Isotonic Solution
This solution is basically when the medium surrounding a cell has same water concentration as the cell, there is no net movement of water across the cell membrane. As a result the water moves equally in both sides and the cell remains the same size.
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Answer:
the sun provides all energy
Answer:
<em>The correct option is d) once the electrical impulse reaches a certain level of intensity (its threshold), it fires and moves all the way down the axon without losing any intensity.</em>
Explanation:
In the field of biology, the all-or-nothing law can be described as a principle which focuses on the strength with which a nerve or muscle fibre responds to a particular stimulus, this strength being independent of the strength of the stimulus. The functioning of the impulse is just like the trigger of a gun. The more the force of a stimulus, the more will be the intensity of the nerve impulse.
A) transports oxygen and carbon dioxide for the respiratory system
