Which of the following medications for bronchoscopy provides pain relief and suppresses coughing during the procedure?

How do cells get from the bone marrow into peripheral circulation?

a. Stem cells escape the bone marrow and mature in peripheral circulation. b. Mature cells attach to a carrier protein for transport. c. Capillaries flow into the marrow and pluck out precursor cells. d. Mature cells squeeze through spaces in the vessel endothelial lining.

The eyepieces of a microscope are called the ________. 

Fill in the blank(s) with the appropriate word(s).