Senses Flashcards
Name all the senses and what body part detects it.
- Touch-skin
- Sight-eyes
- Smell-nose
- Taste-tongue
- Hearing-ears
What are the four sensations tongues can detect?
. Salty
. Sweet
. Sour
. Bitter
How do we taste?
After foods are dissolved by saliva, taste buds on the tongue sent the messages to the brain.
What are spells? How do we detect smells?
Smells are chemicals in the air that dissolve in the moist lining in our nose. It detects the smell with the olfactory nerve.
What is flavour and how do we detect flavour?
Smell and taste both work together to create taste, 80% of taste is smell.
Facts on TOUCH!
Our skin is our longest ORGAN, there are millions or nerve endings in our skin they can detect pain, pressure and temperature, there are some parts in our skin that are more sensitive than others.
What does the retina do?
The retina captures light rays
And converts them into electrical pulses.
What does the iris do?
The iris controls the light levels inside the eye.
What does the lens do?
The lens helps to REFRACT light to focus on the retina.
What does the pupil do?
The pupil controls the illumination in the eye and to improve the optical quality of the image on the retina.
What does the cornea do?
The cornea helps shield the eye from harmful matter and controls/focuses the entry of light into the eye.
That do the suspensory ligaments do?
The suspensory ligaments hold the lens in position and Change the focus on the lens.
What does the Vitreous humours do?
The vitreous humours is a transparent jelly-like mass used to help keep the retina in place.
What do the Ciliary muscles do?
The ciliary muscles adjust the shape of the lens in order to focus the eye.
What does the optic nerve do?
The optic nerve transmits information to the brain.
What is the blind spot?
The blind spot is where the optic nerve connects from the eye to the brain, you cannot see anything that is focused here.
How do we hear?
- sound travels at 340m per second
- sound is made out of vibrations the way it vibrates is determined by how high a note is and how loud it is
- these vibrations are picked up by our ear drums, from there various parts of the ear change sound energy into electrical impulses which is sent to the brain allowing us to hear.
How many sections are there in our ear? Name them.
There are 3 sections:
- the outer ear
- the middle ear
- the outer ear
The outer ear:
The outer ear , as well as the middle ear, is filled with air. The outer ears main job is to funnel sound into the ear.
Middle ear:
The middle ear begins with the ear drum, it is what first vibrates in response to sound.
What makes the group called ‘ossicles’?
The ‘hammer’, the ‘anvil’ and the ‘stirrup’.
The ‘stirrup’:
The ‘stirrup’ vibrates against the ‘oval window’ this causes vibrations to pass through the fluid filled tube called the ‘cochlea’.
The ‘cochlea’:
The ‘cochlea’ passes the vibrations it gets to the auditory nerves which pass the information on to the brain.
