2.2 more Flashcards
(20 cards)
What is the function of sense organs?
To detect stimuli in your environment such as light, sound, touch, taste, and smell.
Sense organs include eyes, ears, skin, tongue, and nose.
What are receptors?
Special cells that receive and convert signals in the body.
Receptors are named according to the type of stimuli they respond to.
What type of receptor is found in the eye?
Photoreceptor
Rods and cones in the retina are examples of photoreceptors.
Which type of receptor is sensitive to sound?
Mechanoreceptor
Hairs in the cochlea are mechanoreceptors that respond to sound.
What type of receptors detect temperature changes?
Thermoreceptors
They are located in the skin, body core, and hypothalamus.
Fill in the blank: Taste receptors are known as _______.
Chemoreceptors
Where are pain receptors located?
Throughout the body except in the brain.
Pain receptors send nerve signals to the brain and spinal cord in response to damaged cells.
What do mechanoreceptors respond to?
Touch, pressure, sound, motion, and muscle movement.
They are located in the skin, skeletal muscles, and inner ear.
What is the role of the olfactory nerve?
To send signals to the brain from the chemoreceptors in the nose.
What is the function of the iris in the eye?
To control the amount of light that enters the eye by adjusting the size of the pupil.
What are the two types of photoreceptors in the retina?
Rods and cones.
Rods detect light intensity, while cones respond to color.
What is the function of the cornea?
To bend light towards the pupil.
The cornea is the clear outer covering of the eye.
True or False: The retina is responsible for producing an image.
False
The retina receives light and sends signals to the brain, which interprets the image.
Which receptors are responsible for detecting sharp objects?
Pain receptors and mechanoreceptors.
Fill in the blank: _______ enable the detection of chemicals in the nose.
Chemoreceptors
What is the average normal body temperature?
37.5 °C
Hot thermoreceptors detect temperatures above this, while cold thermoreceptors detect below 35.8 °C.
What type of receptor is sensitive to chemical substances like sweet and salty?
Chemoreceptors
These are found in taste buds on the tongue.
What happens to the pupil in bright light?
It becomes smaller to let less light into the eye.
What is the role of the lens in the eye?
To bend or focus light onto the retina.
What is the significance of detecting pain?
It indicates danger, injury, or disease.
