Answer:
open; depolarized
Explanation:
The photoreceptors, i.e., rods and cones, are specialized neurons located in the retina. These cells convert sunlight into electrochemical signals which are interpreted by the central nervous system. The cGMP-gated channels that are expressed in photoreceptor plasma membranes have a major role in this process by regulating the flow of sodium (Na+) and calcium (Ca2+) ions in the outer side of the membrane via changes to cyclic guanosine monophosphate (cGMP) levels which are induced by light. In the dark, high cGMP levels maintain channels in an open state, thereby allowing the passage of Na+ and Ca2+ ions to flow into the outer segment of photoreceptors in order to maintain them in a depolarized state.
Warm blooded animals are much stronger and like aligators , reptiles and different warm blooded animals
Answer:
Phytoplankton and algae form the bases of aquatic food webs. They are eaten by primary consumers like zooplankton, small fish, and crustaceans. Primary consumers are in turn eaten by fish, small sharks, corals, and baleen whales.
Explanation:
Speed of sound in water = 1500 m/s
frequency = 20Hz
wavelength = s/f = 1500/20 = 75m
Answer:
The earth has different layers because as it formed, the lighter parts (like continental crust) floated to the surface, and the really heavy parts (like iron and nickel in the core) sank to the middle. It is just like when you mix oil and water: the oil will float to the surface because it is lighter (or less dense) than the water.
