The ability of living organisms to detect stimuli is called:
Sensitivity is the ability of living organisms to detect and respond to stimuli in their environment.
A cellular structure that can detect a specific stimulus is called a:
A receptor is a structure that detects specific stimuli and initiates a response.
________is any change in an organism's environment that can be sensed or detected called?
A stimulus is any change in the environment that can be detected by an organism.
Which of the following is NOT a sense organ?
The heart is not a sense organ; it is primarily responsible for pumping blood throughout the body.
What is the main function of the eye?
The main function of the eye is vision, allowing us to see and interpret our surroundings.
Which part of the eye bends incoming light?
The cornea is the part of the eye that bends incoming light, helping to focus it on the retina.
What is the coloured part of the eye called?
The iris is the colored part of the eye, which controls the size of the pupil.
Which part of the eye is the central opening that lets light in?
The pupil is the central opening of the eye that allows light to enter.
Which part of the eye focuses light onto the retina?
The lens focuses light onto the retina to form clear images.
What is the function of the retina?
The retina receives light and converts it into electrical signals that are sent to the brain.
What are the light-sensitive cells on the retina called?
Photoreceptors are the light-sensitive cells located on the retina.
Which cells on the retina are sensitive to light?
Rods are the cells on the retina that are highly sensitive to light and help in vision under low light conditions.
Which part of the eye sends visual signals to the brain?
The optic nerve carries visual information from the retina to the brain.
What type of signals does the optic nerve carry?
The optic nerve carries electrical signals generated by the photoreceptors in the retina to the brain.
Which part of the eye acts like a camera lens?
The lens of the eye focuses light onto the retina, similar to how a camera lens focuses light onto film or a sensor.
What happens when light hits the retina?
When light hits the retina, photoreceptors (rods and cones) convert the light into electrical signals that are sent to the brain.
What is the main function of the ear?
The main function of the ear is to detect and process sound, allowing us to hear.
Which part of the ear is visible from the outside?
The pinna is the visible part of the ear located outside the head.
What is the role of the ear canal?
The ear canal transfers sound waves from the outer ear to the middle ear.
What causes the eardrum to vibrate?
Sound waves entering the ear canal cause the eardrum to vibrate.
Which bones are found in the middle ear?
The middle ear contains three small bones called the malleus, incus, and stapes, which transmit sound vibrations.
What happens after the tiny bones in the middle ear vibrate?
After the tiny bones in the middle ear vibrate, they transmit these vibrations to the fluid inside the cochlea in the inner ear.
What creates electrical signals in the ear?
Vibrations of tiny hair cells in the cochlea create electrical signals that are sent to the brain.
What is the function of the cochlear nerve?
The cochlear nerve carries sound signals from the cochlea to the brain.
What helps the body maintain balance?
The semicircular canals in the inner ear help the body maintain balance by detecting head movements.
What is the main function of the nose?
The main function of the nose is to help us smell by detecting chemicals in the air.
What actually causes the sensation of smell?
The sensation of smell is caused by chemicals present in the air that bind to smell receptors in the nose.
Where are the smell receptors located in the nose?
Smell receptors are located on the roof of the nasal cavity.
Which part of the brain receives signals from the smell receptors?
The olfactory bulb in the brain receives signals from the smell receptors in the nose.
What is the main function of the tongue?
The main function of the tongue is to detect the taste of food.
How many basic tastes can the tongue detect?
The tongue can detect four basic tastes: sweet, sour, salty, and bitter.
Which of the following is not one of the basic tastes detected by the tongue?
Spicy is not one of the basic tastes detected by the tongue; it is actually a pain response.
What gives the tongue its rough surface?
Papillae give the tongue its rough surface and contain the taste buds.
Where are taste buds located?
Taste buds are located in between the papillae on the tongue.
What is unique about the taste receptors of a catfish?
Catfish have taste receptors spread all over their body, allowing them to taste their surroundings.
What is the main role of receptors in the skin?
Receptors in the skin detect various sensations such as touch, temperature, pain, and pressure.
Which layer of the skin contains sensory receptors?
The dermis layer of the skin contains sensory receptors.
What does the thermoreceptor in the skin detect?
Thermoreceptors in the skin detect heat or cold.
Which receptor is responsible for sensing touch?
Meissner's corpuscles are responsible for sensing light touch.
What kind of sensation does the nociceptor respond to?
Nociceptors respond to painful sensations.
Which receptor detects pressure on the skin?
Pacinian corpuscles detect pressure on the skin.
What is the correct order of skin layers from outermost to innermost?
The correct order of skin layers from outermost to innermost is: Epidermis, Dermis, Hypodermis.
How do signals from skin receptors reach the brain?
Signals from skin receptors reach the brain through sensory neurons.