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
hodyreva [135]
4 years ago
9

Arrange the steps in the correct order to explain how a muscle fiber contracts. Myosin and actin protein filaments attach to eac

h other. Calcium ions release into the myofibrils. Myosin filaments pull on the actin filaments. The nerve impulse reaches the neuromuscular junction. The motor neuron carries the nerve impulse. The sarcomere shortens.
Biology
1 answer:
Bingel [31]4 years ago
7 0

The motor neuron carries the nerve impulse.

↓

The nerve impulse reaches the neuromuscular junction.

↓

Calcium ions release into the myofibrils.

↓

Myosin and actin protein filaments attach to each other.

↓

Myosin filaments pull on the actin filaments.

↓

The sarcomere shortens.

The neurotransmitter (ACh) from motor neurons signals a muscle fiber to depolarize. The depolarization (Na+) will trigger Ca++ release and will initiate contraction by binding to troponin. Myosin pulls the actin strands. ATP sustains the contraction.

You might be interested in
A model of an atom includes red marbles for electrons, green marbles for protons, and blue marbles for neutrons. All marbles hav
Viefleur [7K]

Answer: Change the electron radius.

Explanation:

This  would be a more accurate representation because electrons are the smallest particles.

7 0
3 years ago
Read 2 more answers
In lecture, I mentioned most lakes are phosphorus limited. However, the most severely eutrophic lakes are often nitrogen limited
KIM [24]

Answer:

Phosphorus is essential for growth of plants and other organisms. When concentration of phosphorus mostly from high breeding rate e.g., pigs, cattle etc. rise in water it causes severe growth of plants and algae as well as phytoplanktons. As a results layers of phosphorus start to release phosphorus as well due to positive gradient. These reactions in water are iron-redox reactions that are crucial for the release of phosphorus.

When too much phosphorus accumulates, it produces a degrading growth feedback in plants, algae and phytoplanktons that then shift toward excessive nitrogen available from fertilizers and cause a flip from P to N. Cynobacteria now dominates and denitrification as well as nitrification takes place simultaneously.

Severe eutrophication induces hypoxia in water that cause a major damage to plants biodiversity in the environment.

5 0
3 years ago
Explain the relationship between correlation and causation.
ohaa [14]

Answer:

Correlation indicates that the two numbers are related in some way.

Causation requires more proof that there is no lurking variable that creates the relationship.

Explanation:

6 0
2 years ago
A swimmer sprints a short distance for a competition. The swimmer is not able to take in enough oxygen to make the ATP needed fo
Reptile [31]

When the swimmer is unable to take in enough oxygen for the sprint, the ATP (Adenosine triphosphate) will be compromised. In such conditions, the body will use anaerobic respiration to produce the ATP. Anaerobic respiration takes place in the absence of oxygen. It used the electron acceptors in place of the oxygen in the respiratory cycle. The amount of the ATP produced is, however, less in anaerobic respiration.

Hence, the answer is 'Option C - Anaerobic respiration would be used to produce small amounts of ATP in the absence of oxygen'.

3 0
4 years ago
Read 2 more answers
Where does a photoautotroph get its energy and carbon?
Illusion [34]
A photoautotroph get its energy and carbon from the sunlight and from organic material. Photoautotrophs are organisms that carry out photosynthesis. They use energy from sunlight to carry out cellular processes. Hope this answers the question.
3 0
4 years ago
Other questions:
  • What is the correct sequence of events in transcription and translation?
    8·1 answer
  • Which structure has the least effect on the ability of a virus to infect and replicate in a host cell?
    15·2 answers
  • There are sepecies of fish that have more dna than humans true or false
    12·1 answer
  • Explain three ways human activitys negatively effect earths resources
    7·1 answer
  • During inhalation, air continues to move into the lungs until:_____
    7·2 answers
  • Why do mosquitos need warm temperatures?
    12·2 answers
  • What do scientists think life developed from?
    10·2 answers
  • Explain how a mutated DMD gene can result in the inability to walk​
    14·1 answer
  • A shoreline's first line of defense against hurricanes is​
    14·1 answer
  • How do biologists describe the order of the stages of the<br> cell cycle?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!