EA-SMT2 - Body Systems

What is the basic unit of life in the human body?

• Organ

• Tissue

• Cell

• Body system

Answer explanation

The basic unit of life in the human body is the cell. Cells are the smallest structural and functional units, making up tissues and organs, while organs form body systems.

Tags

NGSS.MS-LS1-1

Draw ONE organ system of the body, labeling the organs in that system.

Tags

NGSS.MS-LS1-3

Reorder the following, to show the organization of living organisms from SIMPLER to MORE COMPLEX:

• Organ Systems

• Organism

• Tissues

• Cells

• Organs

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-1

Red blood cells move along veins and arteries. What do they carry throughout the body (select more than one)?

• Oxygen

• Urea

• Carbon dioxide

• Alveoli

Answer explanation

Red blood cells primarily carry oxygen from the lungs to the body tissues. They also transport carbon dioxide, a waste product, from the tissues back to the lungs for exhalation. Urea and alveoli are not carried by red blood cells.

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-2

Which body system is responsible for transporting blood throughout the body?

• Respiratory system

• Digestive system

• Circulatory system

• Nervous system

Answer explanation

The circulatory system is responsible for transporting blood throughout the body, delivering oxygen and nutrients to cells while removing waste products. The other systems listed do not perform this function.

Tags

NGSS.MS-LS1-3

Which of the following body systems work together to help you move your arm?

• Nervous and muscular systems

• Digestive and respiratory systems

• Circulatory and immune systems

• Skeletal and integumentary systems

Answer explanation

The nervous system sends signals to the muscles, which contract to move the arm. Thus, the nervous and muscular systems work together for arm movement, making this the correct choice.

Tags

NGSS.MS-LS1-3

What happens when the sensory receptors in your skin detect heat?

• They send a message to the brain to initiate a response.

• They increase blood flow to the area.

• They produce sweat to cool down.

• They contract to protect the skin.

Answer explanation

When sensory receptors in the skin detect heat, they send a message to the brain to initiate a response. This is the first step in the body's reaction to heat, allowing for appropriate actions like sweating or moving away from the heat source.

Tags

NGSS.MS-LS1-8

Label the organs in the nervous system.

a

b

c

brain

nerves

spinal cord

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-8

Predict how a malfunction in the sensory receptors (ends of nerves that SENSE touch) of the skin could affect the body's response to injury. Put the steps in order.

• The brain doesn't get the message that there is danger at the fingertip.

• The sensory receptor doesn't feel the heat from a burner.

• The sensory nerve doesn't send the message to the brain.

• The brain doesn't send a message to the nerves to make the muscles pick the finger up off the hot burner.

• The finger gets a bad burn.

Tags

NGSS.MS-LS1-8

Discuss how the interaction between the circulatory and respiratory systems is crucial for maintaining oxygen levels in the body.

Answer explanation

The circulatory system transports oxygen from the lungs to body tissues, while the respiratory system facilitates gas exchange. This interaction ensures that oxygen levels remain adequate for cellular functions, vital for overall health.

Tags

NGSS.MS-LS1-3