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The following are the steps involved in a reflex arc. activation of a sensory neuron activation of a motor neuron response by an effector arrival of a stimulus and activation of a receptor information processing The proper sequence of these steps is

Which item is labelled #4?

Which item is labelled #5?

Antimicrobial susceptibility testing for several isolates is shown in the image below (rows A-G). Antimicrobial concentrations and controls are marked in the bottom panel of the figure. The growth control is column 11, and the sterility control is in column 12. Examine the results shown for the isolate in row C. What is the best interpretation? Gray = growth, white = no growth.

How many units of RBCs are required to raise the hematocrit of a 70kg man from 21% to 30%? 

A flat, colorless colony is isolated on MacConkey from a stool specimen. The isolate has an Alkaline/Acid reaction on TSI with gas and abundant H2S production.  The citrate utilization test, ornithine and lysine decarboxylation tests, and methyl red tests are all positive.  The laboratory scientist should report:

Which immunoglobulins can initiate the alternate pathway of the complement system although this pathway is usually antibody independent?

Which immunoglobulins can initiate the alternate pathway of the complement system although this pathway is usually antibody independent?

A hospitalized patient is experiencing increased neuromuscular irritability (tetany).  Which of the following tests should be ordered immediately?

Approximately how many random ABO compatible donors would need to be screened to find 3 units of compatible blood for a patient with anti-S and anti-Jkb? Antigen Frequency: S+ 55%; Jk(b+) 73%