Explain why cell division is important
What will be an ideal response?
Cell division is important because it is essential to survival. Aging and environmental stressors damage cells. Cellular division replaces old and damaged cells.
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Answer the following statements true (T) or false (F)
1. The presence of a neurilemma is necessary for the repair of an injured neuron. 2. Oligodendrocytes and Schwann cells have the same function but in different parts of the nervous system. 3. The terms nerve and neuron mean the same thing. 4. A ganglion is a group of cell bodies located in the central nervous system. 5. Saltatory conduction occurs only in myelinated neurons.
For air to flow into or out of the lungs, there must be
A. a volume gradient established between the atmosphere and the alveoli. B. a temperature gradient between the atmosphere and the alveoli. C. a diffusion gradient between the atmosphere and the alveoli. D. a pressure gradient established between the atmosphere and the alveoli. E. None of the choices are correct.
Many gyms feature weightlifting machines called "adductor machines" that are used to strengthen the thighs. If you were to work out on one of these, what would you be doing?
A) twisting both thighs to the left, then to the right B) lifting both thighs upward C) pushing both thighs outward, separating your knees as far as you can D) pulling both thighs inward toward a center point, bringing your knees together E) None of the answers is correct.
Which of the following would take the least time to digest within the gastrointestinal tract?
A) Dipeptide B) Amino acid C) Tripeptide D) Protein