The _______ cells in the islets of Langerhans of the pancreas are responsible for secreting insulin.
a. alpha cells
c. chief cells
b. beta cells
d. leukocytes
Ans: b. beta cells
Biology & Microbiology
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Which organ of the gastrointestinal tract has a large commensal population of microorganisms?
A. Large intestine B. Small intestine C. Pancreas D. Liver E. Salivary glands
Biology & Microbiology
The concept of homeostasis originated with:
A. James Watson. B. Charles Darwin. C. Gregor Mendel. D. Claude Bernard. E. Rosalind Franklin.
Biology & Microbiology
A(n) ________ operon is one whose transcription is repressed by effector molecules.
A. activated B. repressible C. inducible D. coinducible E. compressible
Biology & Microbiology
Growth-factor stimulation of the Ras/Raf/ERK pathway initially stimulates the synthesis of cyclin
a. A. b. B. c. C. d. D.
Biology & Microbiology