They be like clay why u walk like that why u talk like that

What body systems are involded in sleep homeostasis

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Which method of administration would result in the highest concentration of the drug in the brain?