If I tested your intestinal fluid and found that it was basic, which of the pH values listed would best describe this solution?
A) 6.8 B) 3.2 C) 8.0 D) 1.2
Answer: C
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A seedling no longer needs its stored food sources once it develops
a. an embryo. b. cotyledons. c. leaves. d. roots.
In a single sodium-potassium pump cycle, ATP is used with the result that
A. 3 sodium ions enter and 2 potassium ions leave. B. 2 sodium ion enters and 1 potassium ion leaves. C. sodium and potassium ions enter and water leaves. D. 2 sodium ion leaves and 1 potassium ion enters. E. 3 sodium ions leave and 2 potassium ions enter.
Carbon monoxide can be released by brain cells and stimulates
a. adenylate cyclase and blood vessel contraction. b. guanylate cyclase and blood vessel dilation. c. NO-synthase and muscle cell contraction. d. cyclooxygenase and prostaglandin synthesis.
Which of the following describes the classical pathway of complement activation?
A) Complement proteins activate when mannose-binding lectin binds to the pathogen. B) Complement proteins activate by coming into contact with certain blood-clotting proteins. C) Complement proteins activate when triggered by macrophages or neutrophils. D) Complement proteins activate when antibodies bind to a pathogen. E) Complement proteins activate by directly interacting with the pathogen.