If you could monitor the activity from the photoreceptors of rods and cones in the retina during a dream, would you expect these cells to be producing electrical signals? Why?
A) Yes, because the rods and cones are reproducing images that are then sent to the brain.
B) Yes, because our eyes move during sleep, and this stimulates the rods and cones.
C) No, because rods and cones only convert light energy into electrical signals.
D) No, because rods and cones never produce electrical signals.
C
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________ consist of proteins and RNAs that associate, providing both a physical support and enzyme activity for protein synthesis.
A) Nucleosomes B) Ribosomes C) Nuclei D) Histones
Stimulation of a sensory receptor causes a receptor potential. Similar to action potentials, receptor potentials do not vary in magnitude, and are ‘all or nothing.’
1.True 2.False
In order to provide more strength and resilience, the human vertebral column normally has how many curvatures?
A. one B. two C. three D. four
As a seed develops from an ovule, the ovule wall enlarges and develop into a:
a. fruit b. seed coat
c. megaspore d. microspore e. pollen grain