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3 years ago

Movement is a characteristic of a living thing. Discuss

Biology

1 answer:

DerKrebs [107]3 years ago

6 0

Answer:

All living organisms show movement of one kind or another. All living organisms have internal movement, which means that they have the ability of moving substances from one part of their body to another.

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(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter

Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport. 

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There are three main different types of transport across the membrane

Simple diffusion ⇒ Does not need energy to occur
Facilitated transport ⇒ Does not need energy to occur
Active transport ⇒ Needs energy to occur

Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

The cells maintain a 120 mM intracellular concentration of substance L.

Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

External concentration of substance(mM) Rate of entry of substance L

10 5%

20 25%

30 45%

40 65%

50 80%

60 90%

70 95%

80 100%

90 100%

100 100%

Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.

Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

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3 years ago

Which 2 simple machines make up a latchkey

Anarel [89]

Answer:

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2 years ago

List all four body systems that make up the excretory system and give an example of how each body system eliminates waste.

mart [117]

Answer:

Organs of excretion make up the excretory system.

They include the :

kidneys-Blood by-products are filtered out by the kidneys and leave the body in urine form. They are part of the urinary system, which also includes the ureters, bladder, and urethra

large intestine-By-products enter the intestine and leave the body in the form of feces

liver- breaks down harmful substances. It's by-products are excreted into bile or blood.

skin-Sweating eliminates excess water and salts, as well as a small amount of urea, a byproduct of protein catabolism

lungs- oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled

Hope this helps!!!!!!

Forever friend and helper,

Cammie :)

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3 years ago

Gustatory hairs are to taste as olfactory hairs are to? select one:

lbvjy [14]

smell, the taste is 80% smell... smell picked up by olfactory receptor cells.

8 0

3 years ago

Read 2 more answers

Once an experiment is complete which of the following is not a step to be taken with the data

Mashutka [201]

Your answer would be D

Hope this helps

6 0

2 years ago

Movement is a characteristic of a living thing. Discuss​

Movement is a characteristic of a living thing. Discuss