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
OLEGan [10]
3 years ago
6

What specific event triggers the uncovering of the myosin binding site on actin?

Biology
1 answer:
Bess [88]3 years ago
3 0
Striated muscles contain repeating sarcomeres of overlapping arrays of long, thin actin and thicker myosin filaments. Myosin filaments contains the myosin heads, which are enzymes that can bind to actin, split and make use of the energy from ATP. When muscle contraction starts, myosin heads bind to actin, change their configuration on actin, liberating the products of ATP hydrolysis and causing slide of the actin and myosin filaments. The action of the proteins troponin and  tropomyosin on the actin filaments regulates vertebrae striated muscle contraction. The release of calcium ions from the sarcoplasmic reticulum is triggered by the nervous stimulation which causes depolarization of muscle membrane. Calcium ions bind to troponin and thus cause or allow the tropomyosin strands on the actin filament to move so that the part of the actin surface where myosin heads need to bind is uncovered. Contraction then occurs and only stops when the sarcoplasmic reticulum pumps calcium out of the muscle interior.

So basically, what triggers the uncovering of the myosin binding site on actin is the calcium ions binding to troponin and changing configuration.
You might be interested in
Based on the synthesis reaction what would the product of the reaction be? NaPO3+CuO
Sergeu [11.5K]
The answer is NaCuPO4
6 0
2 years ago
Read 2 more answers
A scientist discovers a new species near coral reefs in Australia. She finds that this single-celled species is photosynthetic (
pochemuha

Answer:

1. Eukaryotic

2. Eukaryota

Explanation:

1. Eukaryotic- The newly found species has a cell wall and contains membrane-bound organelles. The presence of membrane-bound organelles shows that the cell is a Eukaryotic cell.

2. Eukaryota- the species is single-celled with the presence of cell wall without peptidoglycan. This shows that the species could belong to the Eukaryota domain proposed by Carl Woese.

Thus, 1. Eukaryotic and 2. Eukaryota is the correct answer.

4 0
2 years ago
PLEASE HELP!!Need to submit these assignments before tomorrow for extra credit.
ELEN [110]
Could you possibly tell me what exactly you need help with? As my computer already has viruses, I am surely not going to click on any of those. Sorry!
5 0
3 years ago
G=gray fur g-white fur
Liula [17]
GgBb because heterozygous means you have 2 different alleles for both traits
3 0
3 years ago
Fish, eels, and lobsters living in a coral reed is an example of?
Arada [10]

Fish, eels, and lobsters living in coral reef not reed are examples for habitat.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Why might food scientists improve your favorite breakfast food?
    6·1 answer
  • What is the pattern of inheritance for a rare recessive allele [a] every affected person has an affected parent. [b] unaffected
    8·1 answer
  • Which of the following pulmonary term correlates with the definition: bronchospasm of the bronchial walls?
    8·1 answer
  • Which is the cell structure that is made of DNA that gives the master instructions for the cell? centromere chromosome allele ge
    13·2 answers
  • Why do we not have many fossil records from the precambrian era?
    12·2 answers
  • Which feature helps a cephalodpod, like a squid or octopus, to be a predator?
    12·1 answer
  • pls help ill give brainliest :) Jezmena traveled at a speed of 14km/h for 2.2 hours. What was the distance covered?
    13·1 answer
  • What are the three plate boundary types and<br> the two types of crust?
    8·1 answer
  • Can you name at least three organelles structure inside of an animal cell
    7·2 answers
  • Need it now 100 points
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!