The primary difference between active and passive immunity is that in active immunity, antibodies are produced in response to the presence of an antigen, while in passive immunity, pre-formed antibodies are provided from one person to another.
Answer the following statement true (T) or false (F)
True
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Which bone forms the posterior floor and wall of the skull?
A) frontal B) occipital C) parietal bones D) temporal bones
The scalenes have their origin on the
A) transverse and costal processes of cervical vertebrae. B) inferior border of the previous rib. C) superior border of the next rib. D) cartilages of the ribs. E) thoracodorsal fascia and iliac crest.
During an action potential ________.
A. K+ influx causes after-hyperpolarization B. Na+ influx causes depolarization C. Na+ efflux causes depolarization D. K+ influx causes repolarization
________ tissues respond quickly to outside stimuli by means of changes in membrane potential
A) Adipose B) Connective C) Responsive D) Epithelial E) Excitable