Im struggling in the class
. when i think of my brain and spinal cord, i am thinking of my
central nervous system
peripheral nervous system
autonomic nervous system
somatic nervous system
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question 121 pts
12. julie is walking down the street when a large dog runs out of the bushes, barking at her. julie finds herself frozen, unable to run, though she is petrified. which nervous system is causing her to freeze?
sympathetic
parasympathetic
central
frontal
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question 131 pts
paula has a hard time reading the tiny print in her book. she squeezes her eyes into a squint, which . paula has control of squinting, so what nervous system is involved?
somatic
autonomic
sympathetic
parasympathetic
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question 141 pts
my heart is racing, my hands are sweaty, and i am shaking. which nervous system do i need to engage?
parasympathetic
sympathetic
central
autonomic
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question 151 pts
how is it when i’m watching my favorite show the information gets through my eyes and into my brain? do i have a tv in there?
no, it's through transduction
yes - the tv signal is beamed straight into your brain
no, your eyes use a chemical process to change the information
yes - anything outside has to first exist in our bodies
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question 161 pts
why can’t i see reddish-green? why do i see afterimages? which theory of color vision best answers my questions?
opponent process theory
trichromatic theory
vision theory of color
rainbow theory
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question 171 pts
after the pinna collects sounds that travel through the auditory canal which part transduces sound waves into neural impulses that go to our brains?
cochlea
auditory canal
ear drum
auditory nerve
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question 181 pts
how are taste and smell different from touch, sight, and hearing? they are
chemical senses
neural senses only
not transduced
not considered senses
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question 191 pts
19. how can an understanding of our perceptions of sensations be used in a practical way
sensory processes can be used to influence our perception
sensations do not persuade us in any way
there is nothing practical about understanding sensations
so we know why emotions are important to our human experience
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question 201 pts
we are bombarded with hundreds of sensations every day, but we dismiss far more than we remember? why is that?
we only remember the sensations we perceive to be important somehow
the cell body only allows one sensation at a time through the brain
neurons are not interested in sensations and ignore them
our sensations must be changed into neural impulses through the process of perception

The Central Nervous System is composed of the brain and the spinal cord. They are responsible for processing and interpreting incoming and outgoing nerve signals. The other division of the Nervous System is the Peripheral Nervous System which is composed of the spinal nerves branching off the spinal cord in the body.

The Sympathetic Nervous System is a branch of the Autonomic Nervous System that is responsible for the fight-or-flight response of the body. It is activated during episodes of extreme stress, a threat to life, or an unfavorable event.  

The Somatic Nervous System is a branch of the Central Nervous System that supplies nerves to the skeletal system. Squinting is a somatic type of response which involves the extraocular muscles of the eyes. This helps in focusing the light entering the eye, making the image clearer as processed by the brain.  

The Parasympathetic Nervous System is a part of the Autonomic Nervous System that is responsible for the rest-and-digest response of the body. This means its effects are related to relaxing and saving energy. It slows down the heartbeat, relaxes muscles to lessen shaking, and lessens sweat production.

While watching TV, images are transmitted to the eyes as light and is received by the photoreceptors (rods and cones) in the retina. A series of chemical reactions transform the light to an electrical impulse that is carried to the visual center at the occipital lobe of the brain. It is processed and interpreted as an image displayed like in the TV.

The Opponent Process theory states that a color always has a corresponding pair, e.g. yellow-blue, black-white, and green-red. When one of the colors in the pair is excited e.g. red, the green is then suppressed, and vice versa. That’s why we cannot see reddish-green colors. The afterimages are remnants of excitation of the encountered color stimulus. Example of this phenomenon would be staring at a bright light and immediately closing your eyes.

The Auditory Nerve, also known as Cranial Nerve VIII, Cochlear nerve or Acoustic nerve, transmits sound from the ears to the midbrain to be processed by the primary auditory complex at the temporal lobes of the brain.

The Taste and Smell senses are able to transmit signals to the brain by binding chemical molecules with their corresponding receptors. For taste, this occurs when molecules come in contact with water or fluids in the different kinds of tongue papillae receptors. They can recognize salty, sweet, sour, bitter, and umami tastes. For the smell, the olfactory receptors can gather volatile air molecules of different kinds of odors like woody, pungent, fragrant, chemical, or minty smells.

When the sensory processes are interpreted in our brain, it may help us interpret if our current situation is safe or dangerous, satiated or hungry, loud or quiet, etc.

This process is called selective filtering or selective attention. This process happens in the thalamus and cerebral cortex, wherein these signals are then interpreted if it needs attention or not. An example would be watching a movie. If you wanted to focus on the movie, the cerebral cortex would block out other unrelated signals like people giggling behind you, smell of popcorn, etc. This is done by directing GABA to the reticular nucleus (part of thalamus), suppressing these unnecessary signals, and selectively focusing your attention to the movie.

no way! i don't want to spend my night being sick!

she forgets to repeat her message as often as necessary