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3 years ago

How does the semipermeable membrane work?

1 answer:

5 0

When glucose is taken into the cell, the fluids or solutions in the cell become more concentrated (due to the absorbed glucose) than the fluids outside the cell. When this happens, a natural process called osmosis takes place .

Osmosis is defined as the movement of molecules of a solvent (in this case water) through a semi-permeable membrane (in this case the cell membrane) from a less concentrated solution to a more concentrated one in a bid to to equalize the concentration on both sides of the membrane.

<span>Water will therefore leave the less concentrated solution outside the cell, pass through the cell membrane and into the more concentrated solution.</span>

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Most of the energy that your brain uses comes from

evablogger [386]

Answer:

Glucose

Explanation:

The brain is an energy-hungry organ. Despite comprising only 2 percent of the body’s weight, the brain gobbles up more than 20 percent of daily energy intake. Because the brain demands such high amounts of energy, the foods we consume greatly affect brain function, including everything from learning and memory to emotions.

Just like other cells in the body, brain cells use a form of sugar called glucose to fuel cellular activities. This energy comes from the foods we consume daily and is regularly delivered to brain cells (called neurons) through the blood.

Studies suggest the quality of the foods consumed over a lifetime affects the structure and function of the brain. For instance, the consumption of omega-3 fatty acids found in fish provides structural material to maintain neurons. Studies also suggest omega-3 fatty acids are essential for the transmission of information between brain cells. In contrast, foods that are rich in sugars and saturated fats have been found to promote oxidative stress, which leads to damage to cell membranes.

The food you eat also affects molecules in the brain that support cognition. Some foods, such as those with turmeric, support cognition by helping to maintain molecular events related to energy metabolism.

Recent studies suggest lifestyle choices that affect the metabolism of nerve cells, such as diet and exercise, may in some cases provide a non-invasive and effective strategy to counteract neurological and cognitive disorders.

6 0

2 years ago

Imagine you are the nucleus of a plant or animal cell and have been asked to mentor an organelle that is new to the cell. Take y

Ivan

Hi,

I am Nucleus of the cell. I am the most important part of the cell and i have genetic material that is transferred to the offspring upon reproduction. I also supervise many important processes of cell like synthesis of proteins.

I will take you on the trip of our whole cell where you will be able to meet different organelles and know a little about their roles in cell. Let us meet them one by one:

1) Nucleolus: It is a darkish and roundish structure that resides inside me. Its role is in the synthesis of an important type of RNA called ribosomal RNA.

2) Nuclear membrane: This membrane surrounds me and is contains small pores for the movement of ribosomal RNA and proteins. Due to this surrounding DNA stays inside me and donot leaves me.

3) Golgi Complex: This is like a packaging and storing organelle of cell that processes and packs the proteins and exports them outsise or inside the cell. Their secretions include digestive glands, saliva, oils etc.

4) Rough Endoplasmic Reticulum: It consists of several long canals that form a series running throughout the cell and contains ribosomes attached with them. They are the organelles which transport proteins to the golgi complex for their packaging.

5) Smooth Endoplasmic Reticulum: It has an important role in the detoxification process converting toxic substances into less toxic forms. They are in structure similar to rough endoplasmic reticulum except that they donot have ribosomes attached to them.

6: Centrioles: They are important in the process of cell division and are present in animal cells only.

7:Mitochondria: This is called as power house of the cell because all the processes that convert food into energy take place in this part. You can see it has two membranes outer is smototh while inner forms foldings.

8: Ribosomes and Free Ribosomes- They are freely floating in the cell or attached with endoplasmic reticulum, They have role in protein synthesis.

9: Lysosomes: They have an important function because they remove worn out and old organelles by digesting them. Therefore, they contain good digestive enzymes.

Hope it helps!

8 0

3 years ago

"In genetic modifications, DNA inserted can come from _____ ." any organism containing the DNA of interest only the same plasmid

liq [111]

Answer:

<h2> any organism containing the DNA of interest</h2>

Explanation:

Such type of process in which the modification of the genes of the organisms takes place is known as genetic modification and also called genetic manipulation or genetic engineering.
In such type of the process, the branch of biological science that is known as biotechnology is used.
In this mechanism, genes of interest are separated from the certain organism and then this gene of interest is inserted into the host organism and such type of DNA that is formed after the addition of foreign genes or DNA is called recombinant DNA.
Such type of DNA is used in the production of genetically modified organisms and some other fields for the benefit of human beings.

8 0

3 years ago

Why is there a thermocline in ocean waters?

Rom4ik [11]

Water pressure and temperature varies at different depths of the ocean.

8 0

3 years ago

Binary ionic compounds are named in what pattern

Andre45 [30]

Binary ionic compounds are named in the pattern of metal, then nonmetal.

I hoped this helped.

3 0

3 years ago