Depolarization of the ventricles is represented on an electrocardiogram by the
A) P wave.
B) T wave.
C) S wave.
D) QRS complex.
E) PR complex.
D
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This figure illustrates the microscopic anatomy of spongy bone. What bone feature does number 4 indicate?
A. Osteocyte in lacuna B. Trabeculae C. Osteon D. Canaliculus E. Perforating canal
________ cells are found in the sinusoids of the liver, and they remove debris from the blood as it flows past.
Fill in the blank(s) with the appropriate word(s).
Physical connections of the medulla include
A) all fibers connecting the brain to the spinal cord. B) ascending tracts, but not descending tracts, from the brain. C) descending tracts, but not ascending tracts, to the brain. D) direct links between the spinal cord and cerebellarl hemispheres. E) All of the answers are correct.
Answer the following statements true (T) or false (F)
1. The vas deferens is classified as an accessory organ of the male reproductive system. 2. In the male, the testes produce sperm. 3. The gonads for the female reproductive system are the fallopian tubes. 4. The reproductive organs in the female produce a sex cell called an ovum. 5. The uterus is an accessory organ of the female reproductive system.