Nervous System and Sense Organs

What is the nervous system in charge of?

• Taking information from the sense organs and deciding what to do with it.

• Digesting food and absorbing nutrients.

• Circulating blood throughout the body.

• Producing hormones and regulating metabolism.

Answer explanation

The nervous system processes information from the sense organs and coordinates responses, making it responsible for interpreting sensory input and deciding actions, unlike the other options which pertain to different bodily functions.

Sense organs include eyes, ears, skin, nose, and _______.

• mouth

• hand

• leg

• hair

Answer explanation

The sense organs are responsible for processing sensory information. The mouth is included as it plays a role in taste, making it a sense organ alongside the eyes, ears, skin, and nose.

What does the nervous system receive from the sense organs?

• Information

• Energy

• Nutrients

• Hormones

Answer explanation

The nervous system receives information from the sense organs, which helps it process and respond to stimuli. This is essential for perception and interaction with the environment.

Stimuli from the ______ organs change to electrical signals.

• sense

• digestive

• muscular

• skeletal

Answer explanation

Stimuli from the sense organs, such as eyes and ears, convert external information into electrical signals that the brain can interpret. This makes 'sense' the correct choice, as the other options do not perform this function.

The ______ carry these electrical signals to the brain and spinal cord.

• nerves

• muscles

• bones

• veins

Answer explanation

The correct answer is 'nerves' because they are responsible for carrying electrical signals to the brain and spinal cord, facilitating communication within the nervous system.

The ______ decides what the stimulus is and how to respond.

• brain

• heart

• lungs

• liver

Answer explanation

The brain is responsible for processing stimuli and determining appropriate responses, making it the correct choice. The heart, lungs, and liver do not perform this cognitive function.

What is each nerve cell called?

• neuron

• axon

• dendrite

• glial cell

Answer explanation

Each nerve cell is called a neuron. Neurons are the fundamental units of the nervous system, responsible for transmitting information throughout the body.

What do nerves carry throughout your body?

• messages

• blood

• oxygen

• nutrients

Answer explanation

Nerves carry messages throughout your body, transmitting signals between the brain and other parts. This is essential for communication within the nervous system, unlike blood, oxygen, or nutrients, which are transported by other systems.

In which direction do the messages travel in the nervous system?

• one-way

• two-way

• circular

• random

Answer explanation

In the nervous system, messages travel in a one-way direction. This means that signals are transmitted from one neuron to another without reversing direction, ensuring efficient communication.

The spinal cord is a bundle of ______ that connect the brain to the rest of the body.

• nerves

• muscles

• bones

• tissues

Answer explanation

The spinal cord is primarily composed of nerves, which transmit signals between the brain and the rest of the body. This makes 'nerves' the correct choice, as muscles, bones, and tissues do not serve this specific function.