The observation that prostate cancer metastasis to bone is associated with increased osteoblast activity is supported by the finding that serum levels of markers of osteoblast proliferation, such as bone-specific alkaline phosphatase, are increased in patients with metastatic prostate cancer.
Mostly, animals get eaten by lions, not the other way around. Thatâs because lions are at the top of their food chain, and at the very center of their food web. Lions have almost no predators. However, old, sick lions are sometimes attacked, killed and eaten by hyenas. And very young lions can be killed by hyenas, leopards and other predators when they are not being watched carefully by their mothers. But a healthy adult lion has little to fear from any other animal.
These are primary consumers (i.e. they eat plants), thus unless a lion eats a hunting animal (in rare instances, lions may hunt each other if food is scarce though this is the exception, not the rule) it is a secondary consumer.