Senses and the Nervous System

Nerve cells are also known as
1. Stimuli
2. Neurons
3. Muscles
4. Sense organs
Motor nerves carry messages to the
1. Brain
2. Retina
3. Muscles
4. Bones
Which of the following focuses light on the retina?
1. Iris
2. Retina
3. Lens
4. Cornea
What controls the size of the pupil?
1. The cornea
2. The retina
3. The ciliary muscle
4. The iris
Which part of the eye contains light-sensitive cells?
1. Iris
2. Retina
3. Cornea
4. Lens
In a reflex action, which of the following parts of the nervous system is not involved?
1. The spinal cord
2. Motor nerves
3. Sensory nerves
4. The brain
What controls the shape of the lens?
1. Ciliary muscle
2. Iris
3. Retina
4. Cornea
Anything in our surroundings which causes us to take an action is called a
1. Reaction
2. Response
3. Stimulus
4. Reflex
The central nervous system consists of
1. The 5 sense organs
2. Spinal cord
3. Brain and spinal cord
4. The brain, the spinal cord, and the 5 sense organs
Which of the following is responsible for carrying the visual image to the brain?
1. Retina
2. Optic Nerve
3. Pupil
4. Lens