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]
3 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]3 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
What biome receives more then 10 inches a year?
Sauron [17]
The rainforest. charhebkshduk. < I need more characters
8 0
3 years ago
How do cells combine and reproduce to create different combinations of DNA in babies?
zalisa [80]

Through the process of Meiosis

3 0
3 years ago
Which statement about the light-independent reactions in photosynthesis is true?.
rjkz [21]

Answer:

The correct answer would be They comprise the Calvin cycle.

Calvin cycle refers to the set of chemical reactions taking place in the stroma of the chloroplast in which carbon is fixed into food (glucose). The whole process is divided into three stages namely: fixation, reduction, and regeneration (ribulose bisphosphate or RuBP).

It takes place in light-independent reaction of the the photosynthesis.

It does not require light energy to carry out the reactions however, it depends upon the products of light reaction (ATP and NADPH).

Fixation of one molecule of glucose requires 6 molecules of carbon dioxide, 9 ATP and 6 NADPH.

The fixation of carbon is catalyzed by an enzyme RuBisCO.

3 0
3 years ago
Read 2 more answers
Sexual reproduction helps a species to be successful because
sveta [45]

Answer:

The fact that most eukaryotes reproduce sexually is evidence of its evolutionary success. In many animals, it is actually the only mode of reproduction. The genetic diversity of sexually-produced offspring is thought to give species a better chance of surviving in an unpredictable or changing environment.

8 0
3 years ago
Norepinephrine and dopamine are examples of transmitters whose synaptic activity is terminated by'
Musya8 [376]

The correct answer is reuptake.  

The reabsorption of a neurotransmitter by a neurotransmitter transporter situated along the plasma membrane of an axon terminal or glial cell after it has done its activity of conducting a neural impulse is called reuptake.  

The process of reuptake is essential for usual synaptic physiology as it permits for the recycling of neurotransmitters and monitors the neurotransmitter level in the synapse, thus, monitoring the duration of the signal resulting due to the discharge of the neurotransmitter.  


8 0
3 years ago
Other questions:
  • Where is the abdominal muscle that can only compress the abdomen?
    8·1 answer
  • Habitat destruction is very often the result of
    10·2 answers
  • Defending the body against bacterial infection and invasion by foreign substances is a function of __________.
    11·1 answer
  • In a certain plant, yellow fruit is dominant to white fruit. A heterozygous plant with yellow fruit is crossed with a plant with
    5·1 answer
  • A student views the image of a cell magnified 40000 times the image is 50mm long calculate the actual length of the sample in mi
    12·1 answer
  • Which of the following statements are TRUE? 1-Electron carriers are located at ribosomes. 2-ATP is a common intermediate between
    11·1 answer
  • Euglena, amoeba, paramecium: all one-celled protists. How does the paramecium move through its environment?
    5·2 answers
  • The yearly rise and fall of CO2 levels in the atmosphere are
    6·1 answer
  • HELP NEEDED ASAP!!!!
    10·1 answer
  • What is a microsphere?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!