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neonofarm [45]
3 years ago
15

What are the different junctions in animal cells? Plant cells? Which junctions in plant and animal cells are similar? Which junc

tions in plant and animal cells are similar?
Biology
1 answer:
Allisa [31]3 years ago
3 0

Answer:

The different junctions in animal cells are tight junction, gap junction, and desmosomes.

Explanation:

The different cells are joined by cell junctions. The major functions of cell junction are communication between the cells. In animal cells, there are 3 types of cells - tight cells, gap junctions, and desmosomes.  

The tight junctions are watertight seals. This does not allow any water or ions to pass through the cells. The gap junctions are present in epithelial tissue organs such as lungs, bladder, intestine, stomach, and kidneys.

The gap junctions are connective channels between 2 cells. This allows the ions, water, and other molecules to pass between the cells. The gap junctions are present in the cardiac muscles. Here it allows the passage of calcium ions and helps in the action potential.

Desmosomes connect 2 cells along with the microfilaments. This is composed of keratin. It helps in holding 2 or more cells tightly. Due to desmosomes tissues can be stretched.  

e.g. skin, intestines.

In-plant cells the 2 cells are joined by plasmodesmata. This arises from the middle lamella. It is also a channel-like structure that connects the protoplasm of 2 cells. The ions and other molecules pass between the plant cells by plasmodesmata.  

The plasmodesmata and gap junctions are similar. They both help in cell communication in plants and animals and transport ions, molecules.

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What is the difference between bactericidal and bacteriostatic agents?
torisob [31]
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How the seismic tracings recorded at station A and station B indicate that station A is farther from the earthquake epicenter th
VMariaS [17]

The seismic traces recorded at station A and station B indicate that station A is further from the earthquake epicenter than station B because the ground movement detected at B was greater than that detected at A, with seismic waves more frequent and less frequent respectively.

<h3>Seismograph</h3>

A seismograph is a device that detects ground movements, including those generated by seismic waves. It consists of the basic sensor of the seismographic instruments of which the seismograph and the seismoscope are part. These movements are then recorded in seismographs, which have been plotted graphs called seismographs.

<h3> Propagation speed</h3>

Seismic station A is located 5,400 kilometers from the earthquake's epicenter. How long would it take for the first S wave produced by this earthquake to reach seismic station A? The propagation speed of this type of waves varies with the medium in which they propagate, with typical values ​​of

  • 330 m/s in air
  • 1 450 m/s in water
  • and 5 000 m/s in granite.

They are not as destructive as S waves or the surface waves that follow them. The propagation speed of these waves is, in general, slightly less than twice that of S waves.

With this information, we can conclude the velocity of propagation of seismic waves and how a seismograph enumerates the distance from the epicenter of an earthquake.

Learn more about Earthquake in brainly.com/question/1296104

3 0
2 years ago
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