Research has shown that taking extra vitamins after exhaustive exercise A. helps repair oxidative damage that occurs during exercise. B. replaces vitamins depleted during exercise. C. has no real benefit. D. can repair muscle damage.

Answer:

d. immune system

Explanation:

Depending on the nature of the infectious agent, the immune response will use its most effective resources. In viral infections different mechanisms develop, both against the free virus and against the infected cell.

Viruses need the cellular machinery they infect to synthesize their proteins. They are intracellular parasites that depend on the infected cell to be able to carry out their replication. Viruses generally have very simple forms, composed of proteins and a nucleic acid, although their structure and composition is very variable. They are classified by virtue of the nucleic acid they carry in: DNA and RNA viruses, and by their form and structure in different families

The most active natural response mechanisms against viral infections are mediated by interferon and the activation of NK cells. These mechanisms are more directed towards infected cells.

Interferon is a cytokine of which three types are known, called: α, β and γ. The first two are mainly produced by monocyte-macrophages and to a lesser extent by fibroblasts, while interferon γ is produced by CD4 and CD8 lymphocytes and NK cells. Interferon has a great antiviral capacity, inducing different mechanisms, such as: transient resistance of cells inducing different molecules with antiviral activity, activating genes that express antiviral proteins and increasing the expression of SLA I and SLA II.

Answer: C. Human papilloma virus (HIV).

Explanation: Cancer: human papilloma virus (HPV) causes changes in female cervix that can result on cancer.

Hope this helped. :)

Answer:

B

Explanation:

Answer:

1.C 2. D

Explanation:

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