Briefly describe how a phagocyte engulfs and ingests a pathogen
What will be an ideal response?
Answer: Phagocytes trap pathogens on surfaces such as blood vessel walls or fibrin clots. The membrane surrounding the pathogen pinches off and forms a phagosome, which moves inside the phagocyte and fuses with a lysosome to form a phagolysosome. The toxic substances and enzymes inside the phagolysosome usually kill and digest the engulfed microbial cell.
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In Duchenne muscular dystrophy, which
protein is directly affected?
a. myosin b. actin c. dystrophin d. myoglobin e. hemoglobin
Which of the following interferes with the reuptake of neurotransmitters?
A) Valium® B) Librium® C) Botox® D) Prozac® E) curare
An example of an animal with an incomplete gut is a(n)
A. planarian. B. earthworm. C. squid. D. human. E. grasshopper.
Mammals
A) evolved from birds. B) all give birth to live young. C) all lay eggs. D) have hair and mammary glands.