Cell Specialization and Body Systems

What is an accurate description of the degree of specialization that occurs in various levels of structure in the human body?

• Most cells in the human body are specialized, and tissues are groups of specialized cells that work together to perform the same function.

• Most cells in the human body are specialized, but tissues do not have specialized functions aside from certain nerve, digestive, and excretory tissues.

• Most cells in the human body are unspecialized, and they never become specialized unless transplanted from one tissue type into another.

• Most cells in the human body are unspecialized, but they can perform certain types of functions when organized together into tissues.

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Which level of structural organization does the circled portion represent?

• cell

• organ

• system

• tissue

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The heart is a muscular structure that pumps blood thorough blood vessels to all parts of the body. Which level of organization do heart, blood, and blood vessels together represent?

• cell

• organ

• system

• tissue

A teacher shows a diagram with tow levels of structural organization within a human body. The students are asked to describe the characteristics of the levels of organization shown.

• P is the most complex level of structural organization

  Q is the basic unit of structure and function in the human body.

• P is the basic unit of structure and function in the human body.

  Q is the most complex level of structural organization.

• P is a more complex level of organization than Q.

  Q is a group of specialized cells that work together.

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Cell Specialization in multicellular organisms allow cells to...

• Reproduce

• Respond to their Environment

• Be less complex

• Perform different functions

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Why does a human require specialized cells to live?

• Specialized cells allow humans to adapt to changes in their environment.

• Human bodies have several body systems which require cells with different functions/jobs.

• Specialized cells allow for all life processes to occur in one cell.

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Although all of the cells of a plant contain the

same genetic material, root cells and leaf cells are

not identical because they

• select different cells to express

• delete different sections of their enzymes

• use different genetic bases for the synthesis

  of DNA

• use different parts of their genetic instructions

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The process in which cells become specialized to perform specific functions is called:

• differentiation

• cell cycle

• cytokinesis

• mitosis

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Why do humans require MANY types of cells to survive?

• Human cells are all identical and work together to do similar functions.

• Human cells are specialized and work together to do DIFFERENT functions.

• Human cells are specialized and work together to do the same function

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These organisms can have specialized cells.

• eukaryotic

• prokaryotic

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