What is the signal for a vesicle storing peptide hormone to move to the plasma membrane and release contents of vesicle?
a. activation of an integrin receptor
b. activation of a g-protein
c. activation of an enzyme linked receptor
d. increase in [ca++]i
e. increase in [na+]i

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Nh3 +02-no + h20 is unbalanced what is the balanced equation