Match the following. 1. exercise that requires the use of oxygen to produce energy
anaerobic
2. exercise that does not require the use of oxygen to metabolize energy adenosine
triphosphate
3. amount of time needed to perform an exercise
aerobic
4. a product of anaerobic exercise
duration
5. how often an exercise is performed
mode
6. an energy molecule produced when oxygen reacts with glucose
frequency
7. type of exercise
intensity
8. level of effort needed to perform an exercise
lactic acid

Will treating a viral infection with antibiotics affect the course of the infection? a) no; antibiotics work by inhibiting enzymes specific to bacteria. antibiotics have no effect on eukaryotic or virally encoded enzymes. b) no; antibiotics do not kill viruses because viruses do not have dna or rna. c) yes; antibiotics activate the immune system, and this decreases the severity of the infection. d) yes; antibiotics can prevent viral entry into the cell by binding to host-receptor proteins.