When is facilitated diffusion necessary?

a.) When the molecules are too large.

b.) When the molecules are insoluble.

c.) When the direction of movement is opposite to natural diffusion.

d.) none of the above

Answers

Answer 1

Answer:

It is option C I think.. Not so sure but I think it's the right answer


Related Questions

describe the functional and comparative genomics

Answers

Answer:

Comparative genomics is a field of biological research in which researchers use a variety of tools to compare the complete genome sequences of different species. By carefully comparing characteristics that define various organisms, researchers can pinpoint regions of similarity and difference.

Functional genomics is a field of molecular biology that attempts to describe gene (and protein) functions and interactions. Functional genomics make use of the vast data generated by genomic and transcriptomic projects (such as genome sequencing projects and RNA sequencing).

Explanation:

Methamphetamine increases the brain's levels of dopamine, __________ and __________.

a) norepinephrine, serotonin

b) GABA, epinephrine

c) acetylcholine, enkephalins

d) glutamate, serotonin

Answers

Answer:

a) norepinephrine, serotonin

Explanation:

Neurotransmitters are special lipid-based molecules used in chemical signal transduction in the nervous system. They have receptor-specific roles in activating different regions of the central nervous system (CNS) and physiological responses. These include: dopamine, norepinephrine, and serotonin .

The CNS, which includes the brain and spinal cord, can be affected by certain drugs like methamphetamine. This drug is a stimulant that acts on brain regions such as:

prefrontal cortex the striatumthe nucleus accumbens

It causes the release of neurotransmitters while blocking their reuptake at synapses; meth is metabolized very slowly over time (12 hours). The buildup of dopamine, for instance, leads to altered moods, feelings of pleasure and euphoria.

Thus, this change or "high" leads to dependency by users for its mood-altering effect; however, less dopamine is released, and the pleasurable effects, become less potent.  Studies show neurological damage with prolonged use, and habit formation and over time, addiction.

Humans deplete the most resources when

Answers

Answer:

Resource depletion is the consumption of a resource faster than it can be replenished. Natural resources are commonly divided between renewable resources and non-renewable resources (see also mineral resource classification). Use of either of these forms of resources beyond their rate of replacement is considered to be resource depletion. The value of a resource is a direct result of its availability in nature and the cost of extracting the resource, the more a resource is depleted the more the value of the resource increases. There are several types of resource depletion, the most known being: Aquifer depletion, deforestation, mining for fossil fuels and minerals, pollution or contamination of resources, slash-and-burn agricultural practices, Soil erosion, and overconsumption, excessive or unnecessary use of resources.

Resource depletion is most commonly used in reference to farming, fishing, mining, water usage, and consumption of fossil fuels. Depletion of wildlife populations is called defaunation.

Explanation:

Which of the following statements is true of a green apple?



It reflects green light and absorbs other colors


It absorbs green light and reflects other colors


It reflects green light and emits other colors


It transmits all colors except green.


It transmits green light and absorbs everything else.

Answers

Answer:

reflects green light and absorbs all other colours

Explanation:

The answer is "It reflects green light and absorbs other colors"

when you see a red rose, all the colors of light are being absorbed except witch of the following ​

Answers

Except for the red light

Answer:

U

Explanation:

While gravity is always attractive, electromagnetic forces are always repulsive.
O True
O False
II.

Answers

false!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

describe the unique intercellular connections between muscle cell

Answers

The unique intercellular connections between muscle cells are called intercalated discs. They are in the cardiac muscle. An intercalated disc has gap junctions and desmosomes, which are two ways that cells use to communicate with each other. Gap junctions connect neighbor cells, and desmosomes keep the cardiac cells together.

Cardiac cells are connected by intercalated discs, which has two structures:

Gap Junctions:

They are channels that communicate cells that are next to each other. Gap junctions allow the passage of ions quickly so that all the cardiac fibers can contract in a coordinated and fast way.

Desmosomes:

They are at the ends of the cardiac fibers, and they hold the cells together thanks to the different proteins that form this structure. As they can resist a lot of effort, they are one of the cardiac cell's junctions.

