While standing, looking up at the stars requires ________.
A. abduction of the neck
B. elevation of the mandible
C. dorsiflexion of the neck
D. hyperextension of the neck
E. extension of the neck
Answer: D
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The sensor-receptive cells in the retina that function best in dim light and enable night vision are the ________
A) Rods B) Pupil C) Iris D) Cones
The vessels with the greatest total cross-sectional area are the arteries
Indicate whether the statement is true or false
The vertebral arteries are branches of the:
a. subclavian b. brachocephalic c. common carotid d. aorta
Select the correct statement about the neural mechanisms of respiratory control
A) The pons is thought to be instrumental in the smooth transition from inspiration to expiration. B) The dorsal respiratory group neurons depolarize in a rhythmic way to establish the pattern of breathing. C) The ventral respiratory group is contained within the pons. D) The pontine respirator group (PRG) continuously stimulates the medulla to provide inspiratory drive.