alleryThe eye's blind spot is associated with the exit of the:
- Auditory nerve
- Optic nerve
- Olfactory nerve
- Facial nerve
Show answer and solution
Correct answer: B. Optic nerve
The blind spot occurs at the retinal site where the optic nerve leaves the eye.
ICSE Class 10 Human Anatomy & Coordination — practice questions — page 10
Explore 336 free Human Anatomy & Coordination questions in ICSE Class 10 Biology. Open each question or exercise to read its content, reference answers and available explanation.
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The eye's blind spot is associated with the exit of the:Read the answer and worked solution →Gaps between adjacent myelin sheaths on an axon are called:Read the answer and worked solution →Efferent nerve fibres carry commands:Read the answer and worked solution →For distant focus, ciliary muscles relax. What follows?Read the answer and worked solution →Optic nerve severed; retinal focusing is normal. Which function fails?Read the answer and worked solution →Cones fail; rods work. Which outcome fits?Read the answer and worked solution →Hair cells fail; cochlear fluid still vibrates. Which conversion fails?Read the answer and worked solution →Ossicles become fixed; cochlea and eardrum stay intact. What is reduced?Read the answer and worked solution →Only semicircular canals fail; cochlea works. Which outcome fits?Read the answer and worked solution →Which sound pathway has the correct sequence?Read the answer and worked solution →How does a concave lens correct a myopic eye's distant focus?Read the answer and worked solution →Which bony structure protects the spinal cord?Read the answer and worked solution →How is grey matter arranged in a spinal cord cross-section?Read the answer and worked solution →Besides reflexes, a main spinal cord function is:Read the answer and worked solution →Reflex withdrawal from a hot object is typically:Read the answer and worked solution →In a reflex arc, the sensory neuron carries signals from:Read the answer and worked solution →In reflex hand withdrawal, which is the effector?Read the answer and worked solution →In a three-neuron reflex arc, the impulse order is:Read the answer and worked solution →A skin receptor's sensory axon is blocked. Which reflex step fails first?Read the answer and worked solution →A spinal reflex starts before conscious pain awareness. The brain:Read the answer and worked solution →Which action is clearly voluntary?Read the answer and worked solution →Acquired rather than natural reflexes require:Read the answer and worked solution →Salivation to food in the mouth before any training is a:Read the answer and worked solution →A dog salivates to a bell after bell-food pairings. The salivation is a:Read the answer and worked solution →After bell-food training, repeated bells without food usually make salivation:Read the answer and worked solution →The thyroid's two lobes lieRead the answer and worked solution →Each adrenal gland liesRead the answer and worked solution →Which hormone is released by the adrenal medulla?Read the answer and worked solution →Which hormone rapidly supports the fight-or-flight response?Read the answer and worked solution →Adrenaline's immediate effects generally includeRead the answer and worked solution →
Worked practice questions
Gaps between adjacent myelin sheaths on an axon are called:
- Synaptic knobs
- Nissl's granules
- Dendritic branches
- Nodes of Ranvier
Show answer and solution
Correct answer: D. Nodes of Ranvier
Nodes of Ranvier are the gaps between successive myelin segments around an axon.
Efferent nerve fibres carry commands:
- From organs into the CNS
- From CNS to peripheral organs
- Only into sensory receptors
- Between the two meninges
Show answer and solution
Correct answer: B. From CNS to peripheral organs
Efferent fibres transmit regulatory impulses outwards from the CNS to peripheral tissues or organs.
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