Answers to Revise Questions

Identify the different organelles in the human body and state their functions.

Ans: 

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Outline the stages of mitosis and meiosis.

Ans: Interphase:  between mitotic cell division, cells carry out functions. Late stage – chromosomes duplicate into two chromatids.

Prophase:  chromosomes split into two chromatids, centrioles separate to each end of the cell with the mitotic spindle between, the nuclear membrane disappears.

Metaphase: chromatids line up along the equator of the spindle attached by centromeres.

Anaphase: the spindle contracts and draws chromatids apart to ends of the cell.

Telophase: chromosomes reform, the nuclear membrane reforms, two identical daughter cells are formed.

Identify the five types of human cells, outline the different variants within each group and clarify their function.

Ans: 

  • Blood and lymph: transport substances around the body.

Blood contains:

erythrocytes that carry oxygen

leucocytes that combat infection

thrombocytes that cause blood clotting

  • Connective:

(See table here: https://edge.sagepub.com/essentialaandp/student-resources/chapter-2/answers-to-end-of-chapter-%E2%80%98revise%E2%80%99-questions)