Sleep deprivation increases levels of the stress hormone which stimulates the body to make

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur