Samacheer Kalvi 5th Science Guide Organ System Term 1 Chapter 1 Text Book Back Questions and Answers

 

Book Exercise

Samacheer Kalvi 5th Science Guide Organ System Text Book Back Questions and Answers

Tamilnadu Samacheer Kalvi 5th Science Solutions

Term 1

Chapter 1

 Organ System

I. Choose the Correct Answer:

Question 1.

What is the length of the alimentary canal?

a) 3-5 m

b) 5-6 m

c) 9-11 m

d) 6-9 m

Answer:

d) 6-9 m

Question 2.

Which organ is involved in respiration?

a) Kidney

b) Lungs

c) Heart

d) Brain

Answer:

b) Lungs

Question 3.

How many kidneys do we have?

a) 2

b) 3

c) 1

d) 4

Answer:

a) 2

Question 4.

Functional unit of brain is

a) Neuron

b) Nephron

c) Brain stem

d) Nerves

Answer:

a) Neuron

Question 5.

Blood is bumped by

a) Lungs

b) Heart

c) Kidneys

d) Bones

Answer:

b) Heart

II. Fill in the blanks:

Question 1.

A group of organs together make up an _______ system.

Answer:

organ system

Question 2.

The process by which the body removes waste is called _______.

Answer:

Excretion

Question 3.

The number of chambers in human heart is _______.

Answer:

Four

Question 4.

The functional unit of kidney is _______.

Answer:

Nephron

Question 5.

The human nervous system is divided into _______ parts.

Answer:

Two

III. Say True or False:

Question 1.

The circulatory system is made up of the heart, blood, and blood vessels.

Answer: True

Question 2.

Important function of the heart is to transport blood with nutrients, oxygen, waste, and hormones.

Answer: True

Question 3.

The brain is protected by the rib cage.

Answer:

False

Question 4.

The functional unit of kidney is neuron.

Answer:

False

IV. Circle the odd one:

Question 1:

1. a) Mouth b) Buccal cavity c) Pharynx d) Lungs

2. a) Nostrils b) Nasal cavity c) Pharynx d) Stomach

3. a) Mouth b) Esophagus c) Stomach d) Kidney

4. a) Taste b) Hear c) Think d) Smell

5. a) Cerebrum b) Cerebellum c) Medulla Oblongata d) Nephron

V Match the following.

Digestive System   - Kidney

Respiratory system   - Brain

Circulatory system    - Alimentary canal

Excretory system   - Heart

Nervous System    - Lungs

V Match the following.

Digestive System   - Alimentary canal

Respiratory system   - Lungs

Circulatory system    - Heart

Excretory system   - Kidney

Nervous System    - Brain

VI. Answer briefly:

Question 1.

Name the salivary glands in our mouth?

Answer:

The three parts of salivary glands in our mouth are parotid, sublingual and submandibular glands.

Question 2.

What is respiration?

Answer:

The process of providing oxygen to the tissues of the body and removing carbon dioxide from the tissues is called respiration.

Question 3.

What is the function of pericardial fluid?

Answer:

The space between the membranes is filled with pericardial fluid. This fluid protects the heart from shock

Question

4.Name the chambers in human heart?

Answer:

The heart is divided into four chambers. Two upper chambers are called atria or auricles. Two lower thicker chambers are called ventricles. The upper and lower chambers are separated by a muscular wall or tissue known as auriculo-ventricular septum of the heart.

Question 5.

Arrange the excretory system in correct sequence.

(Urinary bladder, Ureter, Kidney, Urethra).

Answer:

Kidney, Ureter, Urinary bladder, Urethra.

Question 6.

What are the two parts of peripheral nervous system?

Answer:

Peripheral nervous system consists of nerves extending from spinal cord to all parts of the body. It is made up of 2 parts.

Somatic nervous system

Autonomous nervous system.

Question 7.

What are the functions of blood?

Answer:

Blood transports nutrients, oxygen, wastes, and hormones.

It regulates the water level and body temperature.

It takes oxygen to tissues and cells finally reaches the lungs to take oxygen again.

VII Answer in detail.

1. List out the functions of the digestive system.

2. Explain the main parts of the circulatory system.

3. Explain three major parts of human brain.

4. Label the diagram given below.

Question 1.

List out the functions of the digestive system.

Answer:

The process of conversion of complex food molecules into simpler molecules is called digestion.

Saliva moistens food.

Salivary enzymes which break down complex starch into simple carbohydrate molecules.

Digestive enzymes are used for digesting fats, proteins, and carbohydrates.

Question 2.

Explain the main parts of the circulatory system.

Answer:

In circulatory system, Blood is circulated to transport oxygen and nutrients to every part of the body through circulatory system.

Circulatory system consists of the

Heart

Blood

Blood Vessels

Question 3.

Explain three major parts of human brain.

Answer:

Human brain is divided into 3 major parts.

Fore Brain (Cerebrum)

Mid Brain (Cerebellum)

Hind Brain (Medulla Oblongata)

Question 4.

Label the diagram given below.

VIII. Questions based on higher order thinking (HOT):

Question 1. Why It is important to wear helmet while riding a bike?

Answer:

Wearing helmet helps to protect your life and protect your head from danger. The head and brain is the most vulnerable to injury in a motorcycle accident. Drivers and passengers wearing helmets increase their chances of survival over non-helmet wearers. Riders who do not wear helmets are at risk of suffering a traumatic brain injury, if they are in accident. Brain trauma often results in spinal cord injuries and disability that requires extended care and physical therapy. The damaged brain may deteriorate after hospitalization and die days to weeks after the injury due to secondary injury.

Question 2.

Eating fast-food and junk food affects our health. Justify.

Answer:

Fast food is usually higher in fat, calories cholesterol, and sodium in comparison to homemade meals.

Eating too much fast food can increase the risk for health problems such as high blood pressure, heart disease, and obesity.

Eating a poor quality diet high in junk food is linked to a higher risk of obesity, depression, digestive issues, heart diseases and stroke, type 2 diabetes, cancer, and early death.

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