In the small intestine, food molecules pass from the lumen of the intestine into the individual cells lining the intestine and then into the circulatory or lymph system of the body. If the digested molecules can leak into the abdominal cavity then ________ must have been damaged.
A. hemidesmosomes
B. desmosomes
C. tight junctions
D. gap junctions
E. focal adhesions
Answer: C
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Peroxisomes
A) are not derived from the endoplasmic reticulum. B) are bounded by double membranes. C) possess acid phosphatase activity. D) possess amylase activity. E) all of the above
Plants share a most recent common ancestor with what group of protists?
A. green algae B. red algae C. brown algae D. cyanobacteria E. dinoflagellates
Through _____ , a body part of an ancestor is modified differently in different lines of descent
a. morphological divergence b. adaptive divergence c. morphological convergence d. homologous evolution e. natural selection
A(n) ________ is used clinically to measure lung volumes and rates of air flow.
A) electrocardiograph B) electroencephalogram C) ratiometer D) X-ray E) spirometer