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.
A
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Which of the following statements regarding the precision of locating a somatic stimulus is FALSE?
A. The precision is greater in areas of the body that have small, overlapping receptive fields than in areas with large, nonoverlapping receptive fields. B. Convergence of afferent neurons onto common ascending pathways increases acuity. C. The precision is greater in the lips and fingers than on the back. D. The precision is greater for the skin than for the internal organs. E. Lateral inhibition of parallel afferent pathways increases the precision of locating a stimulus.
The statement "a rotating body will maintain a state of constant angular motion unless acted on by an external torque" refers to which of the following?
A. Newton's first law of inertia B. Newton's second law of acceleration C. Newton's third law of action/reaction D. none of the above
Where are germinal centers located?
A. Thymus B. Spleen C. Lymphatics D. Lymph nodes E. Tonsils
The hormone that stimulates ovulation is
A) luteinizing hormone. B) FSH. C) growth hormone. D) progesterone. E) testosterone.