The vertebral column of most people contains ________ cervical vertebrae, ________ thoracic vertebrae, and ________ lumbar vertebrae.

A) 5; 7; 12
B) 6; 12; 4
C) 7; 12; 5
D) 5; 11; 5
E) 12; 7; 5

Compounds released from cells that influence the same cell are called ________.

A) paracrine chemical messengers
B) steroidal hormones
C) neuropeptides
D) tropic hormones
E) autocrine chemical messengers