To see gradual variations in shading, we rely on cells that respond best to ___ but to see abrupt changes in light versus dark, we rely on cells that respond best to ___.
a. low frequency stimuli; sine wave gratings
b. high frequency stimuli; low frequency stimuli
c. sine wave gratings; Mach bands
d. low frequency stimuli; high frequency stimuli
Question 2
During LTP, the first few pulses of glutamate:
a. Dislodge the magnesium ions from the NMDA receptor
b. Allow sodium and calcium ions to enter
c. Increase the likelihood the neuron will fire, and increase the number and sensitivity of AMPA receptors
d. All of the above
Mouse trachea and its red blood cells
Normal red blood cells.
Glucagon- and insulin-secreting cells in the islets of Langerhans
Hair cells
Muscle cells
Cytokinesis in animal cells (a) and plant cells (b)