Learn more at:

https://brainly.com/question/23416641?referrer=searchResults

in unicellular organisms, what makes up the organism

Answers

Answer:

Unicellular organisms include bacteria, protists, and yeast.

Explanation:

If the heart rate drops and the stroke volume increases, cardiac output will always show a
decrease.
O True
False

Answers

Answer:

False

Explanation:

hope this helped! :)

Please select the word from the list that best fits the definition

Churns and breaks down food into a liquid form

A) mouth
B) stomach
C) esophagus

this is on edge2020

Answers

C hope this helps. ............

What role do plankton play in the oxygen cycle?
O A. They release carbon dioxide in the ocean.
O B. They produce oxygen in the forests.
C. They produce oxygen in the ocean.
D. They absorb carbon dioxide in the forests.

Answers

They observed carbon dioxide in the forest ps I did the test

Which theory is represented in this diagram?
The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning
The theory that all living organisms share the same basic genetic components
The theory that organisms function best when their internal conditions are maintained within narrow limits
The theory that all living organisms are made of cells

Answers

The correct answer is A. The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning.

Explanation:

This diagram shows how a primitive cell or a cell containing only genetic material evolves into a complex cell with specific organelles such as chloroplast or mitochondria by engulfing or integrating other cells, especially prokaryotic cells that continue living in the primitive cell and become specialized organelles. This process supports the theory the evolution of cells was possible as simple cells engulfed bacteria because as the diagram shows the engulfed bacteria evolved into organelles that make the cell become more complex as there were specific structures in the cell for different functions.

ASAP!!!!!!!!!

How do plants help prevent erosion?
Plant leaves take in carbon dioxide during photosynthesis.
Plant roots absorb water from the ground.
Plant roots help to hold soil in place.
Plant leaves are used to create fabrics and other materials.

Answers

Answer:

plant roots hold soil in place

Explanation:

have a nice day

Answer:

plant roots hold soil in place

Explanation:

top person star whatever was right

An example of a succulent is a _

Answers

Answer:

Agavoideae

Explanation:

POSSIBLE POINTS
A part of the circulatory system allows the exchange of water, oxygen, nutrients, and waste between the blood and surrounding
tissues. Which part of the circulatory system is described. ?

Answers

Answer:

rough ER → ER-to-Golgi transport vesicles → Golgi cisternae → secretory or transport vesicles → cell surface (exocytosis)

Explanation:

What are the steps in the scientific process to test whether plants need water to survive?

Answers

Answer:

Please find the detailedly explained steps below

Explanation:

Scientific investigation involves the use of the SCIENTIFIC METHOD, which involves series of steps including:

- Making an observation/Asking a question

- Formulating a hypothesis

- Testing the hypothesis

- Analysing the result

- Conclusion

1) Making an observation/Asking a question: An observation is initially made prior to any investigation. In this case, the observation is whether plants need water to survive. A scientific question can be asked by saying DO PLANTS NEED WATER TO SURVIVE?

2) Formulating a hypothesis: After a question has been asked or an observation has been made, a HYPOTHESIS, which is a testable explanation given to solve or answer the problem is given. A hypothesis is usually in an IF, THEN format. A hypothesis concerning the observation can go thus: IF plants are not supplied with water, THEN they will not grow.

3) Testing the hypothesis: In order to test the hypothesis, an experiment is conducted. This experiment is set up in such a way that two group of plants are used. One group receives water (experimental group) while the other doesn't receive water (control group). The water is the INDEPENDENT VARIABLE while the plant growth measured is the DEPENDENT VARIABLE.

4) Analysing the result: The results of the experiment are analysed and computed in an organized way that can be comprehended.

5) Conclusion: This is the point where the hypothesis will be accepted or rejected based on the results of the experiment. For example, in this case, if plants that are not supplied with water grows, the hypothesis will be REJECTED.

PLEASE HELP I WILL GIVE BRAINLIEST(10 points)
NON SERIOUS ANSWERS WILL BE REPORTED

What substance in the esophagus lining helps make swallowing easier?

a.

saliva

b.

pepsin

c.

mucus

d.

bile



Please select the best answer from the choices provided


A

B

C

D

Answers

Answer:

The awnser is c. mucus good luck!

