revision concept 1 grade 6

When feeling nervous or exposed to a dangerous situation, ..................

• Each system works separately

• The systems work together in an integrated system

• The systems do not interact with each other

The process of muscle contraction leads to………………… its length.

• decrease

• increase

• no change

The …………… sends instructions to muscles

• Heart

• brain

• arm

Performing simple movements such as pick up a glass of water over the table. What systems in the human body work together to perform this task?

• nervous and circulatory

• nervous and musculoskeletal

• nervous, circulatory and musculoskeletal.

The group of similar cells work together to form ……… .

• organ

• tissue

• system

........................ contains the pigment chlorophyll, which helps it absorb the energy of sunlight to carry out the photosynthesis process.

• Nucleus

• Chloroplast

• Mitochondria

......................... is considered the main control center in the cell.

• Nucleus

• Chloroplast

• Golgi apparatus

A type of cell that contains a cell wall and Chloroplast is…………….

• Animal cell

• Plant cell

• Bacteria

The plant cell is distinguished from the animal cell in that it contains .................... which gives it a definite shape.

• Cell membrane

• Cell wall

• vacuole

The smallest tiny structures that build up all living organism's bodies are …..................

• systems.

• cells

• organs

• Bricks