What step of inflammation is enhanced by the presence of opsonins?
A) the clearance of the infection by phagocytosis
B) when foreign matter is contained
C) when capillaries dilate and become more permeable
D) when macrophages engulf debris and foreign matter
E) when additional leukocytes are recruited to the region
Answer: A) the clearance of the infection by phagocytosis
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Which cells in the root have a suberin layer called the Casparian strip?
A. endodermis B. pericycle C. cortex D. epidermis E. root hair
A gemma is a(n) sexual reproductive structure produced by certain liverworts
____________________ Indicate whether the statement is true or false.
The ability of some viruses to remain inactive (latent) for a period of time is exemplified by _____
A) influenza, a particular strain of which returns every 10-20 years B) herpes simplex viruses (oral or genital) whose reproduction is triggered by physiological or emotional stress in the host C) Kaposi's sarcoma, which causes a skin cancer in people with AIDS but rarely in those not infected by HIV D) the virus that causes a form of the common cold, which recurs in patients many times in their lives
Which is true of interneurons?
A. They detect stimuli. B. They receive and send signals. C. They control muscles. D. They control glands. E. They have a long axon.