Explanation:

If you followed a woman's cells through meiosis, at what stage of meiosis would the amount of DNA in one of these cells be equal to the amount of DNA in one of her G1 phase (before DNA replication) kidney cells

Answers

Answer:

at the end of the meiosis I

Explanation:

At the end of meiosis I, the resulting number of chromosomes is equal to the number of chromosomes as the original diploid (2n) parent cell. Moreover, at the final of meiosis II, each daughter cell will have half of the number of chromosomes as the original parent cell, i.e., a haploid (n) number of chromosomes. All the somatic cells have a diploid number of chromosomes, while gametic cells have a haploid number of chromosomes. Kidney cells are somatic cells. In humans, each diploid cell contains 46 chromosomes (i.e. 23 pairs of chromosomes), while gametic cells (i.e., egg and spermatic cells) have 23 chromosomes. In consequence, in humans, kidney somatic cells and cells at the final of the meiosis I will have the same number of chromosomes (i.e., 46 chromosomes).

It is known that complex carbohydrates provide more sustained energy over time than simple sugars such as sucrose. Complex carbohydrates are polysaccharides, which are long chains of smaller sugar molecules bonded together. Simple sugars are monosaccharides that contain only one molecule.
Why do complex carbohydrates provide more energy over time versus simple carbohydrates?

Answers

Answer:

Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates

Explanation:

Answer:

A.) Complex carbohydrates have more chemical bonds to break than simple sugars, which takes longer for the body to digest and provides more units of energy for the body to use.

Proof:

the female reproductive and endocrine systems work interactively for which main purpose?​

Answers

Answer: To control hormone levels to prepare the body for pregnancy

Hope this helps!! :)

Answer:

To control hormone levels to prepare the body for pregnancy

Explanation:

Which type of root is important Taproot or fibrous root ? why ?

Answers

Answer:

A tap root system penetrates deep into the soil. In contrast, a fibrous root system is located closer to the soil surface, and forms a dense network of roots that also helps prevent soil erosion (lawn grasses are a good example, as are wheat, rice, and corn).

Explanation:

Answer:

Taproot is found in dicots, while a fibrous root is found in monocots. Fibrous root is found in most grasses, while taproot is not found in most grasses.

Pls help ASAP! This is due today!

Answers

You may have to enlarge it but here you go!

HELP The table below lists some problems associated with four organs of the human digestive system. Which organ is most likely the stomach?

Answers

I think the answer should be 1
A can I get brain list

Seed production and fruit production occurs in the ________ of plants
-PLEASE ANSWER!!!
A. Root System
B. Shoot System
C. Reproductive System

Answers

Answer:

the answer is c

Explanation:

Azariah is trying to describe a wave. Which example would be the best description?
A. two toy cars driving away from each other at the same speed

B. two toy cars driving parallel to each other at the same speed

C. a toy car rear-ending a toy car that then rear-ends another toy car

D. a toy car hitting a wall and bouncing back

Answers

Answer: c

Explanation:

Waves transfers energy

Answer:

c

Explanation:

Which would most likely be found as a petrified fossil form?

frozen mammoth

fish skeleton on the shore

dinosaur skeleton

insects in amber

Answers

Answer:

dinosaur selection  

Explanation:

over time the selection is covered by sediment and is replaced by minerals  

Answer Dinosaur Skeleton

Explanation:

trust me, im big brain

(HELP ME PLEASE ILL GIVE BRAINLIEST)
A medical imaging scan that includes a patient's right lung, heart, and left lung is examined. The scan doesn't indicate in which plane it was taken. Based on the contents of the image, which plane can be ruled out automatically?

A. The sagittal plane
B. The transverse plane
C. The coronal plane
D. The anatomical plane

Answers

Answer:

I believe the answer is C.

The answer is D. the anatomical plane

Autotrophs differ from heterotrophs in that only autotrophs

Answers

Answer:Autotrophs differ from Heterotrophs in one fundamental way what is it

Summary. Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.May 6, 2020

Explanation:

The Rocky Mountains are known for beautiful scenery. Which processes of the Rocky Mountains most likely required the longest period of time to occur?

growth of plants and trees

formation of valleys from glaciers

large uplift of the land from tectonic forces

large accumulation of snow on the mountaintops

Answers

Answer:

Large uplift of land from tectonic forces

Explanation:

The processes of the Rocky Mountains most likely required the longest period of time to occur is large uplift of the land from tectonic forces. Thus, option C is correct.

