Responding to the Environment

Which of the following allows you to smell?

• cochlea cells

• olfactory cells

• optic nerves

• cones

if you rub a piece of sand that blows into your eye, you are likely to scratch your __________.

• cornea

• thymus

• iris

• retina

Three sensations that receptors in the skin detect are

• light, smell, and sound.

• touch, pain, and odors.

• temperature, pressure, and pain.

• pressure, sound, and touch.

Skin is a part of what body system?

• Urinary

• Integumentary

• Cardiovascular

• Skeletal

This involuntary, immediate response to your environment is done without your brain thinking about it.

• reflex

• feedback loop

• vibration

• central nervous system

a cycle of events in which information from one step controls or affects a previous step

• feedback mechanism

• integumentary system

• retina

• cochlea

These photoreceptors are sensitive to dim light and are important for night vision.

• rods

• cones

These photoreceptors are sensitive to bright light and help us see fine details and colors.

• rods

• cones

The pupil is an opening in our eye that is surrounded by the __________, a ring of muscle.

• pupil

• iris

• cornea

• lens

This oval-shaped piece of clear, curved material behind the iris focuses light onto the retina.

• lens

• cornea

• pupil

• optic nerve