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Art [367]
3 years ago
7

What causes skeletal muscle relaxation? A) nhibitory interneuron releases GABA onto muscle B) Descending neurons from brain dire

ctly inhibit muscle fibers C) Motor neuron does not fire action potentials E) Inhibitory motor neuron releases acetylcholine onto muscle
Biology
1 answer:
Molodets [167]3 years ago
5 0

Answer:

The correct option is C. Motor neuron does not fire action potentials

Explanation:

During contraction, the motor nerve passes down an action potential. A neuromuscular junction is formed by the motor neuron which stimulates the entry of calcium ions. The calcium ions bind to structures called as troponin which stimulates the binding of the filaments, actin and myosin. The filaments begin to contract by using ATP.

During relaxation, the action potential is stopped. Calcium is taken back into the sarcoplasmic reticulum. As a result, actin and myosin filaments do not link and hence, the contraction is stopped.

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Aye sir!
5 0
3 years ago
Read 2 more answers
Read the information for transcription and then answer the question. Protein Synthesis Explain the process of transcription.
bagirrra123 [75]

Answer:

Please find the explanation below

Explanation:

Transcription is the first process that occurs in protein synthesis. It involves the use of the stored information in the DNA molecule to synthesize a mRNA molecule.

Transcription, which occurs in the nucleus of eukaryotes and cytoplasm of prokaryotes, is catalyzed by an enzyme called RNA polymerase. RNA polymerase binds to the double-stranded DNA and begins to unwind it (Initiation). This unwinding causes the nucleotide bases to be exposed in order for the RNA polymerase enzyme to read.

The enzyme reads the bases of the DNA and begins to synthesize RNA nucleotides using the complementary base pairing rule (Elongation) i.e. Adenine base paired with Uracil base (RNA), and Guanine paired with Cytosine etc.

The single-stranded mRNA is released at the end of the transcription process (termination). This is basically what occurs in transcription.

7 0
3 years ago
Read 2 more answers
Select the pair of structures that best shows how plant cells are different from animal cells. A. cytoplasm and mitochondria B.
Andru [333]
The answer is B, because only plants have chloroplasts (which they use for photosynthesis) and cell walls (which protects and supports the plant cell)
4 0
3 years ago
Read 2 more answers
What would happen if we didnt have mitochondria ? ( paragraph)
slamgirl [31]
Basically, the cell wouldn't be able to "breathe," as the mitochondria is where the respiratory functions of the cell happens. No energy would be produced, and then the cell would stop moving and die.
6 0
3 years ago
Find the error(s) and fix the statement: Land heats slower and to lower temperatures than water.
klio [65]

Land heats slower and too lower tempetures then water i believe is correct


3 0
3 years ago
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