Which of the following statements concerning red blood cells is false?
A) Red cells are biconcave discs.
B) Red cells lack mitochondria.
C) Red cells are about 18 µm in diameter.
D) Red cells are specialized for carrying oxygen.
E) Red cells can form stacks called rouleaux.
C
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Parasympathetic preganglionic fibers leave the CNS in all of the following locations except
A) the midbrain. B) the pons. C) the medulla oblongata. D) spinal segments T1-L2. E) spinal segments S2-S4.
The ANS stimulates smooth muscles, skeletal muscles and glands, whereas the somatic nervous system innervates skeletal muscles only
Indicate whether the statement is true or false
Which of the following cells can NOT store energy for use during increased metabolic demand?
a. Adipocytes b. Skeletal muscle cells c. Brain cells d. Liver cells
Which of the following apply to the small intestine?
A. Secretions from the liver and pancreas enter this organ. B. Segmentation contractions occur in this organ. C. Both digestion and absorption occur in this organ. D. Mixing and propulsion of chyme. E. All of these choices apply to the small intestine.