Natural killer cells are part of the adaptive immune system.

The pineal gland is responsible for regulating sleep-wake cycles. 

Examine the image provided and identify the condition shown. Image 1

Which phase of the cardiac cycle involves the contraction of the ventricles?

Which type of cell is responsible for generating and spreading electrical impulses in the heart?

Cardiac muscle cells are multinucleated like skeletal muscle cells.  

Trace the pathway of blood through the circulatory system, beginning at the right atrium. Name all the chambers and valves involved.

Analyze the image provided and Identify the condition depicted. (1 mark) Briefly define the condition  (2 marks) Picture1.png

Which cells are primarily responsible for producing antibodies?

Which of the following is most likely to produce anaphylaxis in a susceptible individual?