Blood flows out from the ____ and into the aorta

Which of the following is true regarding the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints of the digits two through five?

a. They are not true synovial joints. b. They do not have any collateral ligaments to resist valgus and varus stresses. c. The proximal articulating surface is larger than the distal articulating surface. d. They are biaxial joints with two degrees of freedom.

A characteristic of a mutual agreement is that ____. 

A. the patient is billed for payment in full monthly, but may make whatever payment is possible B. it is never regulated by the Truth in Lending Act C. the physician and the patient agree on how much each month's payment will be D. finance charges are always applied E. it is generally set up by a collection agency