Answer:
A.) mRNA ( messenger RNA )
Explanation:
Options for the question have not been provided. They are as follows:
A) somatic neurons in the spinal cord
B) the reticulospinal and vestibulospinal tracts
C) the vagus nerve and enteric plexus
D) the rubrospinal tracts
Answer:
C) the vagus nerve and enteric plexus
Explanation:
Enteric plexus or enteric nervous system is a part of autonomic nervous system and controls the gastrointenstinal (GI) tract. Vagus nerve is tenth cranial nerve and it innervates the enteric plexus. Both work together to control various functions of GI tract like peristalsis and gastric secretion. They release Gastrin-releasing peptide due to which the G cells of stomach are stimulated secrete gastrin. Gastrin in turn stimulates parietal cells of stomach to secrete gastric juice.
The flow of energy from the Earth's interior originates from two main sources: the radiogenic and primordial heat respectively. Radiogenic heat is produced by the radioactive decay of isotopes in the mantle, whereas primordial heat is the energy left over since the Earth's formation.
Without using any sensitive scientific equipment, this flow of energy is observable at stress points between the tectonic plates, such as volcanoes. These are ruptures in the crust of the planet through which materials from the interior of the planet are expelled.