The fluid that surrounds the brain and spinal cord is:
A. Lymph
B. Synovial fluid
C. Cerebrospinal fluid
D. Pleural fluid
Answer: Option C
Solution (By JKSSB Mock Tests)
Cerebrospinal fluid (CSF) is a clear fluid produced by the choroid plexus in the ventricles of the brain. It cushions the CNS, provides buoyancy, removes waste, and maintains chemical stability. Synovial fluid is in joints, pleural fluid in chest cavity, lymph in lymphatic vessels.
Explanation:
Dengue fever is a mosquito-borne viral infection caused by the Dengue virus (four serotypes). It is primarily transmitted by the bite of an infected female Aedes aegypti mosquito (and Aedes albopictus). These mosquitoes typically bite during the day. Anopheles transmits malaria, and Culex transmits filariasis and Japanese encephalitis.
Consider the following statements about the human kidneys:
1. They are located in the abdominal cavity.
2. They produce the hormone renin.
3. They filter approximately 180 liters of blood per day.
Which of the above is/are correct?
Explanation:
Kidneys are retroperitoneal, not in the abdominal cavity proper. They produce renin, and filter ~180 L/day (GFR ~125 mL/min). So 1 is incorrect.
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