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
mamaluj [8]
3 years ago
8

The muscle cells of people with muscular dystrophy lack a protein, called dystrophin, that helps maintain the sarcoplasmic retic

ulum of muscle cells. as a result, the sarcoplasmic reticulum allows calcium ions to leak out. why would this condition affect muscle function?
Biology
1 answer:
bonufazy [111]3 years ago
6 0

Answer: It will affect muscle contraction because it is needed for the formation of muscle contraction cross-bridge.

Explanation: During muscle contraction calcium binds to troponin, a protein complex that regulates muscle contraction by exposing the binding site of actin filament. Actin filament active site is where myosin head binds to, creating a cross-bridge using enzyme ATPase to speed the reaction. Calcium ion are needed to activate troponin movement, otherwise it stays in its inactive form blocking the active site of actin filament. Without calcium ions, troponin will not move and there will be no muscle contractions.

You might be interested in
Read the following scenarios carefully and explain how natural selection will occur in each.
IrinaK [193]

Answer:

The correct answer is - Noctural worms have the advantage over diurnal due to the fact that the nocturnal worms are burrowing during the feeding time of birds.

Explanation:

Natural selection is the process in which organisms adapt according to environmental changes to increase their survival rate. Natural selection leads to natural changes in different organisms.

In this case, diurnal worms are forced by the natural selection here to adapt to the change if they want to survive. Here, natural selection works for the nocturnal and against the diurnal.

4 0
3 years ago
Cyanobacteria have been engineered to produce isobutanol directly. What advantage does this have over other alternative biofuels
irina1246 [14]
There exists the same question that has the following choices.

<span>a. It is an inherently renewable fuel source.
b. Multiple processing steps can be avoided.
c. They produce chemical energy through photosynthesis.
d. They make a biofuel alternative to gasoline.
</span>
The correct answer is letter <span>b. Multiple processing steps can be avoided.</span>
4 0
3 years ago
What is the angle of tilt of the Earth’s axis?
Free_Kalibri [48]

It's on 23.5 degrees

4 0
3 years ago
Which class of hydrocarbons contains at least one carbon-carbon triple bond?
butalik [34]

Answer:

Alkenes, A hydrocarbon with at least one carbon–carbon double bond that is unsaturated. An unsaturated hydrocarbon with at least one carbon—carbon triple bond between two carbon atoms is known as an alkyne.

Explanation:

8 0
3 years ago
1. How do living things get energy from the sun?
denis23 [38]

Living things get energy/food from the sun through a process called Photosynthesis

it's the process by which living organisms manufacture food in the present of sunlight, oxygen and some other vital nutrients.that is Carbon dioxide etc

3 0
2 years ago
Other questions:
  • Counting tree rings is an example of which type of dating
    8·2 answers
  • Substance b is found to be more viscous than substance A. This means that ?
    5·1 answer
  • Why does hurricane season occur from late spring through fall in the Atlantic region?
    12·2 answers
  • Help lolllllllll HAHAHHAHAHAHAHHAHAHAH
    11·1 answer
  • If an electromagnetic is made using a battery circuit and a steel nail, how can its magnetic strength increase
    7·1 answer
  • How do polar molecules form Hydrogen Bonds?
    5·2 answers
  • Help pls :(( it would help me alot
    6·1 answer
  • What is the main source of energy for the world
    6·1 answer
  • Chemotherapy and Radiation therapy target which cells?
    8·1 answer
  • What's the difference between meiosis and mitosis​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!