CHON is a mnemonic acronym for the four most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen.
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<span>The
answer is D. So as to take the shortest time to react to stimuli, most sensory neurons
are looped through the spinal cord to motor neurons. Following a reflex action,
the signal is later passed to the brain, from the spinal cord, for the signal
to be analyzed. A reflex arc is divided into
somatic and autonomic reflex arcs. The former is connected to outer muscles
while the later to inner organs. </span>
This could be due to a malfunction of her thymus.
The thymus is a soft triangular shaped organ that is situated in the mediastinum of the thoracic cavity. The thymus is the predominant donor of cells for the lymphatic system. The thymus performs an important role in the training and growth of T cells (thymus-derived cells) that are produced in the red bone marrow. The T cells defend the body by destroying infected or cancerous cells and harmful pathogens such as bacteria, viruses, and fungi. The thymus also helps in the proper growth of other organs within the immune system.
Answer:
The urinary system consists of the ureters, kidneys, bladder, and urethra, also known as the renal system or urinary tract. It performs several functions including:
1. Regulate blood volume and pressure: change the amount of water lost in urine, EPO (more bone marrow activates RBC) and Renin
2. Regulate concentrations of plasma ions: monitors potassium, sodium, and chloride ions lost through urine and calcium ion levels by calcitriol synthesis (osteoclast activity and prevents urinary loss)
3. Helps to regulate blood pH: monitor hydrogen ion loss and bicarbonate ions in urine
4. Conserve essential nutrients: preventing nutrient excretion when excreting agricultural wastes
5. Help to detoxify toxins in the liver
Answer:
The atoms of each element have a characteristic number of electrons arranged in electron shells. The number of valence electrons determines what types of bonds or ions the atoms may form, so the chemical reactivity of an atom arises from its electron distribution. The properties of compounds emerge from the arrangement of their constituent atoms and of the bonds between them.
Thus, a wide variety of molecules with very different chemical properties can be made from the same basic atoms. Each molecule has a distinctive size, shape, and charge distribution, which determine its highly specific ability to interact with other molecules.
Compounds in chemical wastes may contaminate the environment if their atoms are combined in new arrangements that harm living organisms.
Explanation: