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
qaws [65]
10 months ago
13

Place the following events of muscle excitation in the correct order.

Biology
1 answer:
svetlana [45]10 months ago
7 0

An motion potential in the presynaptic cell activates calcium channels. Ca+ triggers the discharge of Acetylcholine through exocytosis. Ach binds its receptors in the postsynaptic membrane, opening Na+ channels. The Order is 4, 3, 5, 1, 2.

The principal frightened system generates an motion potential that travels to the goal activating the calcium channels ⇒ event (4)

Calcium triggers vesicles fusion to the presynaptic membrane. By exocytosis, vesicles release the neurotransmitter -Acetylcholine- into the synaptic space ⇒ event (3)

Once there, Ach binds to its receptors on the postsynaptic membrane of the skeletal muscle fiber, causing ion channels to open ⇒ event (5)

Positively charged sodium ions move the membrane to get into the muscle fiber (sarcoplasm) and potassium leaves the cell ⇒ event (1)

The distinction in charges, resulting from these ions' transport, positively charges the fiber membrane. The postsynaptic cell depolarizes ⇒ Event (2)

The motion potential enters the t-tubules depolarizing the internal part of the muscle fiber. Contraction initiates while the motion potential depolarizes the internal part of the muscle fiber. Calcium channels spark off in the T tubules membrane, releasing calcium into the sarcolemma.

At this point, the muscle is at rest, and the tropomyosin is inhibiting the appeal strengths between myosin and actin filaments. Tropomyosin is obstructing binding sites for myosin on the skinny filament.

When calcium enters the sarcolemma, it binds to troponin C, and troponin T alters the tropomyosin role through shifting it and unblocking the binding sites.

Myosin heads be a part of the uncovered actin-binding points forming move-bridges, and whilst doing so, ATP turns into ADP and inorganic phosphate, that's released.

Myofilaments slide impulsed through chemical energy accumulated in myosin heads, generating a strength stroke. The strength stroke initiates while the myosin move-bridge binds to actin. As they slide, ADP molecules are released. A new ATP hyperlinks to myosin heads and breaks the bindings to the actin filament.

Then ATP splits into ADP and phosphate, and the energy produced is gathered in the myosin heads, which begins offevolved a new binding cycle to actin.

Finally, Z-bands are pulled towards every other, and the sarcomere and the I-band get shorter, generating muscle fiber contraction.

According to those steps, the appropriate order of activities is 4, 3, 5, 1, 2.

To learn more about Acetylcholine, click here:

brainly.com/question/13821381

#SPJ4

You might be interested in
Insects often act as pollinators for plants. In turn, plants provide these insects with food. What kind of a relationship exists
sesenic [268]
A very strong relationship. I'll take the easiest example :the bees. They are so important for our planet. Without them, we and all living creatures on earth would be on track to dispariton. Let me explain why. At first, the bees need the nectar from flowers to make honey ( source of food ). As they pollen from flower to flower, they transport pollen on their tiny little legs and in this way, they help the plants to reproduce themselves. If, for some reason, there will be no more bees. Plants and flowers will not thrive, plants will be eaten without having contribued to the productivity of the species and they will go out. No plants, no more veggies or fruits for herbivorous and humans, no more herbivorous no more food for carnivorous, etc. Also, without plants, there will be less oxygen on our planet. Slowly the fauna and flora will die on earth and then it will be our turn. That is why relationships with plants and insects are so important. Plants produce oxygen for all of us and they are a natural and healthy source of food and insects help plants to survive and thus save the species.
3 0
3 years ago
Changing states of water requires energy, where does that energy come from?
I am Lyosha [343]

Answer:

Energy comes from different sources such as oil, coal the wind and the sun.

3 0
3 years ago
Read 2 more answers
A. Structure that organizes motion of chromosomes.
stealth61 [152]

Answer:

lol NO I MENA CENTROILE

Explanation:

3 0
2 years ago
Read 2 more answers
The stage of infection from the time a pathogen enters your body until symptoms appear is known as the _______________ stage.
Sophie [7]
Incubation stage is the stage where the prepares and begins a full on assault of your body.
6 0
2 years ago
Mitosis cannot occur until the genetic material inside of a cell has been copied. where in the cell is this genetic material loc
Alexus [3.1K]
In the nucleus of the cell, there are chromosomes that contain genetic material
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which description refers to cumulus clouds?
    5·1 answer
  • Such relatively small areas of those precipitation values would likely be associated with ________.
    11·1 answer
  • Water is an example of a<br><br>A. mixture<br>B. non-polar molecule<br>C. solute<br>D. compound
    15·1 answer
  • What happens during the lysogenic cycle
    9·1 answer
  • A turtle laying in the sun to maintain its body temperature
    8·1 answer
  • What animals are most likely to survive in the wild?
    9·2 answers
  • Desdoblamiento de la cadena del ADN​
    14·1 answer
  • The act of doing what's best for the group is called__​
    12·2 answers
  • The table shows the energy that is stored in three types of organic molecules. What is the best conclusion based on this data?
    5·1 answer
  • Negative feedback: If blood delivery is low, the heart rate should <br>A. Increase <br>B. Decrease​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!