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Butoxors [25]
3 years ago
13

GIVE ME THE DEFINITION OF DIFFUSION

Biology
1 answer:
Alex777 [14]3 years ago
8 0
The definition of Diffusion is: The movement of molecules from a high concentration to a low concentration. Many molecules diffuse across cell membranes.

I know this because I looked it up in my science text book and did some research online.

Hope I helped!

- Debbie
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Indicate whether each of the following descriptions is true of microtubules (MT), microfilaments (MF), intermediate filaments (I
qwelly [4]

Answer:

(a) Microfilaments

(b) Microtubules

(c) Microtubules

(d) Microfilaments

(e) Intermediate filaments

(f) Microfilaments, intermediate filaments, microtubules

(g) Microfilaments, microtubules

(h) Microfilaments, intermediate filaments, microtubules

(i) Microtubules, microfilaments

(j) Microtubules

Explanation:

Microtubules (MTs) are dimers of the protein tubulin (alpha- and beta-tubulin subunits) and they are major components of the cytoskeleton. MTs play diverse cellular roles including, mechanical support (cytoskeleton), transport, motility, chromosome segregation, etc. Microfilaments (MFs) are protein filaments that also form part of the cytoskeleton in eukaryotic cells. MFs consist of G-actin monomers assembled in linear actin polymers, and their functions include mechanical support, cytokinesis, changes in cell shape, amoeboid movement, endocytosis and exocytosis, etc. MFs associate with the protein myosin to generate muscle contractions. Actin filaments/MTs assembly from monomeric actin/tubulin is caused due to energy expenditure, where ATP/GTP bound to actin/tubulin is hydrolyzed during polymerization. Finally, intermediate filaments (IFs) are a type of cytoskeletal element composed of a heterogeneous group of structural elements, and they are not found in all eukaryotes. The primary function of the IFs is to contribute to the mechanical support for the plasma membrane where these filaments come into contact with other cells and/or with the extracellular matrix. The IFs are not directly involved in cell movement. All 3 types of cytoskeletal elements (microfilaments, intermediate filaments, microtubules) can be visualized by fluorescence microscopy when cells express chimeric MT/IF/MF.–GFP fusion proteins.

8 0
3 years ago
What is 6.9 × 107 written in standard form?
erastovalidia [21]
10^7 would be 69000000. You do this by moving the decimal by the number of powers on the 10.
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3 years ago
Which of the following is NOT a function of membrane proteins?a.Transport molecules across the membrane.b.Transmit extracellular
olga2289 [7]

Answer:

The answer is D) Generate the energy required for lipids to diffuse through the membrane.

Explanation:

Membrane proteins don't produce energy in any required process inside the cell. Therefore, is not a function to generate the energy that lipids require to diffuse to the membrane. Although membrane proteins develop many functions, producing energy isn't one of them.

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3 years ago
A client's laboratory findings showed increase in serum alkaline phosphatase and urinary hydroxyproline levels. which condition
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<span>The nurse will most likely observe Paget's disease on the client's medical chart. Paget's disease interferes with the body's bone tissue recycling process and results in increased blood flow around affected bones, flushing extra alkaline phosphatase and urinary hydroxyproline from the body.</span>
7 0
3 years ago
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Cells are combined in a structure called tissue wich have the same properties like the cells wich are formed by.
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