The parts of the brain where addiction arises are
A) the suprachiasmatic nuclei, the ventricles, and the cerebral cortex.
B) the nucleus accumbens, the ventral tegmental area, and the prefrontal cortex.
C) the frontal medulla, the cerebellum, and the hypothalamus.
D) the presynaptic neuron, postsynaptic neuron, and synapse.
B) the nucleus accumbens, the ventral tegmental area, and the prefrontal cortex.
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Most of the oxygen carried by the blood is
A. dissolved in the plasma. B. bound to hemoglobin molecules. C. present as tiny bubbles in the blood. D. part of sugar molecules.
When foreign HLA antigens are presented by antigen-presenting cells to T cells, this is known as:
A) direct allorecognition B) indirect allorecognition C) minor histocompatibility recognition D) acute rejection
Horses and donkeys mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism is involved here to prevent horses and donkeys from becoming a single species?
A) gametic isolation B) hybrid infertility C) behavioral isolation D) mechanical isolation
Which of the following best describes sensory receptors?
A) Sensory receptors work through efferent pathways. B) Sensory receptors translate action potentials into stimuli. C) Sensory receptors interpret sensation. D) Sensory receptors translate stimulation into action potentials.