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sashaice [31]
3 years ago
14

A population of 2,000 birds has an annual per capita birth rate of 14/100, an annual per capita death rate of 9/100, and an emig

ration rate of 2/100. What was the per capita rate of increase, including emigration, for this year?
14
60
0.03
0.06
Biology
1 answer:
kifflom [539]3 years ago
8 0
14 i did that quiz last week
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"forest ferny floor" is an example of : alliteration

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Correctly identify each of these definitions or examples as either depolarization or hyperpolarization of the plasma membrane. 1
natulia [17]

Answer:

  1. hyperpolarization
  2. depolarization
  3. hyperpolarization
  4. depolarization
  5. hyperpolarization
  6. depolarization
  7. 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. <em>This is known as depolarization.</em>

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. <em>This is called repolarization. </em>

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

I annexed an image that illustrates this action potential process.

<em>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)</em>

<em>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).</em>

I hope you find this information useful and interesting! Good luck!<em>       </em>

4 0
3 years ago
Jerry is older than Susie, and Susie is older than Lauren. Therefore, Jerry is the oldest.
NemiM [27]
A. Deductive reasoning is using multiple statements to come to one conclusion. <span />
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Unicellular organisms
skad [1K]

Answer: they can be both

Explanation:

Because protozoan and fungi are eukaryotic and bacteria are prokaryotic

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