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Ad libitum [116K]
2 years ago
8

What action is directly responsible for the generation of an action potential at the sarcolemma?

Biology
1 answer:
Over [174]2 years ago
7 0

Answer:

Nervous stimulus action for muscle contraction

Explanation:

Nerve stimulation is sent to the sarcolemma, which are motor nerves at the neuromuscular junction (junction between the terminal part of a motor axon with a motor plate), after which nerve endings implant in the sarcolemma and form plaque on the surface of muscle fibers, which in turn transmit stimulus to the musculature.

Then, an electrical current (from the stimuli) is generated, it propagates through the muscle cell membrane, reaches the cytoplasm and triggers the muscle contraction mechanism.

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Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
expeople1 [14]

Answer

a balance and a graduated cylinder

Explanation

Density is mass per unit and it is property  characteristic of a substance. The arrangement of the mass of atoms and their size is what determines the the density of a substance.

For a student to measure the density of seawater  he/she is required to use a balance and a graduated cylinder where a balance will be used to measure the mass of the mineral sample  and then a graduated cylinder to determine the volume.


7 0
3 years ago
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The argument that each individual member of a species transforms itself to meet the challenges of a changed environment through
svlad2 [7]

Answer:

Jean Baptiste de Lamarck

Explanation:

i found this online

8 0
2 years ago
22) Phosphorus and sulfur are returned to the soil primarily by the actions of
Fudgin [204]
I believe the answer is decomposers. Does that make sense in the context of what you have learned in class? If you look up "the circle of phosphorous," you can see images that show that decomposers, like fungi and microbes break down dead animals and plants using some of their phosphorous, but what isn't used is returned to the soil. The same can be said for sulfur. Decomposers like fungi and bacteria break down dead plants and animals and return sulfur to the soil. 

I want to warn you that there is a slight possibility that I might be incorrect. I am still pretty sure I am right. The only thing that makes me question the correctness of my answer is another brainily question I saw when i was looking up this stuff. Two people had responded to that Middle schoolers question and had said the answer was producers. They didn't give any explanation for their answers. So, I am confused as to how they both got the same answer that was different from mine.  No material that I have seen regarding either the phosphorous cycle or sulfur cycle has shown plants as RETURNING the most sulfur and phosphorous into the soil. Usually, it has been depicted that producers, such as plants, UTILIZE the most phosphorous and Sulfur from the soil.
5 0
2 years ago
7. Predict: How do you think a period of hot summers will affect the rabbit population?
Assoli18 [71]
I think a period of hot summers will affect the rabbit population in a positive way. This is because it will allow the population to increase in size, and get ready for the harsh weather to come throughout the rest of the year.
8 0
3 years ago
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How many americans suffer health disorders each year from smoking tobacco?
aev [14]
More than 16 million Americans
6 0
3 years ago
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