The distinguishing feature of a cervical vertebra is the
A) costal facet.
B) vertebral arch.
C) transverse foramina.
D) spinous process.
E) pedicle.
C
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Which region of the brain controls breathing?
A. Hypothalamus B. Cerebrum C. Medulla oblongata D. Occipital lobe
The perineum is inferior to the pelvic diaphragm.
Indicate whether the statement is true or false.
Match the cell type with its description.
1. These are the most abundant leukocyte; they are formed in the bone marrow. 2. Cytotoxic, these cells are associated with allergic reactions and parasitic infestations. Usually these cells are less than 3% of the leukocyte population, and only live up to 12 hours. 3. Precursors of macrophages, these cells are relatively rare in blood because they are actually in transit to some other site. 4. These cells are related to mast cells, and both release chemical mediators such as histamine and heparin, which aid in the immune response. 5. Estimated to reach populations of one trillion in normal adults, most of these cells reside in the lymphoid tissues of the body. These cells look quite similar to one another under the microscope, yet function very differently. A. lymphocytes B. neutrophils C. monocytes D. eosinophils E. basophils
The fibrous tunic consists of all of the following EXCEPT the ________
A) iris B) sclera C) cornea D) corneal limbus