Nervous System Book Back Questions 10th Science Lesson 15

10th Science Lesson 15

15] Nervous System

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

Each neuron can transmit 1,000 nerve impulses per second and make as many a ten thousands of synaptic contacts with other neurons.

Meningitis is an inflammation of the meninges. It can occur when fluid surrounding the meninges becomes infected. The most common causes of meningitis are viral and bacterial infections.

The human brain constitutes nearly 60 percent of fat. The most crucial molecules that determine our brain’s integrity and the ability are Essential Fatty Acids (EFAs). EFAs cannot be synthesised and must be obtained from food. Fish, green leafy vegetables, almond, walnut are rich sources of EFAs.

Electroencephalogram (EEG) is an instrument which records the electrical impulses of brain. An EEG can detect abnormalities in the brain waves and help in diagnoses of seizures, epilepsy, brain tumors, head injuries, etc.

Choose the best answers:

1. Bipolar neurons are found in

(a) Retina of eye

(b) Cerebral cortex

(c) Embryo

(d) Respiratory epithelium

2. Site for processing of vision, hearing, memory, speech, intelligence and thought is

(a) Kidney

(b) Ear

(c) Brain

(d) Lungs

3. In reflex action, the reflex arc is formed by

(a) Brain, spinal cord, muscle

(b) Receptor, muscle, spinal cord

(c) Muscle, receptor, brain

(d) Receptor, spinal cord, muscle

4. Dendrites transmit impulse ___________ cell body and axon transmit impulse _____________ cell body.

(a) Away from, away from

(b) Towards, away from

(c) Towards, towards

(d) Away from, towards

5. The outer most of the three cranial meninges is

(a) Arachnoid membrane

(b) Piameter

(c) Durameter

(d) Myelin sheath

6. There are ___________ pairs of cranial nerves and ______________ pairs of spinal nerves.

(a) 12, 31

(b) 31, 12

(c) 12, 13

(d) 12, 21

7. The nervous which carries impulse from the central nervous system to the muscle fibre.

(a) Afferent neurons

(b) Association neurons

(c) Efferent neuron

(d) Unipolar neuron

8. Which nervous band connects the two cerebral hemispheres of brain?

(a) Thalamus

(b) Hypothalamus

(c) Corpus callosum

(d) Pons

9. Node of Ranvier is found in

(a) Muscles

(b) Axons

(c) Dendrites

(d) Cyton

10. Vomiting centre is located in

(a) Medulla oblongata

(b) Stomach

(c) Cerebrum

(d) Hypothalamus

11. Nerve cells do not possess

(a) Neurilemma

(b) Sarcolemma

(c) Axon

(d) Dendrites

12. A person who met with an accident lost control of body temperature, water balance, and hunger. Which of the following part of brain is supposed to be damaged?

(a) Medulla oblongata

(b) Cerebrum

(c) Pons

(d) Hypothalamus

Fill in the blanks:

1. _____________ is the longest cell in our body.

1. Axon
2. Neuron
3. RBC
4. None of the above

2. Impulses travels rapidly in ___________ neurons.

1. Sheath
2. Myelin Sheath
3. Axon
4. None of the above

3. A change in the environment that causes an animal to react is called ______________

1. Action
2. Hibernation
3. Reaction or response
4. None of the above

4. ___________________ carries the impulse towards the cell body.

1. Axon
2. Myelin Sheath
3. Dendrites
4. None of the above

5. The two antagonistic component of autonomic nervous system are _____________ and _____________

1. Sympathetic, asympathetic
2. Sympathetic, Parasympathetic
3. Sympathetic, Sympathetic
4. None of the above

6. A neuron contains all cell organelles except _____________

1. Golgi apparatus
2. Axon
3. Myelin Sheath
4. None of the above

7. ___________ maintains the constant pressure inside the cranium.

1. Spinal fluid
2. Plasma fluid
3. Cerebrospinal fluid
4. None of the above
5. _____________ and _________ increases the surface area of cerebrum.
6. Gyri and sulci
7. Golgi apparatus
8. Myelin and sheath
9. None of the above

9. The part of human brain which acts as relay centre is ______________

1. Hypo thalamus
2. Hyper thalamus
3. Thalamus
4. None of the above

State true or false. If false, correct the statement:

1. Dendrons are the longest fibres that conducts impulses away from the cell body.

2. Sympathetic nervous system is a part of central nervous system.

3. Hypothalamus is the thermoregulatory centre of human body.

4. Cerebrum controls the voluntary actions of our body.

5. In the central nervous system myelinated fibres form the white matter.

6. All the nerves in the body are covered and protected by meninges.

7. Cerebrospinal fluid provides nutrition to brain.

8. Reflex arc allows the rapid response of the body to a stimulus.

9. Pons helps in regulating respiration.

Match the following:

Column I – Column II

1. Nissil’s granules – Forebrain

2. Hypothalamus – Peripheral nervous system

3. Cerebellum – Cyton

4. Schwann cell – Hindbrain

Consider the statements given below and choose the correct option:

(a) Assertion is correct and reason is wrong

(b) Reason is correct and the assertion is wrong

(c) Both assertion and reason are correct

(d) Both assertion and reason are wrong

1. Assertion: Cerebrospinal fluid is present throughout the central nervous system.

Reason: Cerebrospinal fluid has no such functions.

2. Assertion: Corpus callosum is present in space between the duramater and piameter.

Reason: It serves to maintain the constant intracranial pressure.

Answers:

Choose the correct answers:

1.Retina of the eye 2. Brain 3. Receptor, Muscle, Spinal chord 4. Towards, away from 5.

1. Durameter 6. 12,31 7. Efferent neuron

8. corpus callosum 9. Axons 10.

1. medulla oblongata 11. Sarcolemma 12. Hypothalamus

Fill in the blanks:

1.Axon 2. Myelin Sheath of 3. Reaction or responses 4. Dendrites 5. Sympathetic, Parasympathetic 6. Golgi apparatus in axon 7. Cerebrospinal fluid 8.

1. Gyri and Sulci 9. Thalamus

True or False:

1. False – Axons are the longest fibres that conduct impulses away from the cell body.
2. False – Sympathetic nervous system is a part of the autonomic nervous system.
3. True
4. True
5. False – In the central nervous system, two types of matter such as white matter or grey matter, is formed, with respect to the presence or absence of myelin sheath.
6. False – The brain is covered by three connective tissue membrane or meninges.
7. True
8. True
9. True

Match the following:

1. Cyton 2. Forebrain 3. Hind brain 4. Peripheral Nervous system

Reason and assertion:

1. Assertion is correct and reason is wrong
2. Both assertion and reason are wrong