To rest ourselves and prepare our mental and physical structure for the nezt day .
Microtubules play a role in the migration of chromosomes to opposite ends of a dividing cell during anaphase.
The stimulus and response when a human increases his/her physical activity
<h3>What is stimulus?</h3>
- A stimulus is a detectable change in the physical or chemical structure of an organism's internal or external environment.
- The ability of an organism or organ to detect external stimuli, so that an appropriate reaction or response can be made, is called sensitivity
When a human increases physical activity, the amount of fuel burned in its cells also increases, which in turn increases the concentration of dissolved CO2 in the blood. The CO2 reacts with water in the blood to make a weak acid, which lowers the pH of the blood.
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The plasma <span>membrane lacks a nuclear membrane and membrane-bound organelles</span>
