The hydrogen ion concentration or pH of arterial blood is regulated by the combined actions of the ________ and ________.
A) kidneys : buffer systems
B) lungs : kidneys
C) kidneys : cardiovascular system
D) kidneys : lymphatic system
E) lungs: buffer systems
Ans: B) lungs : kidneys
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Patients with injuries to the thoracic spinal cord segment with two paralyzed legs are said to be ________
A) Suffering from Guillain Barré syndrome B) Quadriplegics C) Paraplegics D) None of the above
Which labeled structures in the figure are lamellae?
a) A b) B c) C d) D e) E
The release of breast milk that occurs when a mother hears a crying child is called the milk ________ reflex
Fill in the blank with correct word.
Where do preganglionic fibers of the parasympathetic system originate?
A. The thoracolumbar region of the spinal cord B. The lateral horns of the spinal cord from T1 through L2 C. The cerebral cortex D. The paravertebral ganglia E. The brain stem and sacral region of the spinal cord