Learning an individual's name requires:
A. Sprouting
B. LTP
C. Habituation
D. Central chromatolysis
ANS: B
Rationale: Experience-dependent plasticity requires the synthesis of new proteins, the growth of new synapses, and the modification of existing synapses. With repetition of a specific stimulus or the paring of presynaptic and postsynaptic firing, the synthesis and activation of proteins alter the neuron's excitability and promote or inhibit the growth of new synapses, especially at dendritic spines. Several mechanisms of experience-dependent plasticity occur, depending on the type of synapse and location involved; LTP is one of these mechanisms.
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Many vaccines now in development will include highly purified, recombinant, or synthetic peptide antigens
These vaccine antigens are expected to stimulate highly specific immune responses, but they are less immunogenic than vaccines containing intact killed or live microbes. Adjuvants are substances added to such vaccines to enhance their ability to elicit T cell immune responses. Which of the following statements about adjuvants is NOT correct? A. Adjuvants induce local inflammation, thereby increasing the number of antigen-presenting cells (APCs) at the site of immunization. B. Adjuvants stimulate the expression of costimulators on local APCs. C. Adjuvants enhance local production of cytokines that promote T cell activation. D. Adjuvants prolong the expression of peptide-MHC complexes on the surface of APCs. E. Adjuvants bind to T cell antigen receptors and promote their proliferation.
A medical term that means urethral pain is ________
Fill in the blank(s) with correct word
If left untreated, high blood pressure in pregnancy can lead to which of the following conditions?
A) preeclampsia B) placenta previa C) pre-term birth D) a low birth weight baby
________ is defined as the body's total amount of fat-free tissue
A) Body composition B) Body weight C) Obesity D) Lean body mass