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jonny [76]
2 years ago
11

The term extinction applies to the eradication of an entire what ??

Biology
1 answer:
mojhsa [17]2 years ago
5 0

Extinction refers to the eradication of an entire Species. Hope this helped!

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Subject: Integrated Science Question
Vladimir79 [104]

The skin acts as a barrier for protecting the body from the harmful things such as sun rays, moisture, cold.

<u>Explanation:</u>

Skin plays an important role in regulating body temperature. It helps to prevent harmful substances enter into our body, and does not allow to loss water in our body. Its form the barrier that prevents harmful substances and microorganisms enter in our body.

Our skin is the protecting layers and against loss of water and blood from our body. Its help us to maintain the constant body  temperature. The important role of the skin us to protect our body from the ultraviolet rays.

3 0
3 years ago
Explain how the resting potential is created and maintained. (sodium potassium pump) What happens when sodium comes in and potas
MAVERICK [17]

Answer:

The resting membrane potential is created and maintained due to the difference in the total charge or ions present outside and inside of the cell. The resting membrane potential depolarize if sodium come in and and potassium leaves the cell.

Explanation:

The resting membrane is maintained and created by the distribution of potassium and sodium ions. The membrane potential of a resting cell is -70mV (negative) because more sodium ions is present outside the cell than the potassium ions present inside the cell.

When the sodium ions enter inside the cell and potassium ions move outside the cell, the inside of the cell becomes more positive as compared to the outside and the membrane potential changes from -70 mV to +30 mV. The cells will depolarize due to the accumulation of sodium ions inside the cell.

7 0
3 years ago
​Pascal has a mental age of 15 and a chronological age of 20. Using the IQ formula from the text, Pascal’s IQ would be described
valentinak56 [21]
For the answer to the question above, I believe that <span>Pascal’s IQ is <u><em>below average.
</em></u>
</span><span>He must have the same IQ as his age or even higher.<u><em>
</em></u>
</span><span>I hope this helps. Have a nice day!<u><em>
</em></u>
</span>
5 0
3 years ago
An ionic bond occurs when _____.
Svetach [21]
<span>Ions are another name for charged atoms. Some elements are electropositive, and some are electronegative. Electropositive elements such as metals like to give up electrons, thus taking on a positive charge. Electronegative elements such as chlorine attract electrons, so they become negative. When electropositive and electronegative atoms meet and exchange ions, they take on opposite charges. Because positive and negative charges attract, these charged atoms become attracted to one another. This attraction forms an ionic bond that keeps the ions together.</span>
4 0
3 years ago
Read 2 more answers
The binding of the neurotransmitter to receptors on the motor end plate causes which of the following to occur?
lutik1710 [3]

The correct answer is: Binding of the neurotransmitter causes chemically gated sodium channels to open in the motor end plate (junctional folds of the sarcolemma) and sodium enters the cell.

Action potential travels through the membrane of the presynaptic cell causing the voltage-gated channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells. Neurotransmitter ACh binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell). Depolarization occurs because sodium enters the cell as a result of neurotransmitter receptor binding.

5 0
3 years ago
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