Control and Information Processing in Body Systems

How do living things control body functions?

• Through the nervous system

• By using the brain only

• By responding to external stimuli

• By storing information as memories

Which of the following is a function of neurons?

• They help different parts of your body communicate with each other.

• They insulate the skin.

• They only respond to cold temperatures.

• They store memories.

How does the brain process information?

• It receives information and processes it.

• It sends signals to the environment.

• It only stores information as memories.

• It does not interact with the nervous system.

Receptors are special structures that ________.

• cause movement

• detect stimuli

• regulate heartbeats

• control muscles

The sensory system is part of your nervous system that ________.

• controls muscles

• senses the environment

• regulates heartbeats

• transmits impulses.

What does 'impulse' mean in scientific vocabulary?

• A large amount of energy

• A small amount of energy that moves from one area to another

• A type of receptor

• A sensory neuron.

Chemoreceptors on your tongue are called ______.

• Taste buds

• Odor receptors

• Nerve endings

• Skin cells

Which part of the eye focuses light onto the retina?

• Cornea

• Lens

• Pupil

• Iris

Rods and cones are types of ______ in the retina.

• Photoreceptors

• Cells

• Nerves

• Muscles

What is the function of the retina?

• To change the size of the pupil

• To detect colors and shapes

• To protect the eye

• To focus light.