What must your skeletal muscles do in order to move? a. engage their fibers slowly b. twitch involuntarily c. separate from the bone d. contract and relax

How is the structure of our circulatory system and respiratory system related to the function of both these systems?

In 1996 california legalized the medical use of marijuana, even though it was still illegal under federal law. californians angel raich and diane monson used medical marijuana that they grew on their own property. when federal agents destroyed their plants, monson and raich sued, claiming, among other things, that the commerce clause did not permit the federal government to regulate activities that took place in their back yards and homes. the federal government argued that since consuming locally-grown marijuana for medical purposes affects the interstate market for marijuana, the federal government may regulate—and prohibit—such consumption. whose argument should prevail?

Which type of nerve creates a 'mental map" of the relative positioning of the body at any given point in time?