Text Book Back Questions and Answers - Chapter 3 Tissue Level of Organisation 11th Biology Zoology Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

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On April 24, 2024, 11:35 AM

Tissue Level of Organisation
Text Book Back Questions and Answers
Choose the correct answer:
Question 1.
The main function of the cuboidal epithelium is -
(a) Protection
(b) Secretion
(c) Absorption
(d) Both (b) and (c)
Answer:
(d) Both (b) and (c)
Question 2.
The ciliated epithelium lines the -
(a) Skin
(b) Digestive tract
(c) Gall bladder
(d) Trachea
Answer:
(d) Trachea
Question 3.
What type of fibres are found in connective tissue matrix?
(a) Collagen
(b) Areolar
(c) Cartilage
(d) Tubular
Answer:
(a) Collagen
Question 4.
Prevention of substances from leaking across the tissue is provided by -
(a) Tight junction

(b) Adhering junction
(c) Gap junction
(d) Elastic junction
Answer:
(a) Tight junction
Question 5.
Non-shivering thermogenesis in neonates produces heat through -
(a) White fat
(b) Brown fat
(c) Yellow fat
(d) Colourless fat
Answer:
(b) Brown fat
Question 6.
Some epithelia are pseudostratified. What does this mean?
Answer:
Pseudostratified epithelial cells are columnar, but unequal in size. Although the epithelium is single layered yet it appears to be multilayered due to the fact that nuclei lie at different levels in different cells.
Question 7.
Differentiate white adipose tissue from brown adipose tissue.
Answer:
Adipose tissue:
- Adipose tissue is the group of fat cells.
- It stores fats.
- It releases energy while fasting.
Brown Adipose Tissue:
- Adipose tissue which contains abundant mitochondria are called brown adipose tissue.
- It is used to warm the blood stream to warm the body.
- It produces heat by non-shivering thermogenesis.

Question 8.
Why blood is considered as a typical connective tissue?
Answer:
Blood is considered as a typical connective tissue because it is the fluid connective tissue containing plasma, RBCs, WBCs and platelets. It functions as the transport medium for the cardiovascular system carrying nutrients, nitrogenous wastes and respiratory gases throughout the body.
Question 9.
Differentiate between elastic fibres and elastic connective tissue.
Answer:
Elastic fibres:
- It contains elastin and other proteins and glycoproteins.
- It attaches muscles and bones and one bone to another bone.
- It withstands tensile stress when pulling force is applied in one direction or in many directions.
Elastic connective tissue:
- It contains high proportion of elastic fibres.
- It is found in the walls of large arteries, ligaments associated with vertebral column and within the walls of the bronchial tubes.
- It allows recoil of tissues after stretching.
Question 10.
Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.
Answer:
1. Secretion and absorption :
Cuboidal epithelium in kidney tubules, ducts. Columnar epithelium found in the digestive tract.
2. Filtration :
Squamous epithelium found in the glomerulus of kidney.

3. Ciliated epithelium :
Found in the bronchi, uterine tubes propels the materials due to ciliary actions.
Question 11.
Write the classification of connective tissue and their functions.
Answer:
There are four main classes of connective tissues.
- Connective tissue proper
- Cartilage
- Bones
- Blood
The major functions of connective tissues are binding and support, protection, insulation and transportation of substances.
Question 12.
What is an epithelium? Enumerate the characteristic features of different epithelia.
Answer:
Epithelial tissue is sheet of cells that covers the body surface or lines the body cavity.
- Simple epithelium is single layered.
- Squamous epithelium is made of flattened cells with irregular boundaries.
- Columnar epithelium is made of column like cells with round to oval nuclei at the base.
- Ciliated epithelium has ciilia at the free end.
- Compound epithelium is made of multi-layered cells.
In-Text Questions Solved
Question 1.
Stratified epithelia are "built" for protection or to resist abrasion. What are the simple epithelia better at?
Answer:

