Cranial Nerve X - Vagus Nerve [Part 2b] | Structure & Functions of UQ & Thoracic Branches

Where does the vagus nerve originate?

• Cerebrum

• Pons

• Cerebellum

• Medulla oblongata

What is the function of the meningeal branch of the superior ganglion?

• Sensory innervation to the heart

• Motor innervation to the ear canal

• Sensory innervation to the dura mater

• Motor innervation to the pharynx

Which nerve is responsible for innervating the pharyngeal constrictors?

• Trigeminal nerve

• Pharyngeal branch of the vagus nerve

• Glossopharyngeal nerve

• Accessory nerve

What type of receptors are found in the carotid sinus?

• Chemoreceptors

• Photoreceptors

• Baroreceptors

• Thermoreceptors

What is the primary function of the internal laryngeal nerve?

• Motor innervation to the vocal cords

• Sensory innervation above the vocal cords

• Motor innervation to the heart

• Sensory innervation below the vocal cords

Which muscle is primarily innervated by the external laryngeal nerve?

• Posterior cricoarytenoid muscle

• Arytenoid muscle

• Cricothyroid muscle

• Lateral cricoarytenoid muscle

What is the significance of the recurrent laryngeal nerve's path in relation to the aorta?

• It loops under the right subclavian artery

• It loops under the arch of the aorta

• It loops over the left subclavian artery

• It loops over the brachiocephalic artery

How does the vagus nerve enter the abdominal cavity?

• Through the foramen magnum

• Through the carotid canal

• Through the esophageal hiatus

• Through the jugular foramen

What effect does the vagus nerve have on the heart during a parasympathetic response?

• Decreases blood pressure

• Increases heart rate

• Decreases heart rate

• Increases blood pressure

Which vagus nerve controls the SA node?

• Neither vagus nerve

• Both vagus nerves equally

• Right vagus nerve

• Left vagus nerve