1. The intemal jugular veins drain blood from the (i) brain. (ii) face. (iii) tongue. (iv) thyroid gland. 2. The deep cervical group of lymph nodes is situated (i) along the course of the external jugular vein. (ii) behind the carotid sheath. (iii) superficial to the investing layer of the deep cervical fascia. (iv) along the course of the intemal jugular vein. 3. The function of the medial pterygoid muscle is to assist other muscles in (i) elevating the jaw. (ii) retracting the jaw. (iii) protruding the jaw. (iv) moving the jaw laterally to the ipsilateral side.