SSC CGL Science – Human Body II: Nervous, Endocrine, Skeletal, Muscular & Reproductive Systems – Level 1 · Warm-up · Tier I Level

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SSC CGL Science – Human Body II: Nervous, Endocrine, Skeletal, Muscular & Reproductive Systems – Level 1 · Warm-up · Tier I Level – 14 questions, subject: General Science. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
How many bones are there in the skeleton of a normal adult human?

Correct Answer: A [206]

Explanation:

80 axial + 126 appendicular = 206.

2.  
The smallest bone in the human body is the:

Correct Answer: D [Stapes]

Explanation:

Stapes (stirrup) in the middle ear; femur is the longest.

3.  
Which part of the brain controls thinking, memory and voluntary actions?

Correct Answer: C [Cerebrum]

Explanation:

Cerebrum – the largest part of the fore-brain.

4.  
Which hormone lowers the blood sugar level?

Correct Answer: B [Insulin]

Explanation:

Insulin from β-cells; glucagon raises sugar.

5.  
Which gland is both exocrine and endocrine?

Correct Answer: C [Pancreas]

Explanation:

The pancreas pours digestive juice through a duct and releases insulin and glucagon into the blood.

6.  
The structural and functional unit of the nervous system is the:

Correct Answer: A [Neuron]

Explanation:

Answer: Neuron. Neuron = nerve cell.

7.  
How many pairs of spinal nerves arise from the human spinal cord?

Correct Answer: D [31]

Explanation:

31 pairs of spinal nerves; 12 pairs of cranial nerves come from the brain.

8.  
The three meninges covering the brain, from outside to inside, are:

Correct Answer: B [dura mater, arachnoid, pia mater]

Explanation:

Dura (tough, outer) – arachnoid (middle) – pia (delicate, inner).

9.  
Fill in the blankThe junction between two neurons is called a ______.

Correct Answer: D [synapse]

Explanation:

Synapse – chemicals carry the message across.

10.  
The knee joint is an example of a:

Correct Answer: C [Hinge joint]

Explanation:

Moves in one plane like a door hinge.

11.  
How many pairs of ribs are there in humans?

Correct Answer: B [12]

Explanation:

12 pairs = 24 ribs (7 true, 3 false, 2 floating).

12.  
Melatonin, which controls the sleep–wake rhythm, is secreted by the:

Correct Answer: A [Pineal gland]

Explanation:

Pineal – melatonin; diurnal rhythm.

13.  
The hormone testosterone is produced by the:

Correct Answer: C [Testes]

Explanation:

Testes – testosterone; ovaries – oestrogen and progesterone.

14.  
True/False drillhow many are TRUE?
I. The cerebellum maintains balance.
II. Thyroxine is secreted by the pituitary.
III. Adrenaline increases the heart rate.
IV. The stapes is the longest bone.

Correct Answer: B [Two]

Explanation:

II false (thyroid secretes thyroxine); IV false (stapes is the smallest).

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 General Science book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-general-science

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