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Dennis_Churaev [7]
3 years ago
9

Describing the action potential and its phases

Biology
1 answer:
Evgen [1.6K]3 years ago
3 0

An action potential is caused by either threshold or suprathreshold stimuli upon a neuron. It consists of four phases; hypopolarization, depolarization, overshoot, and repolarization. An action potential propagates along the cell membrane of an axon until it reaches the terminal button.

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how do mosses, ferns, gymnosperms, and angiosperms reproduce? general ideas with similarities and differences is what we’re look
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Answer:

angiosperms and gymnosperms away from water, mosses and ferns with water

Explanation:

Pollen allows angiosperms and gymnosperms to reproduce away from water, unlike mosses and ferns which require water for sperm to swim to the female gametophyte.

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3 years ago
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Which statement about ocean surface currents is false
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B: "They have no effect on air temperature over land on the coast."

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Edg 2021

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2. When diffusion has reached equilibrium, we say that
madam [21]

Answer:

See Below.

Explanation:

The key word here is <em>net. </em>The net movement has reached zero when a system is in equilibrium but there are still motion's going back and forth due to statistics and just random brownian motion.

Think of it this way, if there are 100 people walking forwards in a crowd but 2 are moving against the crowd, the net movement is still forwards because the bulk of people are going in that direction. However, there are still 2 people moving against.

Same here, if we are talking about a diffusion, let's say in the case of osmosis, if most of the solute is moving across a membrane then we'd say its net direction is that way but that doesn't mean that there aren't processes happening in the other direction. Water molecules in osmosis mostly diffuse, chemically speaking (because you can say this biologically in a different way), from the probability of water molecules colliding with each other and passing the membrane so even if there is a net movement in a certain way their random motion can make them go to the other side just as well. If the fact that motion stops at equilibrium were the case a lot of systems, both chemical and biological, would not exist as we know it.

Think net = bulk <u>NOT</u> <em>total</em> or <em>entire.</em>

8 0
3 years ago
Mendel formulated his principles of inheritance based on _____.
Snezhnost [94]
<span>observations on the outcomes of breeding experiments. </span>
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Which question is a testable
podryga [215]

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A testable question is one that can be answered by designing and conducting an experiment. The answers to a testable question can be observed and measured. Hypothesis- a testable explanation of an observation. A hypothesis is NOT just an educated guess about what you think will happen.

3 0
2 years ago
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