A graded response occurs when ________.
A. multiple muscles in a group are activated
B. an individual muscle cell undergoes an all-or-none response
C. multiple motor units are activated
D. None of the choices are correct.
Answer: C
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Each individual ____ is composed of the cuticle, the cortex, and the medulla
a. hair b. arrector pili c. skin d. nail
Along with the ribs and sternum, what other bones make up the thoracic cage?
A) 7 cervical vertebrae B) 12 thoracic vertebrae C) 5 lumbar vertebrae D) 7 cervical and 12 thoracic vertebrae E) 12 thoracic and 5 lumbar vertebrae
The abnormal condition of air in the pleural cavity is known as:
a. pleurisy b. lung cancer c. pneumothorax d. pulmonary edema e. congestive failure
Chromosome pairs are called ________.
A. haploid B. loci C. genomes D. homologous pairs E. karyotypes