Use the pull-down menus to insert best vocabulary term or phrase into the blanks to make the following sentences true: In the adaptive or acquired branch of your immune system, you have B cells and T cells.  When a particular clone is exposed to its specific pathogen, it will undergo rapid [blank1].  This process produces effector B-cells, called [blank2], that start to produce many antibodies that circulate in the blood.  Also, at least two kinds of effector T-cells are produced.  One type, called a [blank3], doesn’t generally combat pathogens directly, but rather stimulates and coordinates many other parts of a full-scale immune response.  Finally, if any [blank4] are produced, they will specifically release chemicals into infected cells to kill them and stop the spread of infection.

Study this figure carefully.  The letters shown are indicating time points on the graph to which they are closest.  Use the pull-down menus below it to insert the best terms to make the figure the caption true: This figure shows an action potential in a [blank1] cell of the heart.  At the section just below the “A”, [blank2] causes depolarization from -60 mV towards threshold.  At the point just to the right of the “B”, a rapid [blank3] is occurring and causes the depolarization phase of this action potential.  After these channels close, another set of channels will allow [blank4] during the phase to the left of the “C”, which triggers repolarization of the cell.

Use the pull-down menus to insert vocabulary terms into the blanks that best complete the following sentences: Cells of the immune system mature in [blank1] tissues.  For example, T-cells mature in the [blank2].  By contrast, mature immune cells live long-term and screen body fluids for pathogens in [blank3] tissues.  An example of this is the [blank4], which houses mature immune cells and monitors the blood for pathogens.

These pathogens can have either RNA or DNA as their core genetic material.

Which of the following is NOT a controllable factor in avoiding cardiovascular disease?

If hydrostatic pressure is greater than colloid osmotic pressure at a capillary bed, then __________ will occur.

Swan Textiles Inc. produces and sells a decorative pillow for $98.00 per unit. In the first month of operation, 2,300 units were produced and 1,800 units were sold. Actual fixed costs are the same as the amount budgeted for the month. Other information for the month includes:           Variable manufacturing costs    $23.00 per unit         Variable marketing costs        $6.00 per unit         Fixed manufacturing costs        $15 per unit         Administrative expenses, all fixed        $21.00 per unit         Ending inventories:            Direct materials           -0-            WIP                               -0-            Finished goods           500 units   What is the contribution margin using variable costing?

Which of the following would be considered a normal blood pressure reading for an adult, seated at rest?

Matching:  Match the age group on the left with the recommended hours of sleep on the right. 

Which of the following statements about directional terms is NOT correct?