Answer:
<u>Skin:</u> The skin acts as a barrier against external agents that could affect such as microorganisms, changes in temperature, etc.
<u>Excretes waste:</u> The excretion process, is done mainly by lungs (release of carbon dioxide), kidneys (elimination of excess compounds such as nitrogen) and the skin (sweat regulates temperature but also regulates the concentration of salts within the body)
<u>Nails:</u> It protects the soft tissues surrounding the distal phalanx, but it also exerts pressure over on the digits which allows more precission in the movements.
<u>Kidneys:</u> Eliminate waste from the blood and regulate body fluids, by generating urine.
<u>Bladder:</u> In charge of storing the urine produced by the kidneys, for the urination process to be controlled and not so frecuent.
Answer:
the sun and earth are in different places but im not 100% sure bout it
Answer:
The diagram can be improved by:
Lungs
↓
oxygen
↓
Red blood cells (carrying oxygen)
↓
Organs (like stomach and liver etc) from where carbon
is taken and oxygen is supplied
↓
RBC's carrying Carbon dioxide to the lungs
The component which is missing in the diagram are the organs where exchange of gases occurs. The red blood cells carry oxygenated blood from the lungs to all parts of the body and carries the wast carbon dioxide gas from them back to the lungs. The carbon dioxide is then exhaled by the lungs.
5.09 x 10 to the 6th power
Answer:
Hormones act as first messenger but not as second messengers.
Explanation:
Second messenger act as signaling molecule which are secreted in response to various biological signals generated by first messenger such as hormones,neurotransmitters etc.Second messengers include various bioactive molecules such as cyclic AMP(cAMP),cyclic GMP(cGMP),inositol triphosphate(IP3),diacylglycerol(DAG),calcium ions(Ca2+) etc.
Hormones are extracellular signaling molecules whereas second messengers are intracellular signaling molecules.
