Answer:
The movement of molecules across a membrane without the input of energy is known as passive transport. When energy (ATP) is needed, the movement is known as active transport. Active transport moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration.
Explanation:
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Your muscles become stretched.<span />
Explanation:
Your heart muscle cells –
Ventricles need more, denser muscular tissue because they pump blood to either the whole body(aorta) or to lungs(pulmonary artery). Atria on the other hand pump blood straight to the ventricles so they do not need as much force and power to pump the blood.
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The top layer carry out photosynthesis
