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lubasha [3.4K]
3 years ago
8

Explain the theory of plate tectonics and how they changed Earth's surface over time. Include the role of plate tectonics

Biology
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.

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Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect
kolezko [41]

Complete question:

Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect gene expression. Which effector pathway is characterized by ion flux through transmitter-activated channels resulting in an altered membrane potential and neuronal activity?

A.  Slow effector pathways

B.  Modulated effector pathways

C.  Rapid effector pathways

D.  NMDA glutamate receptor pathways

Answer:

D.  NMDA glutamate receptor pathways

Explanation:

The NMDA glutamatergic receptor is a cationic channel receptor modulated by a ligand that allows the transport of Na+, K+, and Ca2+. Under certain situations, it exhibits particular permeability to Ca2+. The receptor has different regions that are susceptible to modulation by endogenous and exogenous agents. The receptor can be found at most excitatory synapses, where it responds to the neurotransmitter glutamate. During synapsis, the presynaptic membrane releases L-glutamate, which is received by NMDA glutamatergic receptor. The receptor plays a regulatory role because activates signaling cascades that depend on calcium.

These receptors are involved in normal synaptic transmission, in a diverse physiological phenomenon, and might be responsible for neurodegenerative processes.

3 0
3 years ago
What should students ALWAYS wear in the science laboratory? A) gloves B) slippers C) contact lenses D) safety goggles
VladimirAG [237]
You should always suppose to have safety goggles because you don't want to hurt your eyes
8 0
3 years ago
In a closed system, the total energy prior to an energy transformation is _______ the total energy after. A. equal to B. unrelat
nikklg [1K]
Hey there mate!

Based on my information to this, I believe sense (it would be a closed system), this would most likely be considered to be (equal to) the total energy after.

But, if it was not a (closed system), it would not be unrelated because the energetic system would not be that greatly increased.

So, it really depends whether the system closes up, or whether it would be free of energy.

So, in this case, your correct option to this answer would be (option A).

<span>In a closed system, the total energy prior to an energy transformation is unrelated to the total energy after. 

I hope this helps you!</span>
6 0
3 years ago
Read 2 more answers
Large molecules made of many small subunits called
umka21 [38]

Answer:

Large molecules made up of many small organic molecules that are often referred to as monomers. Macromolecules are polymers of monomers.

sorry if I am wrong

3 0
3 years ago
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Hey please help<br><br>is a solar eclipse local or global?<br>is a lunar eclipse local of global?​
Vlada [557]

Answer:

A solar eclipse is  Local

A lunar eclipse is global

Explanation:

3 0
3 years ago
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