★ Lymphatic System Quiz
To what part of the lymphatic system is the arrow pointing?
A. Thymus
B. Lymph nodes
C. Tonsils
Select your answer:

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Urinary System › ViewThe medulla, cortex and pelvis are all part of the
A. nervous system
B. nephron
C. kidney
D. excretory system
Enzymes › View
What happens to enzyme function at pH values away from the optimum?
A. The rate increases
B. The rate remains constant
C. The rate drops rapidly
D. The rate becomes unstable