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3 years ago

Whyshould humans save endangered animals from extinction?

Biology

2 answers:

GREYUIT [131]3 years ago

7 0

They are important to other organisms which are important to us. Think "food chain"

AnnZ [28]3 years ago

5 0

When any animal becomes extinct reguardless of its position in the food chain there is a trickling affect to all other links, creating overpopulation and over kill of other species now that the habitat balance has become skewed. Having one species become extinct will cause further issues a for other species down the road.

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A height above sea level of a point on surface is known as its?

Tcecarenko [31]

Elevation because it means the level of a point surface height above the sea level

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3 years ago

Read 2 more answers

Que es el daltonismo

otez555 [7]

Answer:

Una capacidad reducida para distinguir entre ciertos colores.

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2 years ago

___ is usually expressed as the number of deaths per 1000 people per year.

Anastasy [175]

Answer should be death rate

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2 years ago

Biochemical function within any cell is determined largely by specific enzymes. Remember, enzymes are proteins. Different sets o

Tatiana [17]

Answer:

This is how cells gene regulation occur.

Explanation:

Regulation of gene expression is very very important thing to maintain the normal levels of all body proteins according to our body"s requirement.

During positive gene regulation enzymes of various metabolic pathways of the target cell is being activated,thus supplying the cellular need of various metabolites and proteins.

During negative regulation various enzymes are turned off thus blocking the formation of metabolites or proteins not required by the cell.

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3 years ago

Correctly identify each of these definitions or examples as either depolarization or hyperpolarization of the plasma membrane. 1

natulia [17]

Answer:

hyperpolarization
depolarization
hyperpolarization
depolarization
hyperpolarization
depolarization
depolarization

Explanation:

The resting membrane potential is balanced by ion leakage and ion pumping, to get an electrical signal started the membrane potential has to lose its balance. This starts with a membrane channel opening for Na+ since Na+ concentration is higher outside the cell, ions will rush into the cell. This will change the relative voltage inside the cell. The resting potential has a voltage of -70 mV, the sodium cation entering the cell cause it to become less negative. This is known as depolarization.

The concentration gradient for Na+ will continue to enter the cell making the voltage to become positive reaching +30 mV. At the same time, this happens, other voltage-gated channels are also opening, a concentration gradient acts on K+, as well, as it leaves the cell, it takes a positive charge with it making the membrane potential to move back to its resting voltage of -70 mV. This is called repolarization.

For potassium ions to reach equilibrium the membrane voltage needs to be below -70 mV, this leads to a period of hyperpolarization that occurs while the K+ channels are open.

I annexed an image that illustrates this action potential process.

Considering the information given during depolarization there's an increase in the number of sodium leak channels (7) making the inside of the cell more positive (2) increase in the membrane potential (4), this also implies a decrease in the extracellular concentration of potassium (6)

Meanwhile, during hyperpolarization an increase in the extracellular concentration of potassium (3) decreases the membrane potential (1) making the inside of the cell more negative (5).

I hope you find this information useful and interesting! Good luck!

4 0

3 years ago