In a spinal cord injury, nerve signals cannot proceed past the location of the injury. What part of the spinal cord was damaged if a person, who is quadriplegic, can move their head and neck, but not their arms, abdomen, or legs?
A. thoracic
B. lumbar
C. cervical
D. sacral
E. coccyx
C. cervical
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Which statement best describes active transport?
A. A substance goes from an area of high concentration to an area of low concentration, and this releases energy. B. A substance goes from an area of low concentration to an area of high concentration, and this releases energy. C. A substance goes from an area of high concentration to an area of low concentration, and this requires energy. D. A substance goes from an area of low concentration to an area of high concentration, and this requires energy.
Repressible genes typically regulate gene expression of enzymes involved in anabolic pathways
__________________ Indicate whether the statement is true or false.
Animal cells need oxygen most directly to:
A) produce protein. B) secrete enzymes. C) produce DNA. D) produce ATP.
Which of the following can cross the plasma membrane because of its selective permeability?
A. large, nonpolar molecules B. glycoproteins C. gases such as oxygen and carbon dioxide D. large, polar molecules E. ions