Which of the following substances is the end product of nitrogen metabolism?
A. Nitrites
B. Urea
C. Urine
D. Ammonia
E. Nitrates
Answer: B
Health & Biomechanics
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A pro-time indicates how many days circulating red blood cells survive before they are removed by the spleen
Indicate whether the statement is true or false
Health & Biomechanics
The turning-off of the body’s response to stress is called the ________ response.
Fill in the blank(s) with the appropriate word(s).
Health & Biomechanics
Which proteins on the antigen-presenting cell are recognized by the helper T-cell?
CD8 receptors MHC proteins IL-1 receptors IL-2 receptors
Health & Biomechanics
What is produced by the process of clonal expansion?
Plasma cells, T cells, and memory B cells Plasma cells Plasma cells and memory B cells Memory B cells
Health & Biomechanics