Answer:
The intracellular molecule produced by the receptor ligand complex is called Second messenger.
Explanation:
Receptors are membrane bound proteins which bind to the ligands which are also called first messengers and cause cellular changes. These intracellular changes are mediated by second messengers such as proliferation, differentiation, migration, apoptosis, transcription, contractions etc. They are specific for specific first messengers such as homones and growth factors. They relay the signals between the ligands to their target molecules in the cytosol or nucleus. Most common second messengers are cAMP, cGMP, DAG, IP3.
Signal amplification by second messenger can be explained by the example of IP3 which cayses the release of Calcium ions from the intracellular stores and cause contractions.
Answer:
Due to their natural growth.
Explanation:
I would recommend the meat of Nguni cattle to consumers in the locality because of their pure quality. These cattles have excellent resistance to internal and external parasites with natural immunity to kill borne diseases. There is no injections or vaccines are given to these cattles which enables them to grow in natural environment. So due to their natural growth, the meat have higher quality as compared to other cattle's meat.
Answer: Legionnaires' disease
Explanation:
Legionnaires' disease is a kind of pneumonia that is caused by the bacteria.The bacterial infection spreads by breathing the aerosol or mist from the water. The bacteria does not spread from person to person thus the disease is non-contagious.
The bacteria of the disease lives in the aquatic environment and may contaminate the water body. The symptoms of the disease includes the chills, coughs, high fever, headaches and muscle aches. X-ray and lab test can be done to diagnose the disease.
If this is a true false question I would say its true because we have developed technology that is far beyond anything a bat could do.
Photosynthesis still occurs but the amount of red pigment is greater than the amount of green pigment. The chlorophyll still absorbs light energy. The red leaves does not affect the process of photosynthesis.