Which of the four curves of the adult vertebral column develop as an infant begins to lift its head?
A) pelvic
B) thoracic
C) cervical
D) lumbar
Ans: C) cervical
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Which of the following does not describe actions of interferon (IFN)?
A) IFN binds to normal, uninfected cells stimulating the activation of genes that produce anti-viral proteins. B) IFN can penetrate the viral capsid and destroy the virus. C) Virally infected cells can release interferon which attracts NK cells to attack and kill the IFN secreting cell. D) IFN will attract macrophages to the secreting cell to be removed by phagocytosis.
The rough endoplasmic reticulum
a. is in direct contact with certain nonmembranous organelles b. synthesizes lipids for secretion c. is called the sarcoplasmic reticulum in muscle cells d. transports proteins to its bound ribosomes e. exhibits all of the above characteristics
Sudoriferous glands and ________ glands are examples of exocrine glands in the skin.
Fill in the blank(s) with the appropriate word(s).
A cell junction that allows movement of molecules between the cytoplasm of adjacent of cells is a:
a. desmosome b. tight junction c. intermediate junction d. gap junction