A skateboarder falls and lands directly on his buttocks and lower back. He does not feel much pain and continues skating. After a couple of days he begins experiencing right hip pain and notices his right foot and leg are rotated to the right. A doctor diagnoses a muscle spasm. Which of the following muscles is most likely causing the leg and foot rotation?
A. Quadratus lumborum
B. Tibialis posterior
C. Piriformis
D. Adductor longus
E. Sacrospinalis
C. Piriformis
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Natural _________ cells are large lymphocytes that function in nonspecific defense and that provide important defense against cancer.
Fill in the blank(s) with the appropriate word(s).
Describe how helper T cells become activated when interacting with macrophages, and then how helper T cells promote clonal development of B cells and cytotoxic T cells. Include in your answer the following: MHC-11, CD4, and TCR
What will be an ideal response?
The opposite of depression is ________.
A. inversion B. pronation C. flexion D. protraction E. elevation
Which of the following types of white blood cells is likely to increase in number in a person with cancer, chicken pox, or hypothyroidism?
A. Eosinophils B. Basophils C. Lymphocytes D. Monocytes E. Neutrophils