In human body in all _____ pairs of cranial nerves and spinal nerves are present
WBBSE
Class X
Life Science
01 (d) Nervous System
2025
43
Explanation:
In the human body, there are 12 pairs of cranial nerves (emerging from the brain) and 31 pairs of spinal nerves (emerging from the spinal cord), making a total of 43 pairs.
Related Questions
More WBBSE Easy level questions
1/12
Q.
Write one function each of the following five parts of eyeball of human eye: (a)...
A.
Parts Functions (a) Cornea Refracts light rays entering the eye. (b) Lens...
Q.
What is the function of Schwann cell?
A.
Schwann cell forms myelin sheath around peripheral nerve fibres and helps in...
Q.
Mention one role each of hypothalamus and medulla oblongata in the 24 hours daily life...
A.
Hypothalamus: It acts as a centre for regulation of hunger, thirst, feeding...
Q.
Write the names of two structural parts of axon.
A.
Two parts are: Axon hillock Myelin sheath Explanation: The axon hillock is...
Q.
Blind spot is the part of the eye devoid of light sensitive cells formed at...
A.
True. Explanation: The blind spot is an area on the retina where...
Q.
Accommodation is the ability of the retina of the eye to adjust the focal length...
A.
False. Explanation: Accommodation is the ability of the lens of the eye...
Q.
Write two differences between axon and dendron.
A.
Axon Dendron 1. Single, long process in a neuron. 1. Several, short...
Q.
Draw a scientific diagram of the vertical section of a human eyeball and label the...
A.
Vertical section of a human eyeball Or The anaphase stage of mitotic...
Q.
Cornea, Choroid, Lens, Aqueous humour, Iris, Vitreous humour — how many of these are refractory...
A.
(b) 4 Explanation The refractory media of the human eye are the...
Q.
Which of the following is not a structural feature of an Axon? (a) Node of...
A.
(c) Nissl granule Explanation A neuron consists of three parts — cell...
Q.
Name any two structural parts of Neurone
A.
Axon and Dendron. Explanation: The axon carries impulses away from the cell...
Q.
Explain the causes of Myopia and Hyperopia
A.
Defect Cause Myopia (Near-sightedness) This defect occurs when the eyeball becomes too...