When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy, the process is best described as: A. Facilitated diffusion B. active transport C. pinocytosis D. the work of an ion pump E. Osmosis

1 answer
Question:

When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy, the process is best described as:
A. Facilitated diffusion
B. active transport
C. pinocytosis
D. the work of an ion pump
E. Osmosis

Answers

Answer:A. Facilitated diffusion Explanation:The plasma membrane is an important membrane that is present in the cell and plays an important role in the exchange of the materials across the cell. This membrane is made up of phospholipid bilayers and some other components. Movement of the substances across the membrane takes place by two methods such as an active process in which the energy required and the other is the passive process in which energy is not required.Diffusion, osmosis, and facilitated diffusion are an example of passive diffusion. Facilitated diffusion is such type of passive movement in which the membrane proteins helps in the transport of the substances across the membrane and thus the is faster than other passive processes. In this process no energy is required and movements take place along the concentration gradient.

Similar Solved Questions

2 answers

1.) La _____ es una serie de televisión. Los programas son muy populares en los países latinos. -programa de noticias -programa de cocina - telenovela 2.) En el cuento “Sleeping Beauty” (La Bella Durmiente) las _____ ayudaban a la princesa. Ellas podían volar y hacer magia. -enanos -piratas -hadas

1.) La _____ es una serie de televisión. Los programas son muy populares en los países latinos. -programa de noticias -programa de cocina - telenovela 2.) En el cuento “Sleeping Beauty” (La Bella Durmiente) las _____ ayudaban a la princesa. Ellas podían volar y hacer magia. -enanos -piratas -...
2 answers

The ratio 25:45 in simplest form is 5:9 5:8 9:5

The ratio 25:45 in simplest form is 5:9 5:8 9:5...
2 answers

Simon is very interested in his neighbor Sally but has anxiety about his attraction to her because his friends would not approve. Every time he sees her, he acts very rude and says mean things to her, despite his intense attraction to her. This is an example of what type of defense mechanism?

Simon is very interested in his neighbor Sally but has anxiety about his attraction to her because his friends would not approve. Every time he sees her, he acts very rude and says mean things to her, despite his intense attraction to her. This is an example of what type of defense mechanism?...
1 answer

Used to flavor vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest amount. The threshold limit is 2.0 x 10-11 g per liter of air. If the current price of 50.0 g of vanillin is $104, determine the cost to supply enough vanillin so that the aroma could be detected in a large aircraft hangar with a volume of 5.95 x 107 ft. Guided Solution

used to flavor vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest amount. The threshold limit is 2.0 x 10-11 g per liter of air. If the current price of 50.0 g of vanillin is $104, determine the cost to supply enough vanillin so that the aroma coul...
1 answer

Help would be much appreciated. Please show all workings :)

help would be much appreciated. Please show all workings :)...
2 answers

You are rolling two dice at the same time. what is the probability of a rolling a sum of 5 or 9?

you are rolling two dice at the same time. what is the probability of a rolling a sum of 5 or 9?...
2 answers

What is the value of x in this figure? 14√3 28√3 28√2 28

What is the value of x in this figure? 14√3 28√3 28√2 28...
1 answer

How can you tell if a number is divisible by 3? a. the first two digits are divisible by 3. b. the sum of the digits of the number is a multiple of 3. c. the number ends in an odd digit. d. the last number is 3.

how can you tell if a number is divisible by 3? a. the first two digits are divisible by 3. b. the sum of the digits of the number is a multiple of 3. c. the number ends in an odd digit. d. the last number is 3....
1 answer

System of government in which the citizens elect representatives. However, the elected representatives choose the _________ ____________ who is the executive authority of the country.

System of government in which the citizens elect representatives. However, the elected representatives choose the _________ ____________ who is the executive authority of the country....
2 answers

Why did the style of Mount St Helen's eruptions change from explosive to effusive?

Why did the style of Mount St Helen's eruptions change from explosive to effusive?...
2 answers

Explain how the atomic theory was modified from Dalton’s theory to Rutherford’s. Include an explanation of why the theory was modified.

Explain how the atomic theory was modified from Dalton’s theory to Rutherford’s. Include an explanation of why the theory was modified....
1 answer

What are the continents of North America

What are the continents of North America...
2 answers

In response to Duracell's introduction of the Duracell Ultra battery, Energizer introduced an Advanced Formula battery. But unlike Duracell, Energizer priced its batteries at a low initial price, believing that consumers were too price sensitive to pay more in this category. In this case, Energizer used ___.A. penetration pricing.B.prestige pricing.C. skimming pricing.D. price lining.E. cost-plus-fixed-fee pricing.

In response to Duracell's introduction of the Duracell Ultra battery, Energizer introduced an Advanced Formula battery. But unlike Duracell, Energizer priced its batteries at a low initial price, believing that consumers were too price sensitive to pay more in this category. In this case, Energizer ...
2 answers

The legal rights of Englishmen influenced the colonists to _____. expect a voice in their government give more power to the monarchy support the Navigation Acts believe in the separation of powers

The legal rights of Englishmen influenced the colonists to _____. expect a voice in their government give more power to the monarchy support the Navigation Acts believe in the separation of powers...
1 answer

Calculate the distance the Aleutian Island chain is from the convergent plate boundary.

Calculate the distance the Aleutian Island chain is from the convergent plate boundary....
1 answer

Please help me with this!!

Please help me with this!!...
1 answer

Bellingham Inc had the following activity last year: Sales $300,000; Cost of goods sold $170,000; Depreciation expense $25,000; other selling and administrative expenses $95,000; income tax expense $3,000. What was the estimated net cash flow for the year?

Bellingham Inc had the following activity last year: Sales $300,000; Cost of goods sold $170,000; Depreciation expense $25,000; other selling and administrative expenses $95,000; income tax expense $3,000. What was the estimated net cash flow for the year?...
1 answer

What must the pea and lettuce plants take up through their roots to perfum photosynthesis

What must the pea and lettuce plants take up through their roots to perfum photosynthesis...
2 answers

In addition to water and carbon dioxide, photosynthesis requires_____. A. Light and chlorophyll. B. Oxygen and sugars. C. Sugars and light. D. Chlorophyll and oxygen.

In addition to water and carbon dioxide, photosynthesis requires_____. A. Light and chlorophyll. B. Oxygen and sugars. C. Sugars and light. D. Chlorophyll and oxygen....
1 answer

14.4 suppose you start with the dna strand accgtcact what three amino acids does the complementary mrna strand code for

14.4 suppose you start with the dna strand accgtcact what three amino acids does the complementary mrna strand code for...

-- 0.039041--