Ketika kita berjalan, secara refleks tangan dan kaki kita bergerak seiring dan seirama. Gerakan itu disebabkan antara tulang yang satu dan tulang yang lain terjadi hubungan yang disebut sendi. Jenis sendi yang digunakan pada saat berjalan adalah A. sendi pelana dan sendi engsel
B. sendi engsel dan sendi peluru
C. sendi putar dan sendi pelana
D. sendi peluru dan sendi putar

jawabnnya :

B. sendi engsel dan sendi peluruh

( ciee ketauhan liat "" )

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.