Name any two structural parts of Neurone

Choose the odd one and write it: Olfactory nerve, Vagus nerve, Optic nerve, Auditory nerve

The focal length of lens increases in case of seeing distant objects.

Reflex action is fast, spontaneous and ____.

Decide which of the following sequence is correct — (a) Receptor → Effector → Sensory Nerve → Motor Nerve → Nerve Centre (b) Receptor → Nerve Centre → Motor Nerve → Sensory Nerve → Effector (c) Receptor → Sensory Nerve → Nerve Centre → Motor Nerve → Effector (d) Receptor → Motor Nerve → Effector → Sensory Nerve → Nerve Centre

Match the words of Column-A with that of Column-B and select which of the following options is correct Column-A Column-B A. CSF i. Protects Central Nervous System from mechanical injury B. Meninges ii. Helps in the formation of the myelin sheath C. Neuroglia iii. Acts as a shock absorber (a) A-(ii) B-(iii) C-(i) (b) A-(iii) B-(i) C-(ii) (c) A-(i) B-(ii) C-(iii) (d) A-(i) B-(iii) C-(ii)

Select the correct pair — (a) Sclera—Absorbs excess light within the eyeball (b) Choroid—Provides definite shape of the eyeball (c) Lens—Causes refraction of light and accomplishes accommodation (d) Retina—Holds the lens with the help of the suspensory ligaments

Write the names of two structural parts of axon.

Write two differences between axon and dendron.

Mention one role each of hypothalamus and medulla oblongata in the 24 hours daily life of a person

Blind spot is the part of the eye devoid of light sensitive cells formed at the junction of optic nerve and retina.

Accommodation is the ability of the retina of the eye to adjust the focal length as needed.