Which function correctly relates with the type of tissue?
a. contraction of the heart : skeletal muscle tissue
b. constriction of blood vessels : voluntary muscle tissue
c. insulation of the body : nervous tissue
d. stomach acid secretion in the digestive tract : epithelial tissue

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

In which ways are mercury and venus similar?