Answer: True
HIV infects a type of white blood cell in the body's immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases. HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together).
Explanation:
T-cells, the thymus cells, work in a similar way but destroy infected cells rather than manufacture antibodies. In HIV infection, the body mounts a very strong antibody response in the first few weeks that partially works, bringing the viral load down from millions to, on average, about 50,000 copies/ml.
The area was once covered by sea, mountains, deserts, and coastal plains.
Answer:
somatic nervous system
Explanation:
The motor division of the peripheral nervous system includes a somatic nervous system and an autonomic nervous system. The somatic nervous system (SNS) delivers motor information from the central nervous system to skeletal muscles only. Therefore, the motor responses of the somatic nervous system are consciously controlled by humans. This makes it control the voluntary actions of the body. The somatic nervous system includes the somatic motor neurons that connect the skeletal muscles with the central nervous system.
Fossils buried really deep in the Earth and some buried somewhat down would look similar but with certain small changes.
