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Nookie1986 [14]
3 years ago
12

Four contributing factors that may lead to an increase of learners abusing substances at schools​

Biology
1 answer:
Fynjy0 [20]3 years ago
7 0
Hi how are you doing today Jasmine
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What causes the refractory period in sodium channels after an action potential has been initiated? The sodium channel CANNOT be
harkovskaia [24]

Answer:

Explanation:

This is because once a Voltage Gated Sodium Channels closes up after depolarization, they can not be reopened.The  transmission  of action potential is such a way that  they are propagated one after the other in a forward direction, and never backwards. Thus once a sodium channel depolarizes,it closes up,  to under go a shot rest.No matter the strength of the next stimulus it will not open. Then the channel ahead of it opens to depolarise  to conduct action  potential, this again after shut opening closes up for the channel ahead to open.  This short period of rest when the sodium channels closes up  is called refractive period.  However after sometime of rest the rested sodium channels open, from the inactivated stage to conduct action potential.

4 0
3 years ago
What constitutes the majority of the debris found in the “garbage patch" located in the North Pacific Ocean?
mezya [45]

Answer:

Old Fishing Gear

Explanation:

The patch, in fact, is made up mostly of abandoned fishing gear. According to the study, fishing nets alone make up 46 percent of the 79,000 tons of garbage.

3 0
3 years ago
Why are phrases such as tongue twisters, so hard to pronounce?<br> Please explain specifically.
zheka24 [161]
Simple, Your BRAIN can only process so much, so the signal to your vocal cords and tongue slow and You mess up Example:
 

SAY PETER Piper picked a pack a pickle peppers 8x

Did you mess up? I bet so

also here an easy one. RUBER BABY BUGGY BUMPER  
5 0
3 years ago
What is a hydrogen atom and carbon atom? <br> What are elements?
Anna71 [15]

Answer:

A hydrogen atom is an atom of the chemical element hydrogen.Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.

In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.

Explanation:

3 0
3 years ago
When plates slide past each other, the edges of these plate blank zones
atroni [7]

Answer:

A. Earthquake

Explanation:

When plates slide past each other, the edges of these are earthquake zones. Earthquakes are formed but not volcanoes.

8 0
3 years ago
Read 2 more answers
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