1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stepan [7]
3 years ago
12

Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse?

Biology
1 answer:
quester [9]3 years ago
8 0

Answer:

the correct sequence of the events happened during nerve impulse is (d): 2,1,4,3

Explanation:

Originally K+ ions remains inward the membranes while Na+ ions remains outward to maintain a resting potential of membrane.

Upon stimuli Sodium channels open on membrane and Na+ diffuses inward leading to the depolarization of membrane that is it becoming more positive due to Na+ and K+ ions.

To regain it polarized state or in repolarization state Potassium channels open and K+ begun to diffuse outward while Sodium channels gets closed and Na+ ions remains inside the membrane.

Potassium channels are not efficient as compared to Sodium Channels, so an excess amount of K+ion move outward so Hyperpolarization state achieved.

As the both ions are on the wrong side and will not be available for the next nerve impulse. Hence in Refractory period by the help of Na+/K+ pum, both ions move back to their original place and membrane achieve its resting membrane potential state.

You might be interested in
Which of the following represents a possible chromosome number of a species that uses sexual reproduction, and why?
Ann [662]

Answer:

B. 62, because this number will create a haploid cell, allowing both female and male gametes to be combined.

Explanation:

Sexual reproduction involves two organisms to come together (male and female). Sexually-reproducing organisms make use of a process called MEIOSIS to produce gametes or sex cells, which have a reduced number of chromosomes as the parent cells producing them.

A sexually reproducing organism must contain a complete diploid chromosome number (2n) that allows it to produce cells with a haploid chromosome number via meiosis. The haploid gamete cells that result from each meiotic divisions of male and female parents can combine to form a whole diploid organism.

3 0
3 years ago
Look up viruses. Write a short summary of what they are and what they do.
vlabodo [156]

Answer:

Viruses are neither prokaryotes nor eukaryotes because they lack all of the characteristics of living things except for the ability to reproduce. They are considered parasitic because they cannot live or replicate without a living host. Viruses consist of genetic material (either DNA or RNA), a protein coat, and sometimes a lipid envelope surrounding the protein coat. They have no function except to reproduce.

7 0
3 years ago
How do mutations occur in the genetic code
Nastasia [14]

Answer:

Mutations in genetic code occurs when DNA is being duplicated.Any changes in the base pairs leads to mutations by trasition or transversion. Change in amino acid leads to change in sequence and thus, mutation. This si carried on to new generation, if it takes place in germ cells.

5 0
3 years ago
PLEASE HELP ME NOW!!!! (NOT FOR BEGINNER)
beks73 [17]
B, C, D, B

I hope these are right, hope this helped.
4 0
3 years ago
What makes two isotopes of the same element different from each other?
Lubov Fominskaja [6]

Answer:

An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

Explanation:

pretty sure its D

7 0
2 years ago
Other questions:
  • What is the function of the release factor during translation in eukaryotes?
    8·1 answer
  • HELP ME PLEASE FIRST TWO THAT ANSWER GET 6 POINTS How many kilometers per second electromagnetic waves travel through space?
    9·1 answer
  • Speciation caused by geographic division is called A) allopatric speciation B) genetic speciation C) parapatric speciation D) sy
    10·1 answer
  • Name the enlarged swelling at the end of a that is a sensory structure
    12·1 answer
  • How many pairs of chromosomes do people have?
    12·2 answers
  • The pressure in the large systemic veins leading into the heart is called what? The pressure in the large systemic veins leading
    15·2 answers
  • 1: Which two parts of the taxa do we use to name organisms?
    11·1 answer
  • 23. Which is not a form of removal of waste from the body?
    9·1 answer
  • A malignant lesion of the forehead measuring 1.0 cm was removed. The operative report states skin margins are 1.1 cm on all side
    9·1 answer
  • Which of the following provided structural evidence for the concept of a common ancestor
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!