Which of the following is most likely a correlation coefficient for a relationship between stress and health?

Which of the following would NOT be classified as an external, social frustration?

a. My sister wore one of my dresses, when I wanted to wear it. b. My goal is to go to medical school, but I have earned only D's. c. My supervisor was unfair to the staff when he promoted his friend rather than making the promotion based on seniority and productivity. d. My history professor requires twice as many written reports as the other history professors.

The two descending __________ motor pathways control movements of the trunk

Fill in the blank with the appropriate word.