Answer:
Lipid bilayer can be defined as a polar membrane, which composes two layers, made up of lipid molecules. It shows both hydrophobic (due to non-polar tails of lipid molecules) and hydrophilic (due to polar heads of lipid molecules) nature, and hence is known as of amphipathic nature.
Lipid bilayer shows selective permeability as not all molecules can cross the lipid bilayer. It can pass non-polar, small, uncharged molecules due to its hydrophobic core, such as oxygen, water, urea.
On the other hand, polar, large, or charged molecules, such as glucose, amino acids, and ions cannot pass through lipid bilayer. These molecules require transport proteins for their transport, which are embedded in lipid bilayer.
he lipid bilayer has unique properties. They are formed in sheet-like structures that contain both a hydrophilic and a hydrophobic moiety. The membrane is composed of lipids and proteins and sometimes even carbohydrates. There are two different membrane proteins in the lipid bilayer.
Plants affect physiological and psychological response in that, when plants are present, human beings they have no stress and they are more attentive more than when there are no plants.
Physiological response is termed as an automatic reaction which drives physical response to stimulus. For example, stress.
They respond to empathy and express of emotions in post stress communication.
Psychological responses are the reactions, symptoms, and signs which may lead to crisis or even to a traumatic event they respond to stimuli.
Answer:
What proteins,DNA, fat and sugar have in common is that they are biomolecules, or organic molecules, which all contain carbon and are necessary for the vital functions of living beings.
Explanation:
The principal biomolecules of living beings are proteins, carbohydrates or sugars, lipids and nucleic acids, such as DNA. All these molecules contain carbon in their composition and have hydrocarbon structures that may also have oxygen, nitrogen, sulfur and phosphorus in their composition.
Each of these biomolecules has a specific function and is indispensable for the development of life:
- <em><u>Proteins</u></em><em>: they are composed of amino acids and participate in the constitution of tissues, metabolic processes and the regulation of organic functions.
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- <em><u>Carbohydrates</u></em><em>: they are the main energy substrate, participating in the metabolism that leads to obtaining ATP.
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- <em><u>Lipids</u></em><em>: they are the main constituent of cell membranes, as well as constituting other organic molecules and being a reserve energy source.
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- <em><u>Nucleic acids</u></em><em>: DNA and RNA participate in the process of storage and transmission of genetic information, being responsible for processes such as the synthesis of proteins and other molecules.
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<u>The characteristics that have in common proteins, DNA, lipids and carbohydrates are their carbon-based composition, being organic molecules and being essential for living beings</u>.
Answer:
This is because the voltage gated sodium channels which opens for the influx of sodium ions, which caused increased postivity of the axoplasm closed, with simultaneous opening of potassium channels.
Therefore depolarization stopped, thus propagation and transmission of action potential (caused by depolarization) which cause the reversal of charges in the membrane (making the axoplasm more negative) for the voltage rise to 40mV also stopped.
In addition the simultaneous opening of voltage gated potassium channels caused K+ to leave the axoplasm to the external environments. This makes the inner membrane to be negative further lowering the potential, to -75mv. This is re-polarization.
Explanation:
Answer:
twilight
it is mixed of worda nouturnal and diurnal
