homework #3 is due 4/11. bonus #3 is due f 4/27
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Homework #3 is due 4/11. Bonus #3 is due F 4/27. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. CB 48.3. Neurons: cells specialized for transmitting signals. CB 48.5. Parts of a neuron. Axon. Signals. - PowerPoint PPT PresentationTRANSCRIPT
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Homework #3 is due 4/11.Bonus #3 is due F 4/27.
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CB 48.3
Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response.
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CB 48.5
Neurons: cells specialized fortransmitting signals
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Axon
Parts of a neuron
Signals
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CB 48.7
In the brain neurons are shorter and highly interconnected
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electrical electricalat synapse chemical
At the synapse the electrical signal is converted to a chemical signal
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CB 48.16
Neurons are commonly connected to many other neurons, and the effect of the different incoming signals determines what the neuron will do.
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Incoming signals move through neurons. Only signals above the threshold are transmitted along the neuron.
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CB 48.19
The brain and the central nervous system integrate the various incoming signals
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Nervous System Signaling
Stimulus
Transduction Transmission
Response
Integration
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Smells are detected by receptor neurons in our nose. Each receptor is sensitive to a different chemical
CB 49.15
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Light is detected in the eye by receptors on the retina
CB 49.18
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Some vision problems arise from misshapen eyeballs too long
too short
CB 49.19
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CB 49.23
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Light receptor neurons of the eye:Rods detect black and whiteCones detect colors…one type of cone for each color - red, blue, and green
CB 49.22
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Inhibitoryneuro-transmitter
No light
Membrane depolarized
No Signal
CB 49.23
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Polar Membrane
light
Noinhibitoryneuro-transmitter
Signal sent
CB 49.23
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The optic nerves for each eye enter opposite sides of the brain
CB 49.24
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CB 48.19
The brain and the central nervous system integrate the various incoming signals
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CB 48.27
Different regions of the cerebral cortex integrate different inputs/outputs
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CB 48.29
Visualizing the specialization of brain regions
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CB 48.28
Some body parts have more sensory input/motor control
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CB 48.27
What effects how the brain is formed?
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CB 48.27
Season of Birth Contributes to Variation in University Examination Outcomes (2006)
American Journal Of Human Biology 18: 714–717
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Season of Birth Contributes to Variation in University Examination Outcomes. M Fieder, H Prossinger, K Iber, K Schaefer, B Wallner, and S Huber (2006) American Journal Of Human Biology 18: 714–717
Exam score data for 1995-2001
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Season of Birth Contributes to Variation in University Examination Outcomes. M Fieder, H Prossinger, K Iber, K Schaefer, B Wallner, and S Huber (2006) American Journal Of Human Biology 18: 714–717
Autumn born females have lowest average scores
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Season of Birth Contributes to Variation in University Examination Outcomes. M Fieder, H Prossinger, K Iber, K Schaefer, B Wallner, and S Huber (2006) American Journal Of Human Biology 18: 714–717
Autumn and Spring born males have lowest average scores
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Season of Birth Contributes to Variation in University Examination Outcomes. M Fieder, H Prossinger, K Iber, K Schaefer, B Wallner, and S Huber (2006) American Journal Of Human Biology 18: 714–717
Variance of scores in males is much higher
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Fig 1
Average female exam scores
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One year of female exam scores:highest scores for students born in May
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Season of Birth Contributes to Variation in University Examination Outcomes. M Fieder, H Prossinger, K Iber, K Schaefer, B Wallner, and S Huber (2006) American Journal Of Human Biology 18: 714–717
Pattern of birth season effects different in males and females
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CB 48.27
What effects how the brain is formed?
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Homework #3 is due 4/11.Bonus #3 is due F 4/27.