Which spinal nerves contribute to the brachial plexus?
A. L4-S4
B. S1-Co1
C. L1-L5
D. C1-C5
E. C5-T1
Answer: E
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Each hemoglobin molecule can transport two molecules of oxygen
Indicate whether the statement is true or false
Astronauts in zero gravity are able to move food through their digestive tracts because
A. smooth muscle produces waves of contractions that propel material through the digestive tract. B. striated muscle creates a pressure gradient that forces material from one end of the digestive tract to the other. C. skeletal muscle puts pressure on the digestive tract. D. cardiac muscle maintains a high pressure that moves material through the digestive tract. E. skeletal muscle sphincters contract and allow materials to move through the digestive tract.
The bundle of ____ distributes the electrical charge over the medial surfaces of the ventricles
a. His b. Purkinje c. sinoatrium d. myoatrium
When assessing a patient with maxillofacial trauma, it is MOST important to:
A) gently palpate the maxilla, mandible, and zygoma to elicit crepitus. B) protect the cervical spine and monitor the patient's neurologic status. C) apply a cervical collar and determine if the patient has visual disturbances. D) have the patient open his or her mouth and assess for dental malocclusion.