All categories

2 years ago

PLS HELP 20 PTS

Biology

1 answer:

wariber [46]2 years ago

4 0

Explanation:

The real magnitude of this challenge can perhaps be best judged by considering the structural and functional complexity of the human brain and the bewildering complexity of human behavior. The human brain is thought to be composed of about a hundred billion (1011) nerve cells and about 10 to 50 times that number of supporting elements or glial cells. Some nerve cells have relatively few connections with other neurons or with such effector organs as muscles or glands, but the great majority receive connections from thousands of other cells and may themselves connect with several hundred other neurons. This means that at a fairly conservative estimate the total number of functional connections (known as synapses) within the human brain is on the order of a hundred trillion (1014). But what is most important is that these connections are not random or indiscriminate:

They constitute the essential "wiring" of the nervous system on which the extraordinarily precise functioning of the brain depends. We owe to the great neuroanatomists of the last century, and especially to Ramón y Cajal, the brilliant insight that cells with basically similar properties are able to produce very different actions because they are connected to each other and to the sensory receptors and effector organs of the body in different ways. One major objective of modern neuroscience is therefore to unravel the patterns of connections within the nervous system—in a word, to map the brain.

You might be interested in

How can prokaryotic cells be smaller than eukaryotic cells and still carry on all the functions of life?

user100 [1]

Thcfcxxfxfxfxfxfxrxesdtfghbvcxdfgvcxdfvcxdfgvcdfgv

4 0

2 years ago

Which of the following best describes how behavioral isolation can prevent two species from interbreeding?

Maksim231197 [3]

Answer:

Explanation:

I think it is 3 because all other ones don't effect all types of species while three makes the most sense

6 0

3 years ago

WITCHER [35]

Answer:

protons is 7 neutrons should be 9

Explanation:

protons number is its atomic number

the number of protons and the number of neutrons determine an element's mass number.

8 0

2 years ago

One characteristic that distinguishes a population in an extinction vortex from most other populations is that (A) it is a rare,

miv72 [106K]

(C) its genetic diversity is very low.

<h3>What is meaning of Extinction?</h3>

Extinction is the final phase of a sort of creature or a taxon—typically a species. Although the ability to reproduce and bounce back may have been lost earlier, the death of the last member of the species is typically considered to be the moment of extinction.

Determining this point is challenging because a species' potential range may be quite wide, and is typically done after the fact. Due to this problem, there are phenomena like Lazarus taxa, in which a species that was thought to be extinct suddenly "reappears" after a period of apparent absence (usually in the fossil record). Estimates place the number of extinct species at over five billion, or more than 99% of all species that have ever existed on Earth.

Learn more about extinction with the help of the given link:

brainly.com/question/27207648

#SPJ4

6 0

1 year ago

If you wanted to design an artificial hormone who's action on a target cell required the least amount of interaction with that c

vitfil [10]

Answer:

The water soluble hormones affect the target cells with least amount of interaction.

Explanation:

Hormones are the chemical messengers. These are the substances secreted by the endocrine glands. The hormones are secreted directly into the bloodstream and are carried to the target cells within the blood only.

Based on their structure, hormones are water-soluble or lipid-soluble. The lipid-soluble hormones are steroid hormones and thyroid hormones. These hormones can easily pass through the lipid bilayer of the cell membrane of the target cell. Therefore, the lipid-soluble hormones have intracellular receptors that are present in either cytoplasm or the nucleus of the target cells.

On the other hand, the water-soluble hormones can not pass through the lipid bilayer of the target cells. Therefore, these hormones have extracellular receptors on the surface of the target cells. Binding of the water-soluble hormones to their cell surface receptors triggers the production of the intracellular second messengers that finally carry the signal to the target protein or any other target molecule.

<u>Therefore, a water-soluble hormone exhibits the least amount of interaction with the target cell. Amine hormones such as epinephrine and melatonin, peptide hormones such as oxytocin are some examples of the water-soluble hormones. </u>

8 0

2 years ago