Acquired immunity involves both a humoral immune response and a cell-mediated immune response.
Match the items with appropriate categories depending on whether they are involved in the humoral response, the cell-mediated response, or both the humoral and the cell-mediated responses.

1. antigen-presenting cells
2. plasma cell
3. memory cells
4. antibodies
5. b cells
6. helper T cells and cytokinesis
7. cytotoxic T cells

The categories are humoral response, cell-mediated response, and both.

1. antigen-presenting cells.( both the humoral and the cell-mediated responses.)

2. plasma cell ( humoral response)

3. memory cells ( both the humoral and the cell-mediated responses.)

4. antibodies ( humoral response)

5. b cells ( humoral response)

6. helper T cells and cytokinesis ( both the humoral and the cell-mediated responses.)

7. cytotoxic T cells (the cell-mediated responses.)

Explanation:

Acquired immune responses against microbe are not present at birth and before the first entry of the microbes into the host. The acquired immune responses are induced by the microbe upon its first entry into the host. It is divided into two:

- the humoral immune response: this is the immune response mediated primarily by antibodies produced by B lymphocytes. The activation of B cells is influenced by T helper cells.

- the cell mediated immune response: this is the immune response mediated primarily by T lymphocytes and macrophages. The naive T cells are expressed in two different ways; the T helper cells ( CD4+) and the cytotoxic T cells( CD 8+). The cytotoxic T cells directly kills infected cells by apoptosis and emit cytokines to amplify the immune response.

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