10.1 and 10.4
________ is the ability to detect and respond to stimuli
Sensitivity
Name all parts of the eye
Cornea, Lens, iris, focusing muscle, pupil, jelly-like fluid, sclera, retina, blind spot, optic nerve
Name all the parts of the ear
Pinna, Ear canal, ear drums, Ear bones, Cochlea and Auditory nerve
What are the stimulus for skin
Touch, pressure, pain and temperature
What are the main parts of the brain
Cerebrum, Cerebellum, Medulla
Name all the sense organs and their stimuli
Sense organ: ear, nose, tongue, skin and eye
Stimuli: eye: light, ear: sound, nose: smell: of chemical substance, tongue: flavors of chemical substance, skin: touch, pressure, pain, and temperature
What do cone cells and rod cells do?
Cone cells are sensitive to bright light and can produce red, green, and blue colors to allow us to see color
Rod cells are sensitive to dim light and can't detect color
True of False, The faster an object vibrates, the higher the frequency of the sound produced
True
The receptors in the skin aren't evenly ______. Different body parts are not ______ sensitive to _____.
The receptors in the skin aren't evenly distributed. Different body parts are not equally sensitive to touch.
What is the definition of reaction time
The time between detecting a stimulus and making a response stimuli detected by sensory cells of sense organs
Name the table for sense organs
Stimulus(detected by), specialized sensory cells in sense organ(Send signals via nerves), Brain(produces),Sense
Why is there no image formed on the blind spot
It has no light-sensitive cells
How is sound produced?
Object vibrating in the air causes the surrounding air particles to vibrate and the vibrations can travel through the air
Our sense of balance relies on the ______, ________, _______ and the ______
Our sense of balance relies on the joints, eyes, muscles and inner ears
What is the role of our brain? In steps
1. Sense organs detect stimuli and send signals to the brain
2. Brain acts as a coordinator
-integrates and interprets the signals
-produces sense
-decides on actions
3. The brain sends signals to muscles
4. Muscles make response
Name all steps for detecting smell
1: Chemicals from food or other substances that spread into the air
2: Breathing in allows the chemicals to enter our nose via the nasal cavity and dissolve in the mucus
3: Stimulate smell receptors to signals via nerves
4: Sent to the brain as smell
How is an image formed in the eye
1. Light enters our eyes through the cornea
2. The cornea, Lens and Jelly-like fluid help focus the light onto the retina
3. A sharp and inverted image is formed on the retina. Light-sensitive cells produce signals
4. Optic Nerve sends signals to the brain. Brain interprets the signals as an upright image
Sound must travel through a _______. It can be a ___, _____, or _____. Sound is transmitted through the ______ of air particles.
Sound must travel through a medium. It can be a solid, liquid, or gas. Sound is transmitted through vibrations of air particles.
What are the three semicircular canals and what do they do?
Sensory hair cells surrounded by a gel-like stucture and a fluid.
When our head moves, it can stimulate the sensory hair cells using the fluid. They then send signals through nerves to the brain. Brain interprets these signals and positions the head and its movements
What are some long term and short term effects of alcohol (not in the book)
Long term
-Addiction
-damage brain and liver
Short term
-Affects judgement and memory
-raises reaction time and response to stimuli
-blurred vison and unclear speech
-Less body coordination
_________ in our nose detect ____ to produce ____
______ in our tongue detect ______ to produce _____
The flavour of food is ______ by both the senses of ______ and _______
Smell receptors in our nose detect chemicals to produce smell
Taste receptors in our tongue detect chemicals to produce taste
The flavour of food is detected by both the sense of smell and taste
name all the eye defects and state why they are caused?
Short sight is caused by the lens being too thick or the eyeball being too long
Long sight is caused by the lens being to thin or the eyeball being too short
Astigmatism is caused by the lens or cornea being unevenly curved
Cataract is caused by a cloudy lens or heredity
Color blindness is caused by the cone cells not working and heredity
How can we hear? In steps
1. The pinna collects sound from its surroundings
2. Sound travels along the ear canal to the middle ear
3. Eardrum vibrates
4. The three ear bones amplify the sound
5. The sensory hair cells in the Cochlea detect the hearing and produce signals to the brain
6. The auditory nerve sends signals to the brain
Free
Free
Effects of inhaling organic solvents and what happens when inhales (Steps)
Damage: Brain, Lungs, and Heart, can lead to perma damage or death
1. Chemicals enter our blood
2. Chemicals are transported throughout the body
3. lowers sense and judgement when reaching the brain