Consider the following statements about the human nervous system: 1. The sympathetic nervous system prepares the body for fight-or-flight. 2. The parasympathetic nervous system has a calming effect. 3. Both are part of the somatic nervous system. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about the human nervous system:
1. The sympathetic nervous system prepares the body for fight-or-flight.
2. The parasympathetic nervous system has a calming effect.
3. Both are part of the somatic nervous system.
Which of the above is/are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1 and 2 only
D. 1, 2, and 3
Answer: Option C
Solution (By JKExamLibrary)
Sympathetic (fight or flight) and parasympathetic (rest and digest) are divisions of the autonomic nervous system, not somatic. Thus, 3 is incorrect.
Explanation:
The conversion of milk to curd (yogurt) is a fermentation process primarily caused by lactic acid bacteria (LAB), such as Lactobacillus. These bacteria ferment the lactose (milk sugar) into lactic acid. The lactic acid lowers the pH, causing the milk protein (casein) to coagulate and solidify, forming curd. It also improves the nutritional value by producing Vitamin B12.
Explanation:
Sclerenchyma provides strength, with thick lignified walls; cells are usually dead at maturity. Xylem transports water, phloem transports food, collenchyma is living with uneven thickening.
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