Briefly discuss the complementary functional roles of insulin and glucagon. What will be an ideal response?
High blood sugar stimulates the beta cells of the pancreas to secrete insulin which reduces
blood sugar levels. When blood levels drop, pancreatic alpha cells produce glucagon to
increase blood sugar.
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Thick filaments are parallel bundles of ____ molecules
a. actin b. tropomyosin c. acetylcholine d. myosin e. troponin
Root nodules and legumes are a good example of a(n)
a. symbiotic relationship. b. amensalistic relationship. c. commensal relationship. d. parasitic relationship. e. abiotic relationship.
A 25-year-old woman has just had the Implanon or Nexplanon system inserted for contraception. Six months later, she is concerned because she is not menstruating. This is ________, and the reason is that she has an increased level of ________
A) normal; progesterone B) abnormal; follicle stimulating hormone (FSH) C) normal; estrogen D) abnormal; luteinizing hormone (LH)
DNA microarray analysis is excellent for ________
A) studying all of a sample's genes simultaneously B) studying one gene's expression very closely C) studying all of a sample's expressed genes simultaneously D) studying all of a sample's unexpressed genes simultaneously