Organ Systems 1

Which order shows the flow of air when you breathe out?

• lungs --> bronchi --> trachea --> nasal cavity

• nasal cavity --> trachea --> bronchi --> lungs

• nasal cavity --> bronchi --> trachea --> lungs

• bronchi --> lungs --> trachea --> nasal cavity

Which can be found in the central nervous system?

• brain

• sensory neurons

• peripheral nerves

• motor neurons

Our sensory organs receive information or change in the environment outside or inside our body in the form of touch, temperature, pressure, etc. This sensation is also called ....

• stimulus

• receptor

• nerve signals

• neurons

The diagram below shows a reflex action where the hand pulls away when feeling pain from touching the fire. In this reflex action, the muscles in the arms are considered as the ...

• effectors

• receptors

• peripheral nervous system

• central nervous system

The diagram below shows a reflex action where the hand pulls away when feeling pain from touching the fire. Instead of receiving a response from the brain, the response is processed by the ....

• spinal cord

• muscles in the arm

• sensory neuron

• motor neuron

In a neuron, the structure labeled M sends signals to other adjacent neurons through a synapse. The structure labeled M is called ....

• axon terminal

• axon

• dendrite

• cell body

The image below shows how the diaphragm helps when we are breathing. How does the diaphragm help in terms of breathing?

• It rises up and makes the volume of the lungs smaller to expel air out of the lungs.

• It helps move the ribs as we breathe in and out.

• It lowers down whenever we want to breathe out.

• It rises up to expand the lungs causing the air from outside to enter the lungs.

Where does the exchange of oxygen and carbon dioxide happen SPECIFICALLY in the respiratory system?

• alveolus

• lungs

• capillaries

• diaphragm

Why do we need to keep breathing to stay alive?

• We breathe in oxygen for our cells to produce energy.

• We breathe in carbon dioxide to keep our heart pumping.

• Our lungs need to be full of air to stay alive.

• There are nutrients in the air that we need to stay alive.

Which is the correct direction that an electrical signal travel as it is transmitted from one neuron to another?

• dendrite > nucleus > axon > axon terminal > dendrite of another cell

• dendrite > axon > nucleus > axon terminal > dendrite of another cell

• axon > axon terminal > nucleus > dendrite > axon of another cell

• nucleus > dendrite > axon > axon terminal > nucleus of another cell