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
xxTIMURxx [149]
3 years ago
11

What is required to initiate the coupling of myosin to actin?

Biology
1 answer:
VladimirAG [237]3 years ago
6 0

Answer:

<h2>Calcium ions</h2>

Explanation:

The actin and myosin are the myofilaments which are involved in the contraction and relaxation of the muscle. The actin is thin filaments and contains the attachment site for the myosin but the site is blocked by the tropomyosin and troponin proteins.  

When calcium ions present in the muscle binds to the troponin molecules, it changes the conformation of the tropomyosin. This change exposes the attachment site of the myosin and then the myosin binds the troponin and causes Powerstroke and leads to contraction of a muscle.

Thus, Calcium ions is correct.

You might be interested in
In fruit flies, a specific gene mutation causes the wings to become malformed. These wings are called vestigial because they do
Ilya [14]
<span>The majority of the offspring population has functioning wings.</span>
6 0
3 years ago
Read 2 more answers
primary succession is a pioneer species move into an area that has no plants.Which organisms are common pioneer species?
leva [86]

Answer: B - mosses and lichens that can grow on Rocky surfaces

Explanation: Primary succession usually starts or begins on rock outcrops. It could include bare surfaces, volcanic mountains or an area (water surfaces) with no soil.

In primary succession, pioneer organisms including algae, lichen, mosses and fungi usually are the pioneer species. Other abiotic factors like wind and water play roles of normalizing the habitat.

6 0
3 years ago
Read 2 more answers
A common dna structural feature involved in gene regulatory systems is
Nata [24]
The answer for this one is b) Looping of DNA
6 0
3 years ago
Answer asap will give brain thing
Alenkasestr [34]

Answer:

1. Antonie van Leeuwenhoek made the first microscope and used it to look at bacteria and study bacteria, and Robert Hooke studied cells and saw cavities in the cells that looked like small boxes - he discovered plant cells! he recognized cells as the basic unit of life, a basis for Cell Theory.

2. cell theory is: every living organism is made of one or more cells, cells are the smallest units of life ( that have the properties of a living thing), All cells come from other cells  - all living things come from other living things. This relates to every living thing because all living things come under cell theory - like all living things are made of cells

3. prokaryotes, like bacteria, doesn't have a nucleus covered in a membrane. a eukaryotic cell, like an animal cell, has a membrane covered nucleus. just like the nucleus, in eukaryotes the organelles are not membrane bound. in prokaryotes, the organelles are membrane bound. In prokaryotes the DNA form is circular, while the DNA form in eukaryotes is linear. there are more, but i couldn't list them.

4. Example for prokaryote: the famous (or infamous) E. Coli bacterium. example for eukaryote: Humans!

5. Single-celled organisms (unicellular organisms) have all the functions necessary for their survival in the single cell. Multicellular organisms (many celled organisms), however, need many cells to survive and carry out all the functions necessary for their survival and do the different tasks each cell is supposed to do.

I hope this helped, please do correct me if I am wrong!

Explanation:

8 0
3 years ago
What is different between a grasshoper's Sheleon and yours
goblinko [34]
We have an internal skeleton and a grasshopper has an external skeleton.
3 0
3 years ago
Other questions:
  • In Africa, dragon color is co-dominant. The colors blue and yellow are co-dominant.
    5·1 answer
  • The channel protein that accounts for why water can cross a membrane more quickly than expected is
    11·1 answer
  • What is the process that changes one set of chemicals into a new set of different chemicals?
    10·1 answer
  • When scientists use their five senses to learn new information, it is called:
    15·2 answers
  • What did the structure of DNA’s double helix suggest about DNA’s properties?
    13·1 answer
  • What is a point of view of an object used to determine another objects motion.
    7·1 answer
  • Which of the following statements about phenotypes and genotypes is false?
    8·1 answer
  • Which statement explains something that the fossil record indicates?
    10·1 answer
  • Which shows the correct order of forces, from weakest to strongest?
    15·1 answer
  • Can anyone help…………………………
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!