An individual is constipated. They take magnesium salts to help loosen the stool. Why does this work?
A. Water moves from the intestines to the blood because the blood is hypertonic
B. Water moves from the intestines to the blood because the blood is hypotonic
C. Water moves from the blood to the intestines because the blood is hypertonic
D. Water moves from the blood to the intestines because the blood is hypotonic.
D
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A lizard's bobbing dewlap (a colorful flap of skin hanging from an Anolis lizard's throat) is an example of a(n) _____
A) stimulus B) reflex C) signal D) innate releasing mechanism E) structure necessary for respiration
In viral infections involving double-stranded DNA viruses, all of the viral genes are usually expressed prior to the replication of viral nucleic acid.
Answer the following statement true (T) or false (F)
Large amounts of antibodies produced for commercial use are called
a. monoclonal antibodies. b. myeloma cells. c. interferons. d. clones. e. hybridoma cells.
In Down syndrome,
a. as the age of the mother increases, the chance of the defect occurring in the unborn children increases. b. the age of the father usually has an equal influence on the defect. c. most embryos abort before complete term. d. a person with the defect cannot have a normal child. e. 80% of trisomic 21 babies are born to women over the age of 40.