The glial cells forming myelin sheaths are called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. The gaps (approximately 1 micrometer wide) formed between myelin sheath cells long the axons are called Nodes of Ranvier.
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Radio waves from smartphones may be carcinogenic - Mobile phones and their towers generate radio waves. Several studies have suggested that though low frequency radio waves aren’t harmful to humans, but over exposure to them may lead to tumours in the body.
Smartphones cause anxiety, increased stress - Cancer aside, smartphones cause a variety of health issues. They have been found to increase anxiety and mental stress in teens. Mobile radiations may also cause learning disabilities and lowered IQ in infants, according to some reports.
Centers for Disease Control and Prevention
make the ability, knowledge, and tools that people and communities need to
protect their health - through health awareness, prevention of disease, injury
and disability, and preparedness for new threats. This is also to prosper its
mission by collaborating with partners throughout the nation and the world to
monitor health, detect and investigate health problems.
I think it is C. Spinal cord controls the nerve impulses
Answer:
The answer is B. Vitamin A
