The continuous release of mucus by the epithelial cells lining the respiratory tract is an example of
A) regulated secretion.
B) constitutive secretion.
C) the mucus response.
D) clathrin-coated pit formation.
E) phagocytosis.
Answer: B
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In the spiral staircase analogy of DNA structure, each railing represents a _______________________
A. sugar-phosphate backbone, and each step represents a pair of nitrogenous bases B. sugar-phosphate backbone, and each step represents a nitrogenous base C. nitrogenous base, and the steps represent the sugar-phosphate backbone of the DNA molecule
In vertebrates, the central nervous system (CNS) consists of the ____
a. brain and spinal cord b. brain and gray matter c. spinal cord and gray matter d. brain and reflexes e. spinal cord and nerves
what is the pathophysiology of diphtheria toxin?
What will be an ideal response?
Which of these structures are used by bacteriophages to attach to host cell receptors?
A. nucleic acid B. sheath C. tail fibers D. capsid head