Which of the following is not true of cardiac myocytes?
A. They are joined by intercalated discs.
B. They have T tubules that admit extracellular calcium.
C. Mitochondria make up about 2% of the cell volume.
D. They are striated.
E. They usually have one nucleus.
C. Mitochondria make up about 2% of the cell volume.
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In a lean adult male, the body consists of about ________ percent water
A) 60 B) 90 C) 40 D) 10 E) 80
Irregular and unpredictable vasoconstriction in the fingertips and toes (such as occurs in Raynaud's syndrome) would most likely be caused by
A) both local and systemic defects in sympathetic response controlling muscle tone in vessel walls. B) insufficient vasomotor responses by the sympathetic nervous system. C) defective control of blood pressure by both the sympathetic and parasympathetic divisions. D) irregular and unpredictable responses by the parasympathetic division. E) None of the answers are correct.
Chemistry is not important in anatomy and physiology.
Answer the following statement true (T) or false (F)
In which region(s) of the GI tract do peristaltic contractions occur?
A. the small intestine B. the large intestine C. the stomach D. the esophagus E. All of these options are correct.