★ Blood types and Blood Components Quiz
Which blood type is the universal donor?
A. Type A
B. Type B
C. Type AB
D. Type O
Select your answer:
Topics:
HNBS Intern Principles of Microbiology DNA Replication Components of Food Musculoskeletal Injuries & Workstation Design Properties of Hair and Scalp ICU 3M Micropara Skull Anatomy and Histology of Stomach Reproduction in Human Beings Genetic Engineering The Cardiovascular System: Blood Vessels and Hemodynamics Bone Physiology Musculoskeletal LEOther quiz:
Microbiology › ViewCytotoxic T cells
A. secrete granzymes and perforins that damage target cells.
B. lack specificity for antigen.
C. secrete interleukin-2 to stimulate B and T cells.
D. are activated by free, soluble antigens.
Cell Bio › View
Why do solutes move through protein channels in facilitated diffusion?
A. The solutes are too big or too polar to cross the membrane alone.
B. The solutes are moving from low concentration to high concentration.
C. No molecules can pass straight through the membrane.
D. The solutes have reached equilibrium.