The simple epithelia are better at absorption, secretion of mucus, enzymes and other substances.
Question 2.
What type of connective tissue is damaged when one get cut on his index finger accidently?
Answer:
The Areolar connective tissue is damaged when finger gets cut.
Question 3.
The stored lipids are in the form of adipose tissue. Are they coloured? Why?
Answer:
The white adipose tissue is called white fat. The adipose that has abundant mitochondria is called Brown fat.
Question 4.
You are looking at a slide of a tissue through the compound microscope and you see striped branching cells that connect with one another. What type of muscle are you viewing?
Answer:
I am viewing the skeletal muscle.
Question 5.
A player has sustained a severe injury during football practice and was told that he has a torn knee cartilage. Can he expect a quick uneventful recovery? Explain your response.
Answer:
The knee cartilage is an important connective tissue. Since the knee moves during locomotion, a quick, uneventful recovery cannot take place. Complete rest to the knee joint is necessary.
Question 6.
An overweight high school student, is overheard telling her friend that she is going to research how she can transform some of her white fat to brown fat. What is her rationale here (assuming it is possible)?
Answer:
The white fat stores nutrients while the brown fat warms the body. The student feels that she may bring down her weight by converting brown fat to white fat.
Textbook Activities Solved
Question 1.
Students are asked to identify the unlabelled slides of tissues and to classify them. Similar exercise can also be accomplished by projecting unlabelled histological images on a screen. They can identify the slides of different tissues through microscope.
Answer:
Do it yourself.
Question 2.
The preparation of smear of stratified squamous epithelia from the inner lining of cheek allows the students to make their own slides using biological stain. They will have the experience of examining their cheek cells.
Answer:
Do it yourself.
Entrance Examination Questions Solved
Question 1.
Transitional epithelium occurs in
(a) Blood vessels
(b) Trachea
(c) Kidney
(d) Ureter/urinary bladder
Answer:
(d) Ureter/urinary bladder
Question 2.
The study of tissues is known as 
(a) Physiology
(b) Ecology
(c) Histology
(d) Anatomy

Answer:
(c) Histology
Question 3.
Find out the wrong match :
(a) Eosinophils Allergic response
(b) Basophils Secrete histamine and serotonin
(c) Monocytes Secrete heparin
(d) Lymphocytes Immune response
Answer:
(c) Monocytes Secrete heparin
Question 4.
The outer covering of cartilage is called
(a) Peritoneum
(b) Periosteum
(c) Endosteum
(d) Perichondrium
Answer:
(d) Perichondrium
Question 5.
Skin is
(a) Cubiodal epithelium
(b) Stratified epithelium
(c) Columnar epithelium
(d) Pseudostratified epithelium
Answer:
(b) Stratified epithelium
Question 6.
Match the animals listed in column - I to blood listed in column - II.

(a) $(P-i i i),(Q-i v),(R-i),(S-i i)$
(b) $(P-i v),(Q-v),(R-i i i),(S-i i)$
(c) $(P-i),(Q-i v),(R-i i),(S-i i i)$
(d) $(P-v),(Q-i i i),(R-i),(S-i v)$
Answer:
(a) ( $P-iii),(Q-iv),(R-i),(S-ii)$
Question 7.
Matrix of bone and cartilage can be distinguished by the presence of -
(a) Lacunae
(b) Chromatophares
(c) Haversian canals
(d) Adipose cells
Answer:
(c) Haversian canals
Question 8.
Which type of tissue forms glands?
(a) Epithelial
(b) Muscular
(c) Nervous
(d) Connective
Answer:
(a) Epithelial
Question 9.
Which of the following blood cells help in blood coagulation?
(a) $\mathrm{RBCs}$
(b) Lymphocytes
(c) Thrombocytes
(d) Basophils

Answer:
(c) Thrombocytes
Question 10.
Fibroblasts macrophages and mast cells are present in -
(a) Cartilage tissue
(b) Areolar tissue
(c) Adipose tissue
(d) Glandular epithelium
Answer:
(b) Areolar tissue
Question 11.
Which type of epithelium is involved in a function to move particles or mucus in specific direction?
(a) Squamous epithelium
(b) Cuboidal epithelium
(c) Columnar epithelium
(d) Ciliated epithelium
Answer:
(d) Ciliated epithelium
Question 12.
Which of these is not found in connective tissue? 
(a) Collagen fibres
(b) Basement membrane
(c) Hyaluronic acid
(d) Fluid
Answer:
(b) Basement membrane
Question 13.
Multi-lobed nucleus and granular cytoplasm are characteristics of which of the WBCs?
(a) Neutrophils
(b) Monocytes

(c) Lymphocytes
(d) Eosinophils
Answer:
(a) Neutrophils
Question 14.
Which one of the following plasma proteins is involved in the coagulation of blood? 
(a) globulin
(b) Fibrinogen
(c) albumin
(d) Serum amylase
Answer:
(b) Fibrinogen
Question 15.
Which of the following is not a connective tissue?
(a) Blood
(b) bone
(c) Lymph
(d) Nerve
Answer:
(d) Nerve
Question 16.
The ciliated columnar epithelial cells in humans are known to occur in -
(a) Bile duct and oesophagus
(b) Fallopian tubes and urethra
(c) Eustachian tube and stomach lining
(d) Bronchioles and fallopian tubes
Answer:
(d) Bronchioles and fallopian tubes