Which of the following supplies a rich network of blood vessels that provides nutrients and oxygen to the superficial tissues of the brain and spinal cord?                 a.  meninges      b.  blood-brain barrier      c.  brain stem      d.  cerebrospinal fluid?

Victoria enjoys laughing with her friends as they walk around the track after school which best describes her heart rate during this activity

Which of the following best reflects what we know about how the flu virus moves between species? a) the flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.b) a flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.c) an influenza virus gains new sequences of dna from another virus, such as a herpesvirus; this enables it to be transmitted to a human host.d) an animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.

What can you do to support your own mental health and physical health?