In the nervous system, integration ________
A) occurs at the axon
B) inevitably results in the attainment of a threshold potential
C) is the analysis and interpretation of sensory signals and the formulation of appropriate responses
D) is the assimilation of memories
C
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Cells communicate with each other by various mechanisms. All of the following are examples of ways
cells communicate EXCEPT ____.
a. gap junctions b. transfer chain proteins c. recognition of specific membrane surface molecules d. cell adhesion molecules e. chemical messengers
CO2 and H2O will not form glucose on their own
because a. CO2 does not contain sufficient energy. b. H2O does not contain sufficient energy. c. neither CO2 nor H2O contain sufficient energy. d. the concentration of CO2 is too low in the atmosphere. e. the bonds of CO2 and H2O are too stable to be broken without an input of energy.
An agricultural worker experiences difficulty breathing which becomes progressively worse. Tests show inflammation and damage of the lung tissue, but IgE antibodies and granulocytes are in the normal ranges. With which disorder of the immune system are these signs and symptoms consistent?
A) allergic reaction B) type III (immune complex-mediated) hypersensitivity C) type IV (delayed) hypersensitivity D) autoimmunity E) acquired immunodeficiency
What is the typical gene density per kilobase in prokaryotes?
A) 426,000 B) 3000 C) 12 D) 1 E) 1200