Clusters of gray matter that contain neuron cell bodies and lie within masses of white matter are the
A. cortex.
B. cerebral ganglia.
C. cerebral nuclei.
D. ventricles.
E. cerebral peduncles.
Answer: C
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Which is not correct about the esophagus?
A. It produces movement by peristalsis. B. It serves as the passageway for a bolus to pass from the pharynx to the stomach. C. It opens to the cardia of the stomach. D. It is located posterior to the trachea. E. It secretes a variety of enzymes for chemical digestion.
The muscle cells of a marathon runner's legs would exhibit all these characteristics except
a. high resistance to fatigue. b. low myoglobin content. c. low glycogen content. d. many mitochondria. e. slow speed of contraction.
Which of the following statements regarding the hypothalamus is correct?
A) The hypothalamus works in conjunction with the subthalamus and regulates motor functions of the body. B) The hypothalamus is located in the inferior portion of the diencephalon and influences body movement in response to fear. C) The hypothalamus is located between the brainstem and cerebrum and is solely responsible for maintaining body temperature. D) The hypothalamus is the most inferior portion of the diencephalon and controls functions such as hunger, sleep, and vomiting.
The ________ is the pacemaker that initiates each heart beat
A) sinoatrial (SA) node B) atrioventricular (AV) node C) sympathetic division of the nervous system D) cardiac conduction system E) autonomic nervous system