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WorksheetsSenior Brain Bee Chapter 2 Senses and Perception
Total questions: 44
Worksheet time: 23mins
What does the cornea and lens do in the visual system?
adjust the focus
see the image
use photoreceptors
gather the light
What does the retina do in the visual system?
adjust the focus
Gather information by absorbing
light and and sends electric signal for
initial processing and integration
absorb all the brain signals
integrate the sensory information
What does the optic nerve do in the visual system?
use photoreceptors
gather the light
adjust the focus
collect all the signals
What does the brain do in the visual system?
Gather information by absorbing
light and and sends electric signal for
initial processing and integration
gather the light
process the final image
adjust the focus
What is binocular vision?
The ability to maintain visual focus on an object with both eyes, creating a single visual image
two images
two sets of two eyes
the ability to see cross-eyed
Does the eye form an inverted image?
yes
no
What happens in binocular vision after the eyes both see a separate image?
the brain adjusts the focus
the brain combines the images into one image
the retina gathers all the light
the pupil changes its size
What happens when the eyes are not aligned properly?
the eyes go blind
the brain forms an inverted image
the brain forms a double image
the brain cannot see correctly
What are the three types of photoreceptors?
green
blue
white
yellow
red
What is the outer layer of the retina made up of?
images
vision cells
neurons
photoreceptors
What is the middle layer of the retina made up of?
photoreceptors
ganglionic cells
interneurons
eye cells
What is the inner layer of the retina made up of?
multiple types of ganglionic cells
interneurons
photoreceptors
macula
What does the fovea contain?
blue cones
blue and red cones
only green cones
contains only red and green cones
What is the macula?
interneurons
Area around the fovea important for reading and driving
contains only blue cones
contains red and green cones
What is Macular Degeneration?
death of photoreceptors in Macula
(Leading cause of blindness in older population)
a type of brain disease
a brain tumor
the same as sleep walking
Where do objects visualized by the left form an image?
in the eye
left side of brain
in the middle of the brain
on the right side of the brain
What is the lateral geniculate nucleus?
Macular Degeneration- death of photoreceptors in Macula
(Leading cause of blindness in older population)
layer of photoreceptors
intermediate station between the retina and the visual cortex
a part of the hypothalamus
What does the middle layer of the visual cortex do?
activate the orbital cortex
activate photoreceptors
prefer stimuli in shape of bars
it receives signals from the lateral geniculate nucleus
What do the outer and inner layers of the visual cortex do?
prefer stimuli in the shape of bars and edges at particular orientation
receive signals from the projection pathway
transmit signals to the brain
What does the external ear do?
Pina and external auditory canal collects the
sound wave and funnel into tympanic
membrane to vibrate
receive the vibrations
create nerve impulses
react to the sound
What does the middle ear do?
it creates nerve impulses
it interprets the vibrations
Three bones Malleus(hammer), Incus(anvil)
and Stapes(stirrup) pass on the vibration to
oval window.
What does the inner ear do?
passes on vibration
Cochlea (fluid filled) tuned along its
length to different frequencies
interprets the sound
What do the hair cells in the cochlea do?
they activate glands
they communicate with the brain
detect the vibrations passed on by the bones
they convert the mechanical vibrations into electrical signals and excite 30000 fibers in the auditory nerve
Each hair cell rides on a different part of the basilar membrane and responds to a ---- -----
unique sound
different amplitude
different frequency
different person
Which place in the brain analyzes auditory information?
the occipital lobe
the auditory cortex
the orbital cortex
the frontal lobe
Each neuron in auditory cortex responds to a
note
distinct vibration
sound
different sound
What does the left side of the brain do?
it helps us do math
it perceives and produces speech
it turns aging genes on
it prunes away excessive neurons and synapses
A person with damage (Stroke) to the left side
can hear but
has difficulty understanding language
cannot talk by them self
cannot hear the language
cannot see
What happens in taste?
nose detects odorant molecules
the nose detects chemicals
Taste buds on the tongue identify sweet, salty, bitter etc
the ears hear sound
What does the nose do?
Taste buds on the tongue identify sweet, salty, bitter etc
detects airborne odorant molecules
detects vibrations
detects electricity
Combination of the sense of taste and smell help identify the chemical world
True
False
Why does food taste bad when you have a cold?
because the tongue is sick
because your sense of smell is impaired
the nose cannot communicate with brain
the tongue is clogged
What are taste buds embedded in protrusion called?
papillae on tongue
skin cells
cilia
hair cells
How many taste buds does each person have
2
500
20000
5000-10000
How many sensory cells does each taste bud have
12
12000
31
50-100
What is the correct order of the taste pathway
tongue-brain
taste buds-sensory cells-brain
sensory cells-end of nerve fibers-cranial nerve-brain stem(medulla)-thalamus-orbital cortex
tongue-brain-orbital cortex
What is the correct Olfactory pathway?
odorants stimulate hair like cilia on sensory neurons-axons enter olfactory bulbs-each receptor interacts with multiple odorants-neural activity creates a spatial map-primary olfactory cortex-orbital cortex
tongue-hair cells-nose-hair cells-orbital cortex
tongue-nose-brain
nose-brain
What does touch help us determine?
only color
only shape
characteristics of objects
vibrations of objects
Different parts of the body vary in sensitivity to tactile stimuli
True (fingertips more sensitive than soles of feet)
False
What are the sensory fibers that respond to pain types of Nociceptors?
geothermal
Mechanical
Chemical-wasabi, chillies
Thermal
hot
What are C-fibers?
a type of pain receptor
one class of nerve
fiber found in the nerves of the somatic
sensory system
a type of hormone
a type of neuron
Are C-fibers myelinated or non-myelinated?
Myelinated
non-myelinated
What pain do C-fibers produce?
slower, dull and diffuse like chronic pain due to nerve injury
fast and sharp pain
no pain
What pain do myelinated fibers produce?
no pain
fast and sharp pain like pinprick
slower, dull and diffuse like chronic pain due to nerve injury
