Neural Control and Co-ordination

Transmission of nerve impulse, across the synapse is accomplished by

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Transmission of nerve impulse, across a synapse is accomplished by neurotransmitters because of synapse. It separates one neuron from other.

Which of the following is the part of outer ear?

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Canal is the part of outer ear. The outer ear consists of the pinna and external auditory meatus called canal.

Which of the following separates the pre- and post-synaptic neurons at a chemical synapse?

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At a chemical synapse, the membranes of the pre and post-synaptic neurons are separated by a fluid-filled space called synaptic cleft.

The point in eye of mammals from which optic nerves and blood vessels leaves the eye ball is

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Blind spot is the place found close to the yellow spot in the human eye from where optic nerve exits and goes to the brain.

The nervous strip connecting both the cerebral hemispheres is

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It coordinates the activity of both the cerebral hemispheres.

Iris is part of

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Iris consists of two layers, outer thickened layer is continuation with choroid and inner simple cuboidal epithelium layer continued from retina.

Which of the following statements is true?

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Midbrain and hindbrain form the brain stem.

The dendrite carries impulses

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The dendrites contain neurofibrils, neurotubules and Nissl's granules. They conduct nerve impulse towards the cell body (cyton).

If there is a problem in this part, vibrations in the air can’t be collected.

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The outer ear consists of the pinna and external auditory meatus (canal) and pinna is responsible for collecting the vibrations in the air which produce sound.

Which of the following is the part of the central neural system?

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The human neural system is divided into central neural system (CNS) and peripheral neural system (PNS). The CNS includes the brain and the spinal cord whereas the PNS includes all the nerves of the body associated with the CNS.

Which of the following is non-myelinated nerve fibre?

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Non-medullated fibres are present in autonomic nerves.

The organ of corti in human is concerned with the sense of

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The organ of corti in human is concerned with the sense of hearing. It rests on the basilar membrane, which are stimulated by sound waves.

Which of the following has a well developed neural system?

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Vertebrates have a well developed neural system when compare to the other organisms given in the options.

The nodes of ranvier are

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The nodes of ranvier are the points in which the axons is exposed.

Function of iris is to

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Iris controls the size of pupil by contracting or relaxing of its circular muscles. It controls the amount of light entering in eye.

Some cell in our body can be over a feet long. They are

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Certain neurons or nerve cells may almost equal the length of body itself.

Physiological state of body is controlled by

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Hypothalamus controls the physiological state of body such eating, drinking, body temperature, etc.

Which of the following gives the eye its shape?

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The vitreous body is the biggest part of the eye which is responsible for its shape.

Schwann cell is found around:

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Schwann cells are found around axon of myelinated fibers. They secrete myelin sheath around axon.

Breathing is controlled by

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Medulla oblangata contains centre for the autonomic reflex control of respiration, heart beat and these centres are called vital centres.

Which of the following helps in the transmission of nerve impulses?

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Neurotransmitters are the chemicals that help in the transmission of nerve impulses at synapses.

Axon part of the neuron is highly modified for which of the following function?

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Axons are modified for the conduction of impulses away from CNS.

The arachnoid membrane covers the

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Arachnoidmater lies between the duramater and piamater.

Which of the following gets impulses from the somatic neural system?

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The somatic neural system relays impulses from the CNS to skeletal muscles.

Which of the following contains the auditory receptors?

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The organ of corti is a structure located on the basilar membrane. This contains hair cells which act as auditory receptors.

Which of the following is a photoreceptor cell?

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Eyes contain two types of photoreceptor cells called rods and cones. These cells contain light-sensitive proteins called the photopigments.

If a person has lost his memory in an accident, the following part of the brain have got injured.

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A mammal, from whose brain cerebrum is removed loses all responses that depend upon consciousness and memory.

Which of the following parts is called blind spot?

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Portion where photoreceptors are absent are called blind spot.

White matter is composed of

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A dense network of white medullated nerve fibres constitute the white matter.

The membranes enclosing the brain and spinal cord are known as

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Brain and spinal chord are surrounded by three meninges-duramater, piamater and arachnoid in mammals.

Class 11th Biology - 21 Neural Control and Co-ordination MCQs
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