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madreJ [45]
3 years ago
8

What is the first step in triggering a change in membrane potential?

Biology
1 answer:
Sophie [7]3 years ago
4 0

Answer:

The membrane potential is maintained in the cell due to the unequal distribution of the ions inside and outside of the cell. This membrane potential is important for the conduction of the nerve impulse.

The arrival of the stimulus triggers the action potential. The resting membrane potential is -70mV. This is maintained by the presence of potassium ions. The influx of the sodium ions result in the change in the membrane potential from -70mV to +30mV.

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The bohr model of the atom stated that the energy of an electron was quantized and therefore electrons could only exist in certa
rjkz [21]

Explanation:

Bohr model is able to explain the electromagnetic spectrum produced by different atoms of different elements. This is because an electron around the nucleus of an atom occupies distinct orbital levels around the nucleus and not in between. When an electron absorbs a specific wavelength of electromagnetic spectrum it 'hops' to an upper electron energy level equivalent to this wavelength of radiation. When the atom 'hops' to a lower orbital level it releases ta specific wavelength of radiation that is equivalent to the difference in the energy levels. This was unaccounted for in the Rutherford's planetary model.

The electron cloud model is thought to be an improvement on the Bohr model because it accounts for the Heisenberg Uncertainty Principle which stipulates that it is impossible to ascertain the momentum and location of an electron at the same time (because merely viewing an electron using light -or any kind of radiation - will change its direction and velocity). This model explains the likely position of an electron using probabilistic equations. The electron cloud model can therefore be used to explain bonding between atoms.

Learn More:

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3 0
4 years ago
A mutation in which of the following would result in a offspring with a phenotype different from the parents?
ollegr [7]
Egg cel :) because egg cells are used to produce offspring.
4 0
4 years ago
An article in the Los Angeles Times (Dec. 3, 1993) reports that 1 in 200 people carry the defective gene that causes inherited c
Alborosie

Answer: 5

Explanation:

Since 1 out of 200 people carry the defective gene that causes inherited colon cancer.

In a sample of 1000 individuals, we say

1 = 200

y = 1000

cross multiply

y x 200 = 1000 x 1

200y = 1000

y = 1000/200

y = 5

Thus, in a sample of 1000 individuals, approximately 5 will be carriers

6 0
3 years ago
A child has blue eyes whereas his mother has brown eyes. Which of the following explains why the child has blue eyes?
marishachu [46]
C-A piece of DNA from the father carried the trait for blue eye color.
6 0
3 years ago
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A prokaryote's capsule is: A. A layer of amino acids made from polysaccharides. B. A layer of mucous made of phospholipids. C. A
Soloha48 [4]
D should be your answer:)
4 0
3 years ago
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