there is all business he talks of social and environmental ethics.

Explanation:

Hope this helps :}

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And have an amazing day <3

21. Three different processes are occurring in the drawing below. Name each process and describe it.

Answers

Answer:

Process A is diffusion

- diffusion is the random movement of molecules from the area where there is more of them to an area where there is a few of them without the input of energy.

Process B is facilitated diffusion

- facilitated diffusion is the transport of substances across a cell membrane from an area of higher concentration to a lower concentration with the help of Transport protein

Process C is active transport

- A ctive transport is when an input of energy is required to move materials through a cell membrane .

In basidiomycete fungi, where specifically do nuclei from parents combine to make offspring spores

Answers

In basidiomycete fungi, the nuclei from parents combine in the BASIDIA to make offspring spores. Basidia are microscopic structures but they are generally produced on large fructifications known as fruit bodies.

A basidium is a sporangium localized on the hymenophore of the fruiting bodies in basidiomycete fungi.

In basidia, the nuclei of two parental strains fuse by karyogamy and then divide to reproduce basidiospores.

A basidium generally contains four sexual spores known as basidiospores.

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which muscle functions in extensions of the digits of the hand?

Answers

Hello!

Extensor Digitorum:

The extensor digitorum is the main extensor of the fingers. Attachments: Originates from the humerus, splitting into four tendons at the wrist which travel through the carpal tunnel and attach to the digits. Actions: Extends fingers.


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PLZ HELP ASAP(giving 80 points):
2. Write a micro-theme(short paragraph [100-300 words]) using and explaining the following terms.
a. "Survival of the fittest"
b. Adaptation
c. Evolution

Answers

survival of the fittest is the test of adaption which in turn aides in the process of evolution

Explanation:

PLEASE HELP!!!!!

Which of the following is NOT likely to be an outcome of building more wind and solar farms?
A: an increase in air temperature
B: an increase in rain
C: a change in wind path
D: a decrease in farming output

Answers

Answer: B: an increase in rain

Explanation:

Answer:

an increase in rain

Explanation:

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