Which cells secrete surfactant?
A) alveolar macrophages
B) goblet cells
C) type II alveolar cells
D) ciliated cells
E) type I alveolar cells
Ans: C) type II alveolar cells
You might also like to view...
The three-dimensional structure of a functional protein composed of a single polypeptide chain is referred to as the ____________ structure
A. primary B. secondary C. tertiary D. quaternary
What word below characterizes the amino acids that are found in an alpha helical segment that spans a membrane?
a) totally parallel b) predominantly antiparallel c) predominantly hydrophilic d) predominantly hydrophobic e) exclusively circular
Which of the following is the correct path sperm travel on their way to fertilize an egg?
A) Uterus ? uterine tube ? cervix ? vagina B) Uterine tube ? vagina ? uterus ? cervix C) Vagina ? cervix ? uterus ? uterine tube D) Cervix ? uterine tube ? vagina ? uterus
What feature of cardiac muscle helps the cells coordinate their contraction as a single unit?
A. large numbers of motor neurons B. covalent bonds between actin and myosin molecules C. intercalated disks rich in gap junctions D. fused cells with multiple nuclei