What are rocks?

When compaction and cementing happens then, a sedimentary rock is made. The rock is made when layers of minerals are stacked upon each other. These minerals include dirt, soil, sand, and other stuff. Overtime these minerals will make the layers that you see in a sedimentary rock. So, the older minerals will be on the bottom while the younger minerals will be on the top.

The Sedimentary rocks refers to the type of rock that is formed from pre-existing rocks or pieces of once-living organisms. They mainly emerged from deposits that accumulate on the Earth's surface and often have distinctive layering or bedding.

The common types of sedimentary rocks include sandstone, limestone, and shale. They often start as sediments carried in rivers and deposited in lakes and oceans and when buried, the sediments lose water and become cemented to form rock.

Therefore, option C is correct.

Learn more about rocks on:

https://brainly.com/question/11473096

#SPJ5

Nutrient rich blood from the instestines flows directly to

Answers

Answer:

Nutrient-rich blood flows into the liver from the intestines through the hepatic portal vein.

Other Questions
This is my last one I need What is the value of y in the picture What makes the nervous system integrative? what term describes the exchange of animals, plants, disease, ideas and culture between European countries and their colonies in Latin America? i need help with this explain it with steps ty Using the map, which statement best describes the land claims in North America prior to the French and Indian War that would eventually lead to the Revolutionary War?1.The Spanish claimed most of the land in North America.2.The British controlled most of the land along the Atlantic Ocean.3.European countries did not claim any land in North America.4.The French claimed the land surrounding the Gulf of Mexico. Dierections:Multiply the following binomials Using the box method or FOIL. you should then combine like terms. your answer Should be in the form of a trinomial. The time it takes for an animal to metabolize a drug to a non-detectable levels could be ____ than that of the withdrawal period A:LongerB:Shorter C:Same time Why is this question Not a research question? In selecting your answer, please consider the three elements of a good research question, and choose the best option.Do iPads make students enjoy class more? 1. It's a yes/no question 2. It is not specific with student description, grade level, or age 3. It is not specific regarding the class 4. All of the above 1. Is the law benefitted the farmers? Why did rabbis become more important in Jewish society after AD 70? Julie opens a bank account with $500. She deposits $60 each month. Write a function that represents thamountthat is in Julie's account after x months. Which symbol and unit of measurement are used for electric current?a. symbol: C; unit: Ab. symbol: 1; unit: CC. symbol: 1; unit: A If Michael can read 400 pages in 8 hours, how many pages can he read in 1 hour? Solve the inequality.5(w - 3) < 5w + 20 You invite your friend to go to Peru. T invitas a tu amigo a ir a Per. T invitan a tu amigo a ir a Per. T invita a tu amigo a ir a Per. T invitamos a tu amigo a ir a Per. Security A: Probability 30% of Return 7%; Probability 50% of Return 12%; Probability of 20% of Return 17%. Security B: Probability 35% of Return 6%; Probability 65% of Return 16% What is the expected return for Security A Lee el prrafo y basado en la lectura, escoge la opcin que contiene lo que sera la siguiente frase. Read the paragraph and based on the reading, choose the option that has what would be the next sentence.Yo viva en La Paz y en Sucre, pero me complace ms la ciudad de Sucre. Es un lugar maravilloso para hacer amigos y conocer el verdadero Bolivia. Es ms pequea, no es muy cara y es muy segura. (1 point)En dos meses, nosotros hemos vivido aqu en Bolivia por 10 aos.En dos meses, nosotros habremos vivido aqu en Bolivia por 10 aos.En dos meses, nosotros vivamos aqu en Bolivia por 10 aos.En dos meses, nosotros vivimos aqu en Bolivia por 10 aos.plz help and only if YOU SPEAK SPANISH What is x when y is 204? Expert Answer Please !Decide If SSS,ASA,AAS,SAS,HL, or None