Which option correctly pairs an endocrine gland or hormone with an aspect of metabolism that it regulates?
A) parathyroid—stimulates the adrenal cortex to secrete glucocorticoids
B) pancreas—stimulates growth of the uterine lining
C) insulin—regulates blood glucose levels
D) prolactin—manages blood potassium levels
Answer: C
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Organic molecules have a carbon backbone and _____ such as -OH and -NH2 that affect their chemical properties.
A. chemical groups B. R groups C. extension groups D. functional groups
What is the force-generating mechanism of the contractile ring?
a) sliding myosin filaments over one another with the aid of actin b) the sliding of tubulin subunits c) the shortening of actin filaments by disassembly d) the sliding of actin filaments over one another with the aid of myosin
Which of the following is a microbial product used to reduce crop damage?
A) Bt toxin B) saxitoxin C) ice-minus D) both Bt toxin and ice-minus E) both Bt toxin and saxitoxin
Please choose the answer that indicates the significance of E. coli O157:H7 to test your understanding of this organism.
A) It is the only strain of E. coli that produces the toxin that causes endotoxic shock. B) It is the most common opportunistic pathogen in the hospital setting. C) It has been linked to various forms of cancer and autoimmune diseases. D) Its role in food-borne illness outbreaks has prompted random testing and required labeling of meat products.