In the process of ________, two substances are moved across a cell membrane in the same direction without directly using cellular energy. One of the substances can be moved against a concentration gradient by this process.
A) countertransport
B) cotransport
C) simple diffusion
D) active transport
E) co-osmosis
Question 2
The visceral pericardium is the same as the
A) mediastinum.
B) parietal pericardium.
C) epicardium.
D) myocardium.
E) endocardium.