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jenyasd209 [6]
3 years ago
11

Which element in lava is responsible for preserving the direction of the magnetic fields? (1 point)

Biology
1 answer:
Tcecarenko [31]3 years ago
6 0

A. Iron-titanium oxide helps preserve the direction of magnetic fields

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What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
Sliva [168]

Answer: The diffusion of ions along the axoplasm is faster,in myelinated compare to unmyelinated,

Neurons are the structural and functioning units of nervous system.They are the vehicles for transmission of impulses as electrical signals from one part of the cells,and from one part of the body to another.

The basic structural components of a typical neuron are the cellbody, the axon, and the dendrites.

Based on structure neurons are classified as myelinated and unmyelinated.This is based on the the surrounding layer of myelin sheath around the axon. The myelin provides the insulating layer for the axon.And ensures fast movement of impluses.

In myelinated neurons the myelin sheath are interrupted at intervals by gaps along the length of the axon called Nodes of Ranvier. These gaps contains more Na-K channels for influx and out-flux of K and Na+ ions for transmission of impulses.

The cytoplasm of axon is called axoplasm,Since this is surrounded by myelin sheath which contains Na-K+ channels,The rate of diffusion of ions along  these channels is faster for depolarization to take place than in unmyelinated neurons. Inaddtion as these ions  diffusion increases,its jump faster at the nodes of Ranvier (saltatory conduction) to the next axoplasm which further speed up the rate of transmission.

Unmyeinated lacks myelin sheath,therefore the exchange and  the rate of diffusion of ions along the axons is low.

Explnation:

6 0
3 years ago
IF most of the energy we use on earth comes from the sun –how does that energy (light and thermal) end up
____ [38]

Answer:

1: Chemical Energy

2: Kinetic Energy

3: Electrical Energy

4: Mechanical Energy

Explanation:

1: The energy held in food is called <em>chemical energy. </em>It is a form of <u>potential energy</u> held within chemical bonds between atoms.

2: When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the <em>kinetic energy of flowing water</em> <u>as it moves downstream.</u>

3: The power for lights and stuff is <em>Electrical</em><em> </em><em>Energy</em><em>,</em> ofc :]

4: The <u>chemical energy in the food</u> gets changed into the <em>mechanical energy</em> of <u>moving muscles.</u>

<u>Hope</u><u> </u><u>this</u><u> </u><u>helps</u><u>!</u><u>!</u><u> </u><u>:</u><u>D</u>

5 0
3 years ago
What on a bird besides its feet is chemically similar to scales?
Elina [12.6K]
Would it be its beak? It's hard and protective like scales

5 0
3 years ago
Read 2 more answers
Human red blood cells that lack sufficient hemoglobin would have a low amount of what substance?
lisabon 2012 [21]

If a human’s red blood cells will lack sufficient amount of hemoglobin, he or she would have also a low amount of oxygen.

Hemoglobin is what makes the red blood cells red in color, aside from the abnormal color, the red blood cells also make up of oxygen.  It can also be with iron since iron is bind to hemoglobin all the way to the lungs.

6 0
3 years ago
Which of the following is the correct sequence in which a DNA sequence is used to produce a protein?
mrs_skeptik [129]
C of course
C is the answer
4 0
2 years ago
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