09 Apr 2022

Samacheer Kalvi 10th Science Unit 15 Answers

10th Science Book Back Answers Unit 15 – Nervous System:

Samacheer Kalvi 10th Standard Science Book Back Questions with Answers PDF uploaded and the same given below. Class-tenth candidates and those preparing for TNPSC exams can check the New Science Book Back Question and Answers PDF below.  Samacheer Kalvi Class 10th Std Science Book Back Answers Biology Unit 15 – Nervous System Solutions are available below. Complete solutions for all 23 Units’ book back questions with a solutions guide uploaded and available on our site. Check the complete Samacheer Kalvi 10th Science Unit 15 Answers below:

We also provide class 10th other units Science Book Back One and Two Mark Solutions Guide on our site. Students looking for a new syllabus 10th standard Science Biology Unit 15 Nervous System Book Back Questions with Answer PDF

For the complete Samacheer Kalvi 10th Science Book Back Solutions Guide PDF, check the link – Samacheer Kalvi 10th Science Book Back Answers




Samacheer Kalvi 10th Science Book Back Answers Biology Unit 15 – Nervous System:

Samacheer Kalvi 10th Science Book Subject One Mark, Two Mark Guide questions and answers are below. Check Science Book Back Questions with Answers. Take the printout and use it for exam purposes.

For Samacheer Kalvi 10th Science Book PDF, check the link – 10th Science Book PDF

10th Science – Biology

Unit 15: Nervous System

I. Choose the best answer:

1. Bipolar neurons are found in
a) retina of eye   b) cerebral cortex   c) embryo   d) respiratory epithelium
Ans.: a) Retina of eye

2. Site for processing of vision, hearing, memory, speech, intelligence, and thought is
a) kidney b) ear c) brain d) lungs
Ans.: c) Brain

3. In a 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
Ans.: d) Receptor, spinal cord, muscle

4. Dendrites transmit impulse cell body and axons transmit impulse cell body.
a) away from, away from b) towards, away from
c) towards, towards d) away from, towards
Ans.: b) Towards, away from

5. The outer most of the three cranial meninges is
a) arachnoid membrane b) piamater c) duramater d) myelin sheath
Ans.: c) Duramater

6. There are pairs of cranial nerves and pairs of spinal nerves.
a) 12, 31   b) 31, 12    c) 12, 13    d) 12, 21
Ans.: a) 12, 31

7. The neurons which carries impulse from the central nervous system to the muscle fibre.
a) afferent neurons   b) association neuron   c) efferent neuron   d) unipolar neuron
Ans.: c) Efferent neuron

8. Which nervous band connects the two cerebral hemispheres of the brain?
a) thalamus   b) hypothalamus   c) corpus callosum   d) pons
Ans.: c) Corpus callosum

9. Node of Ranvier is found in
a) muscles b) axons c) dendrites d) cyton
Ans.: b) axons

10. Vomiting center is located in
a) medulla oblongata b) stomach c) cerebrum d) hypothalamus
Ans.: a) Medulla oblongata

11. Nerve cells do not possess
a) neurilemma   b) sarcolemma   c) axon   d) dendrites
Ans.: b) Sarcolemma

12. A person who met with an accident lost control of body temperature, water balance, and hunger. Which of the following part of the brain is supposed to be damaged?
a) Medulla oblongata   b) cerebrum   c) pons   d) hypothalamus
Ans.: d) Hypothalamus

II. Fill in the blanks

1. ________is the longest cell in our body.   Ans.: Neuron / Nerve cell
2. Impulses travel rapidly in _______neurons.  Ans.: Myelinated
3. A change in the environment that causes an animal to react is called ________.   Ans.: Stimulus
4. ________carries the impulse towards the cell body. Ans.: Dendrite
5. The two antagonistic components of the autonomic nervous system are _______and _________.
Ans.: Sympathetic / Parasympathetic
6. A neuron contains all cell organelles except _______. Ans.: Centriole
7. ________maintains the constant pressure inside the cranium. Ans.: Cerebrospinal fluid
8. ______and ______increases the surface area of the cerebrum. Ans.: Gyri and Sulci
9. The part of the human brain which acts as a relay center is _______. Ans.: Thalamus




III. True or False (Correct the Statement if it is false)

1. Dendrons are the longest fibers that conduct impulses away from the cell body. Ans.: False.
Correct statement: Axon is the longest fibers that conduct impulses away from the cell body.

2. Sympathetic nervous system is a part of the central nervous system. Ans.: False.
Correct statement: Sympathetic nervous system is a part of the Autonomic nervous system.

3. Hypothalamus is the thermoregulatory centre of the human body. Ans.: True.

4. Cerebrum controls the voluntary actions of our body. Ans.: False.
Correct statement: The cerebellum controls the voluntary actions of our body.

5. In the central nervous system myelinated fibers form the white matter. Ans.: True.

6. All the nerves in the body are covered and protected by meninges. Ans.: False.
Correct statement: All the nerves in the body are covered and protected by Epineurium.

7. Cerebrospinal fluid provides nutrition to the brain. Ans.: True.

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

9. Pons helps in regulating respiration. Ans.: True.

IV. Match the following:

Question.

1. Nissil’s granules (a) Forebrain
2. Hypothalamus (b) Peripheral Nervous system
3. Cerebellum (c) Cyton
4. Schwann cell (d) Hindbrain

Answer:
1. (c) Cyton
2. (a) Forebrain
3. (d) Hindbrain
4. (b) Peripheral Nervous system

V. Understand the assertion statement. Justify the reason given and choose the correct choice.

a) Assertion is correct and the 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.
Ans: a) Assertion is correct and the reason is wrong

2. Assertion: Corpus callosum is present in the space between the dura mater and pia mater.
Reason: It serves to maintain the constant intracranial pressure.
Ans : d) Both assertion and reason are wrong

Other Important links for 10th Science Book Answers Solutions:

For the 10th Standard Science Unit 16 book back question and answers solutions PDF, check the link – Samacheer kalvi 10th Science Unit 16 – Plant and Animal Hormones

Click here for the complete Samacheer Kalvi 10th Science Book Back Solution Guide PDF – 10th Science Book Back Solutions




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