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general mechanism of a light touch
fewer action potentials compared to a stronger touch
general mechanism for differences in color
different light sensitive cells in retina are activated by different wave lengths of light
general mechanism for different pitch
different hair cells activated by different frequencies of sound waves
which mechanism is most different between light touch, difference in pitch, and difference in color
light touch
A farmer plows a bare field to turn over the soil so that deeper soil is exposed to sunlight. Three days later, the field is full of thousands of seedlings. what is the hormone and mechanism involved
After being exposed to sunlight, Auxin was produced promoting growth and elongation
Store-bought grapes are much larger than wild-type varieties.
Gibberellins promote cell division and elongation and are probably used by larger corps to enhance the size
where are steroid hormones recieved
receptor cells in cytosol
how are steroid hormones amplified
transcription and translation
how are non-steroid hormones amplified
second messengers
Actin filament
Myosin heads bind to actin to form cross-bridge sliding actin filament towards center of sacromere
Myosin filament
bind to actin filaments and using ATP to pull the actin filaments causing muscle contraction.
Z-line
anchors the actin filaments and defines the boundaries of the sarcomere
During contraction, the Z-lines move closer together as the actin filament slide, which shortens the sarcomere and leads to muscle
where are hair cells in mammals vs invertebrae
mammals - capula
invertebrae - statocyte
signal transduction
conversion of extracellular signal to intercellular
vestibular perception
maintains balance by detecting linear and angular acceleration and deceleration
