Answer:
Any two other subcellular structures that can be found in an animal cell are:
nucleus.
mitochondria
Oxygen or an oxidizing agent to receive electrons must be present for oxidation to occur in chemical reactions
after we breath in oxygen it is transferred to red blood cells. So it is important for cellular respiration.
Answer:
Receptors are highly specific and only have high affinity for those ligands for whom they are specific.
Explanation:
Receptors are proteins that receive a stimulus or bind a ligand and mediate effects via receptor effector system.
Receptors are macromolecules that are highly specific.
The affinity between the ligand and the receptors is determind by the disassociation constant Kd.
The receptors produce maximun effect when an appropriate specific stimulus is present.
Different recptors types are present for different ligands.
For example, muscrinic receptors are specific for acetycholine and adrenergic receptors are specific for adrenaline/nor adrenaline.
It is important to know the specificity so that the body remains in a state of balance.
Carbohydrates are food for plants. Plants make their own food (carbohydrates) through photosynthesis which occurs in the CHLOROPLASTS of all green plants and leaves.
