Addictive drugs, as well as nicotine, activate dopamine release in the ________.
A. corpus callosum
B. nucleus accumbens
C. corpus striatum
D. basal nuclei
Answer: B
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What is the correct relationship between receptor tyrosine kinases and Ras proteins?
A) Phosphorylated Ras proteins activate the tyrosine kinase. B) Phosphorylated Ras proteins pair with a tyrosine kinase to activate other proteins. C) Tyrosine kinase dimers phosphorylate the Ras proteins directly. D) Tyrosine kinase dimers use GAPs and GNRPs to regulate Ras proteins.
Which of the following is composed of epithelial tissue?
a. epidermis b. dermis
The spinal tract that relays information concerning crude touch and pressure to the CNS is the
A) corticospinal pathway. B) posterior column pathway. C) spinocerebellar pathway. D) lateral spinothalamic tract of the spinothalamic pathway. E) anterior spinothalamic tract of the spinothalamic pathway.
A sign of aging of the muscular system is
A. excess ATP. B. decreased supplies of myoglobin. C. expansion of muscle fiber diameters. D. increased creatine phosphate.