TRUE OR FALSE: The brain has 5 different parts.
False - It has 3 parts: Cerebrum, Cerebellum, and Brain stem.
TRUE OR FALSE: The brain is protected by muscles and tissues.
False, the brain is protected by the skull.
How many muscles are there in our body?
Over 600!
What are the tiny hairs inside our nose called? What do they do?
cilia - they are connected to smell sensors.
What do motor neurons do?
They send messages from the brain to the local motor system.
What is the organ that controls our nervous system?
The brain.
What is the inner ear filled with?
Fluid
In what layer of the skin does the sense of touch originate? Hint: This is the BOTTOM-MOST layer.
Dermis. (NOT hypodermis)
What is the function of the rods and cones?
CONES help us see COLORS, and RODS help with SIDE/PERIPHERAL VISION and NIGHT VISION.
Fill in the blank: Taste helps us detect _________ of food, minerals and chemicals.
Flavor.
What is the skeleton made of?
bones and cartilage
What function do our eyes have?
They take in light and send image messages to our brains.
How can we hear a sound? What helps us hear?
SOUND WAVES enter the OUTER EAR, go through the EAR CANAL to the EARDRUM. We can hear the sound when the eardrum vibrates.
The brain stem is the continuation of the ________ _______ and it controls ____________ _________ such as our heartbeat.
The brain stem is a continuation of the SPINAL CORD and it controls INVOLUNTARY ACTIONS such as our heartbeat.
The vibrations in the cochlea make ________ which produce sound signals and get sent to the brain.
waves
What are the 5 basic tastes?
salty, sweet, bitter, sour and umami.
Some people can't see colors correctly and can't tell the difference between red and green. What is this condition called?
colour blindness.
How do humans receive taste?
Through taste buds.
What bones in the middle ear, are the SMALLEST bones in the human body? What do they do?
ossicles - magnify the motion of the eardrum.
PERIPHERAL NERVOUS SYSTEM: What kind of neurons help collect information from our eyes, ears, nose and mouth?
Sensory neurons.
How do nerve endings send information about temperature and texture to our brain?
They send ELECTRICAL IMPULSES through the spinal cord.
What are the 4 types of touch sensations?
cold, heat, contact and pain.
TRUE or FALSE: The retina is at the front of our eyeballs and the LENS is at the back.
False, the lens is at the front and the retina is at the back of our eyeballs. The LENS helps focus images onto the RETINA.
What parts of the body have MORE nerve endings than the rest of the body?
Fingertips, lips and face.
What are the 2 types of light sensitive cells that make up the retina tissue?
Rods and Cones
TRUE or FALSE: The images sent from our eyes to our brains are perfectly OK, and the brain doesn't make any changes to them.
FALSE - The images are upside down, but the brain turns them the correct way so we can see
What do the semicircular canals in the inner ear do?
They keep the body in balance
TRUE OR FALSE: The sense of touch ONLY happens in the mouth and brain.
False, The sense of touch is spread throughout the whole body.
What happens after all the sensory information is collected from the sense organs?
The brain processes the information and sends signals to other parts of the body.
What substance in the mouth helps break down food?
Saliva
What 3 things does the CEREBELLUM control for us?
It controls movement, coordination and balance.
TRUE OR FALSE: Hair cells at the base of the cochlea are moved by LOW PITCHED sounds, and hair cells at the apex respond to HIGH PITCHED sounds.
False, hair cells at the base of the cochlea respond to HIGH PITCHED sounds, and hair cells at the apex are moved by LOW PITCHED sounds.
What is the biggest part of our brain and what does it do?
The CEREBRUM is the biggest part of the brain. The cerebrum processes info from our senses and helps us think.
What are the 3 parts of the ear?
Outer ear, middle ear, and inner ear.
How many smells can we smell?
We can smell over 10.000 smells!
What is the membrane of the inner ear lined with? (These are the RECEPTORS of the hearing system)
thousands of hair cells
TRUE OR FALSE: The spinal cord is protected by the vertebrae and it controls reflex actions.
True.
What organ in the INNER EAR is shaped like a SNAIL SHELL and translates sound wave energy into nerve signals (brian language)?
Cochlea
What organ in our body do we use to smell things?
Nose