What Is the Effect of the Parasympathetic Fibers Carried by the Vagus

question 31

Multiple Choice

What is the effect of the parasympathetic fibers carried by the vagus nerve?

• A) The heartbeat is not influenced by the vagus nerve.
• B) They slow the heartbeat.
• C) They speed up the heartbeat.
• D) They increase the force of cardiac contractions.

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Definitions:

Ribosome

Ribosomes are molecular machines within cells that synthesize proteins by translating messenger RNA into polypeptide chains, essential for all cellular functions.

Polypeptide Chain

A long, continuous, and unbranched chain of amino acids linked by peptide bonds that forms part of the structure of proteins.

tRNA Molecules

Transfer RNA; small RNA molecules that transport amino acids to the ribosome during protein synthesis, ensuring the correct amino acid sequence is assembled according to the mRNA template.

Gene Expression

The process by which information from a gene is used to synthesize functional gene products, often proteins, which can affect the cell's structure and function.