The activities of all visceral organs are coordinated through the regulation of their smooth muscles and glands by the nerve fibres of the sympathetic and parasympathetic nervous system. These constitute the autonomic nervous system which carry out functions that are not under the control of our will.

Correct Option: D

The activities of all visceral organs are coordinated through the regulation of their smooth muscles and glands by the nerve fibres of the sympathetic and parasympathetic nervous system. These constitute the autonomic nervous system which carry out functions that are not under the control of our will.

Prominent granules (Nissl’s granules) observed in the cytoplasm of the cyton are believed to be made of ribosomes. A Nissl body (or Nissl granule or tigroid body) is a large granular body found in nerve cells. It was named after Franz Nissl, German neurologist (1860-1919). Nissl bodies can be demonstrated by selective staining, which was developed by Nissl and the stain used was an aniline stain to label extranuclear RNA granules. These granules are rough endoplasmic reticulum (with ribosomes) and are the site of protein synthesis. Nissl bodies show changes under various physiological conditions and in pathological conditions they may dissolve and disappear (karyolysis).

Correct Option: A

Prominent granules (Nissl’s granules) observed in the cytoplasm of the cyton are believed to be made of ribosomes. A Nissl body (or Nissl granule or tigroid body) is a large granular body found in nerve cells. It was named after Franz Nissl, German neurologist (1860-1919). Nissl bodies can be demonstrated by selective staining, which was developed by Nissl and the stain used was an aniline stain to label extranuclear RNA granules. These granules are rough endoplasmic reticulum (with ribosomes) and are the site of protein synthesis. Nissl bodies show changes under various physiological conditions and in pathological conditions they may dissolve and disappear (karyolysis).

Neuroglia are non-nervous cells present- along with and in between the neurons in central nervous system, ganglia and retina. They have roles like myelin formation, transport of materials to neurons, maintenance of ionic balance and phagocytosis.

Correct Option: C

Neuroglia are non-nervous cells present- along with and in between the neurons in central nervous system, ganglia and retina. They have roles like myelin formation, transport of materials to neurons, maintenance of ionic balance and phagocytosis.

Anesthetic chemicals block the voltage gate sodium and potassium channel.

Correct Option: D

Anesthetic chemicals block the voltage gate sodium and potassium channel.

Muscles of the tongue are invested by the 12th cranial nerve, Hypoglossal. The 10th cranial nerve, vagus supplies the viscera of the thorax, abdominal region and thus controls gastrointestinal, cardiac movements and pancreatic secretion.

Correct Option: A

Muscles of the tongue are invested by the 12th cranial nerve, Hypoglossal. The 10th cranial nerve, vagus supplies the viscera of the thorax, abdominal region and thus controls gastrointestinal, cardiac movements and pancreatic secretion.