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Changes in blood water levels are detected by the hypothalamus through the negative feedback mechanism in homeostasis (2 marks). The pituitary gland releases anti-diuretic hormone into the bloodstream as ...

Red blood cells transport oxygen around the body via the circulatory system and are the most common cell in the blood. They carry a special protein called hemoglobin which binds to oxygen, allowing it to ...

Eukaryotic cells contain mitochondrion, to produce energy for the cellA nuclear membrane to contain the DNA strands which control the cellCytoskeleton for the movement of molecules and to aid with stabili...

Deoxygenated blood flows from the vena cava into the right atrium, through the tricuspid valve into the right ventricle. When the ventricles contract blood is forced through the pulmonary valve into the p...

Therapeutic cloning produces stem cells which are genetically identical to the parent cell. Nucleus is removed and discarded from the donor egg cell = enucleated egg. Nucleus is removed f...