4 頸動脈竇（carotid sinus）與頸動脈體（carotid body）是一壓力接受器（baroreceptor）與化學接受器

（chemoreceptor）位在總頸動脈分叉處，其訊息經由那一條神經傳入頭部？

 舌咽神經（Glossopharyngeal nerve）  頸襻（Ansa cervicalis）

 副神經（Accessory nerve）  舌下神經（Hypoglossal nerve）

a

Functions

There are a number of functions of the glossopharyngeal nerve:

• It receives general sensory fibers (ventral trigeminothalamic tract) from the tonsils, the pharynx, the middle ear and the posterior 1/3 of the tongue.
• It receives special sensory fibers (taste) from the posterior one-third of the tongue.
• It receives visceral sensory fibers from the carotid bodies.
• It supplies parasympathetic fibers to the parotid gland via the otic ganglion.
• It supplies motor fibers to stylopharyngeus muscle, the only motor component of this cranial nerve.
• It contributes to the pharyngeal plexus.

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5 實施中心靜脈壓（CVP）注射時，須摸到股動脈脈搏，在何處下針？

 脈搏處內側 脈搏處外側 脈搏處 脈搏處下方

a

VAN = lateral to medial

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15 下列何者為尿道外括約肌（external urethral sphincter）所在處？

 膀胱頸 膜部尿道 前列腺尿道 陰莖部尿道

B

the internal urethral sphincter is at the base of the bladder neck