Information is processed and sensory input and motor responses are integrated in the
a. medulla.
b. thalamus.
c. pons.
d. cerebellum.
e. cerebrum.
E
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Which of the following statements is false?
a. Hemoglobin functions as a buffer. b. Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma. c. The movement of molecules go in different directions in the metabolically active tissues and the alveoli. d. Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin. e. Hemoglobin consists of four polypeptide chains.
Hair-like canals that connect lacunae to each other and to central canal
What will be an ideal response?
If you were unable to produce tears:a
you would be more vulnerable to infections by gram negative bacteria. b. you would not produce lysozyme. c. your level of defensins would be decreased. d. you would lose a first line of defense against bacteria. e. you would not produce lysozyme, and you would be more vulnerable to infections by gram-positive bacteria
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?
a. Natural selection and genetic drift b. Mutation and gene flow c. Natural selection and gene flow d. Gene flow and genetic drift