Which of the following is a correct statement about cardiac muscle?
A. Cardiac muscle cells are branched and multinucleated.
B. Cardiac muscle is smooth and involuntary.
C. Cardiac muscle is striated and voluntary.
D. Cardiac muscle is striated and involuntary.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
The portion of the adult brain that includes the cerebral peduncles, superior colliculi, and inferior colliculi is derived from which secondary brain vesicle?
A. Telencephalon B. Diencephalon C. Myelencephalon D. Metencephalon E. Mesencephalon
Flat bones contain an interior framework of _____ bone sandwiched between two layers of _____ bone.
A. spongy, compact B. compact, spongy C. cancellous, compact D. compact, cancellous
The first signal during helper T-lymphocyte activation involves
A. BCR of the helper T-cell binding with free antigen and engulfing it. B. CD4 of the helper T-cell binding with MHC class I part of the antigen fragment. C. CD4 of the helper T-cell binding with MHC class II of the antigen-presenting cell. D. CD8 of the helper T-cell binding with MHC class III of the antigen-presenting cell.