What is meant by the term blood-brain barrier?
What will be an ideal response?
The capillary walls in the brain are more restrictive than those in other areas of the body. This limits
the substances that can pass from the bloodstream into brain tissue.
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Immunological tolerance refers to ____
a. decreased immune system response to latent viruses b. decreased immune system response to nonpathogenic bacteria c. decreased tolerance of the body for pathogens it has already encountered d. desensitization to allergens to lessen allergic responses e. protection of the body’s own molecules from attack by its immune system
The essence of meiosis is that
a. gametes receive one copy of each member of each pair of homologous chromosomes. b. diploid gametes are formed. c. each gamete receives one member of each pair of homologous chromosomes. d. haploid gametes are formed. e. each gamete receives one member of each pair of homologous chromosomes, and haploid gametes are formed.
Mating in spiders is, in many cases, accompanied by predation of females on their mating partners
The males in turn have evolved behavioral and morphological countermeasures to avoid being preyed upon. Would you calculate fitness costs for the players in these systems in a similar manner as you would when examining interspecific predator–prey interactions? What will be an ideal response?
Substances that are naturally produced by certain microorganisms that can inhibit or destroy other microorganisms are called
A) Broad-spectrum drugs B) Semisynthetic drugs C) Narrow-spectrum drugs D) Antibiotics E) Synthetic drugs