What is the purpose of the articular processes of the vertebrae?
What will be an ideal response?
These processes (superior and inferior) allow the vertebral column to flex forward some, but lock the vertebrae if the column is flexed back. In a four-legged animal, such as a horse, these processes allow the back to remain in place while you ride it.
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The group of organic compounds containing carbon, hydrogen, and oxygen in a near 1:2:1 ratio is defined as a
A) carbohydrate. B) lipid. C) protein. D) nucleic acid. E) saturated fat.
HIV preferentially attacks cytotoxic T cells
Indicate whether the statement is true or false.
During the act of drinking water, the desire for water is usually inhibited by
A. Distension of the stomach B. Hormones secreted by stomach cells C. Changes in intracellular fluid concentration D. Changes in extracellular fluid concentration
Which of the following is NOT a difference between erythrocytes and leukocytes?
A. Leukocytes have no hemoglobin. B. Leukocytes are smaller. C. Leukocytes are translucent unless stained. D. Leukocytes have a nucleus.