In which organ does the maturation of T cells take place
a) spleen
b) lymph node
c) red bone marrow
d) thymus
e) pancreas
Answer: d) thymus
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If you were to use antibodies that were chemically bonded to a stain in order to visualize the expression pattern of a protein in a fixed tissue, what experimental techniques and equipment would be applicable?
A. antibody interference assay, bright-field microscopy B. immunohistochemistry, dark-field microscopy C. immunohistochemistry, bright-field microscopy D. DAPI or Hoechst stains, fluorescence microscopy
____ is one of the substances that maintains our blood pH between 7.35 and 7.45
a. Water b. Carbonic acid c. Hydrochloric acid d. Hydrogen peroxide e. Sodium hydroxide
Every node in a phylogenetic tree represents a(n) ________
A) common ancestor B) extinction event C) transitional form D) sister species
Ions diffuse across membranes through specific ion channels down _____
A) their chemical gradients B) their concentration gradients C) the electrical gradients D) their electrochemical gradients