Which of the following competes with a natural messenger and stimulates a receptor?
A) an agonist
B) an antagonist
C) both a and b
D) neither a nor b
A
You might also like to view...
Until the Industrial Revolution of the late 1700s, the volume and velocity of world trade were constrained by technologies limited to those based on
A) wood, wind and water. B) coal, steel and rail. C) oil, plastics and roads. D) human labor and animal power.
The ________ is measured in cross-sectional view as the angle of inclination from horizontal of a tilted rock layer, and ________ is viewed in map view as the compass bearing of the rock layer where it intersects a horizontal plane.
A. strike; dip B. strike and dip; strike and dip C. dip; dip D. strike; strike E. dip; strike
What is the mass number of the element produced when an element with mass number A emits a positron?
A) A __ 2 B) A __ 1 C) A D) A + 1
List the two broad, traditional subject areas of geologic study
What will be an ideal response?