There are two main complement activation pathways (not including the lectin pathway).  What is the primary difference between the alternative and classical complement pathways?

Which of the following occur during growth hormone signaling?

 In a healthy heart, pacemaker cells in the ________ primarily regulate cardiac autorhythmicity. 

Why can cytotoxic T-cells kill infected cells in adaptive immunity?

Which of the following would be expected to increase blood pressure? 

Which of the following can be absorbed from the lumen of the intestine into the blood without further digestion? 

You compete in the steeplechase event in track and field. This requires skill and coordination. Your coordinated movement and endurance require many different types of muscle. Which of the following is not an accurate description of specific muscle fiber types? 

Which of the following are true about hypoxia inducible factor-1 alpha (HIF1-alpha)? (Select all that apply.)

True or false: Blood clotting can occur through either intrinsic or extrinsic pathways. Regardless, the end result of successful signaling of either pathway is conversion of fibrinogen to fibrin to create a fibrin mesh. 

In the hypothalamus, what is the hormone that is produced to help stimulate the production of testosterone?