Neural Control and Coordination - Online Test
Q1. Nissl’s granules are absent in :
Answer : Option B
Explaination / Solution:
Nissl’s grains are mainly present in cyton and dendrite. These granules are rough endoplasmic reticulum with rosettes of free ribosome, the site for protein synthesis. It is absent in axon.
Q2. In the prosencephalon, first and second ventricles open into third ventricle by :
Answer : Option D
Explaination / Solution:
In prosencephlon, the first and second ventricles open into third ventricles by foramen of Monro. It is the opening that connects the left and right sides of lateral ventricle in brain.
Q3. The property which doesn’t belong to nerve fibres is :
Answer : Option A
Explaination / Solution:
Nerve fibres are specialized to transmit impulses form one part of the body to other. Nerve fibres do not shows the property of elasticity and contractility.
Q4. Hypothalamus helps to maintain homeostasis by controlling hunger, thirst, blood pressure, temperature feelings etc. So it is an important link between
Answer : Option D
Explaination / Solution:
One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis). The hypothalamus is located below the thalamus and is part of the limbic system
Q5. Brain stem is the support system of brain and is the collective name for :
Answer : Option B
Explaination / Solution:
The brainstem (or brain stem) is the posterior part of the brain, adjoining and structurally continuous with the spinal cord. In the human brain the brainstem includes the midbrain, the pons, and the medulla oblongata. Sometimes the diencephalon, the caudal part of the forebrain, is included.
Q6.
Match the following :
| Column A | Column B |
| a) Unipolar nerves | i) Nerve cells of retina |
| b) Mixed nerves | ii) Nerve cells of cerebral cortex |
| c) bipolar nerves | iii) Nerves of embryonic stage |
| d) Multipolar nerves | iv) All the spinal nerves |
Answer : Option A
Explaination / Solution:
Unipolar nerves are present in nerves of embryonic stage. Mixed nerves are found in all the spinal nerves. Bipolar nerves are present in nerve cells of retina. Multipolarnerves are present in nerve cells of cerebral cortex.
Q7.
Match the following :
| Column A | Column B |
| a) Motor Neuron | i) carry impulse away from cyton |
| b) Axon | ii) carry impulse from receptor to CNS |
| c) Afferent Neuron | iii) carry impulse towards cyton |
| d) Dendrite | iv) carry impulse from CNS to effector |
Answer : Option C
Explaination / Solution:
Motor neuron carry impulse from CNS to effector. Axon carry impulse away from cyton. Afferent neuron carry impulse from receptor to CNS and dendrite carry impulsetowards cyton.
Q8. Complete the following hierarchical chart showing parts of nervous system :
Answer : Option B
Explaination / Solution:
Human nervous system consists of central nervous system and peripheral nervous system. Peripheral nervous system includes 12 pairs of cranial nerves emerging from brain and 31 pairs of spinal nerves arising from spinal nerve.
Q9.
In the following figure a synapse is shown :
i & ii (from up to down)
1) (i) is presynaptic membrane and (ii) is postsynaptic membrane.
2) synaptic vesicles are in postsynaptic knob.
3) neurotransmitter receptors are located on postsynaptic membrane.
Answer : Option C
Explaination / Solution:
The synapse is formed by the membranes of apre-synaptic neuron and a post-synaptic neuron, which may or may notbe separated by a gap called synaptic cleft. The neurotransmitter receptors are located on postsynaptic membrane.
Q10. Due to refractory period , a nerve fibre in human body on an average transmits about :
Answer : Option B
Explaination / Solution:
Refractory period is the time taken to nerve become ready to conduct other impulse. Due to this refractory period, a nerve fibre in human body on an average transmits about 1000 impulses per seconds.
