The middle layer of membranes surrounding the brain and spinal column is the:
a. dura mater.
b. meninges.
c. arachnoid.
d. pia mater.
C
Because of the vital and essential role of the CNS in the body's regulatory processes, the brain and spinal cord have two protective coverings: an outer covering consisting of bone and an inner covering of membranes called the meninges. The meninges is a collective term for three distinct layers surrounding the brain and spinal column—the dura mater (outermost membrane layer), the arachnoid, and the pia mater (innermost membrane layer).
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A(n) ____________________ is the interacting populations of all the species in a habitat. Fill in the blank(s) with the appropriate word(s)
The mathematical model developed by Wayne Getz predicts the existence of asexual or sexual reproduction within a
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Which of the following bacteria was carried by Typhoid Mary in the 1900s?
A) Klebsiella pneumoniae B) Pseudomonas aeruginosa C) Salmonella typhi D) Staphylococcus aureus E) Escherichia coli
Microbial infection damages hosts by
A) toxins, exoenzymes, induction of immune response. B) attachment, invasion, endotoxin production. C) erythrocytes, phagocytes, disintegration. D) toxigenicity, autoimmunity, overactivity of immune system.