Question

rade 6 science - biggs / unit 2: from molecules to organisms - structures and processes / topic 14: organ...

1. the nervous system includes the brain, nerves, and spinal cord. all of these parts are made up of cells.

which of the following is true about the cells in the nervous system?
all of the above
cells in the brain and spinal cord have different, specialized structures and functions.
cells in the brain and spinal cord have identical, specialized structures and functions.
each individual cell in the brain and spinal cord is a unique type of cell.

1. which statement is true about organ systems in the human body?

all organ systems carry out the same functions in the human body.

Explanation:

To solve question 3, we analyze each option:

• Option "Cells in the brain and spinal cord have different, specialized structures and functions": In the nervous system, brain cells (e.g., neurons, glial cells) and spinal cord cells have specialized roles (e.g., processing vs. transmitting signals) and structures.
• Option "Cells in the brain and spinal cord have identical, specialized structures and functions": False, as brain and spinal cord cells differ in function (e.g., brain for complex processing, spinal cord for reflexes) and structure.
• Option "Each individual cell in the brain and spinal cord is a unique type of cell": False, there are distinct cell types (e.g., different neuron types, glial cell types) but not every single cell is unique.
• Option "All of the above": Incorrect because the other two options are false.

The correct statement is "Cells in the brain and spinal cord have different, specialized structures and functions."

For question 4 (partially visible), the option "All organ systems carry out the same functions in the human body" is false, as organ systems (e.g., respiratory for gas exchange, digestive for nutrient absorption) have distinct functions. (Note: Full options for Q4 are needed for complete analysis, but based on the visible option, it is incorrect.)

Answer:

1. Cells in the brain and spinal cord have different, specialized structures and functions.
2. (Assuming other options are correct, but based on visible option: The option "All organ systems carry out the same functions in the human body" is incorrect. If other options exist, the correct one would relate to organ systems having distinct, specialized functions.)