Why are ruptured intervertebral discs more common in lumbar vertebrae and dislocations and fractures more common in cervical vertebrae?
The lumbar vertebrae have massive bodies and carry a lot of weight; these factors contribute to the rupturing of an intervertebral disc. The cervical vertebrae are more delicate and have small bodies; these factors increase the possibility of dislocations and fractures in the cervical vertebrae.
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A 40-year-old man of average height who weighs 210 pounds complains of pain behind the sternum which he describes as "heartburn." The pain is especially acute after eating spicy foods. What is a likely cause of his symptoms?
A. Cirrhosis B. Crohn disease C. Gastroesophageal reflux disease D. Constipation E. Diverticulitis
The Frank-Starling curve for heart muscle is analogous to a length-tension curve in skeletal muscle.
Answer the following statement true (T) or false (F)
Which of the following is a descending pathway in the spinal cord?
A. fasciculus gracilis B. corticospinal tract C. spinothalamic tract D. spinoreticular tract E. trigeminothalamic tract
Which of the following is least likely to occur late in the postabsorptive state?
A. hydrolysis of triglycerides B. use of acetyl-CoA and ketones for energy C. formation of glycogen D. use of proteins as an energy source E. reduced removal of glucose from the blood