Tissues Test

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Tissues Test - 44

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Weekly Quiz Competition

Question 1
1 / -0

The surface of the skin, that is heavily used becomes thicker and tougher, and is full of durable ........... protein.

A
Eledin

B
Keratohyalin

C
Keratin

D
Albumin

Solution

Keratin is a fibrous protein. It helps in the formation of the structure of several vital organs. It forms the outer layer of human skin. It is also the key structural component of hair and nails. Keratin filaments are tough and form strong unmineralized tissues found in reptiles, birds, amphibians, and mammals.
So, the correct answer is option C.
Question 2
1 / -0

The key buffer-pair in human blood is

A
Na$$^+$$and Cl$$^-$$

B
Carbon and oxygen

C
H$$_2$$ and O$$_2$$

D
Carbonic acid and bicarbonate ions

Solution

Buffers are important to maintain a constant pH and transportation of gases in the blood.
The bicarbonate buffering system is an important buffer system in the acid-base homeostasis of living things, including humans. As a buffer, it tends to maintain a relatively constant plasma pH and counteract any force that would alter the pH. In this system, carbon dioxide (CO$$_2$$) combines with water (H$$_2$$O) to form carbonic acid (H$$_2$$CO$$_3$$), which in turn rapidly dissociates to form hydrogen ions (H+) and bicarbonate (HCO$$^{3-}$$).
Question 3
1 / -0

A teacher focussed the slide under a compound microscope. Which student identified it correctly?

A
Sheela identified it as cheek cells.

B
Madhu identified it as squamous epithelium.

C
Balaji identified it as parenchyma.

D
Shanti identified it as onion peel.
Solution
Given cells are polygonal in shape, tightly packed and possess centrally located nucleus.
1. Cheek cells are loosely packed and secrete mucus. Hence, option A is incorrect.
2. Parenchyma cells are loosely packed cells with large intercellular spaces. Hence, option C is incorrect.
3. Onion peel cells possess a cell wall, large vacuole, and nucleus located at the periphery. Hence, option D is incorrect.
4. Squamous epithelium cells are tightly packed, flat, polygonal cells. Animal cells possess a centrally located nucleus. Therefore, option B is correct.
Question 4
1 / -0

Which of the following is characteristic feature of the striated muscle?

A
It has repeating sarcomeres

B
They are spindle shaped

C
It has intercalated disc

D
None of these

Solution

Spindle-shaped cells are present in smooth muscles.
Heart muscles or cardiac muscles contain intercalated discs.
Muscle cells are composed of muscle fibers or myocytes. These muscle fibers are in turn composed of many chains of myofibrils. Myofibril consists of long proteins like actin, myosin and titin and other accessory proteins. All these proteins are organized into thin and thick filaments, which repeat along the length of the myofibril. The sarcomere is contractile unit of striated muscle. It is present in between two Z lines.
option A is correct
Question 5
1 / -0

In peripheral nervous system, the nerve fibers are made up exclusively of:

A
Dendrons

B
Axons

C
Nodes of Ranvier

D
Nissl body

Solution

Nerves are made up of bundles of the axons of nerve cells. A nerve is an enclosed, cable-like bundle of axons (long, slender projections of neurons) in the peripheral nervous system.
Hence, the correct option is B.
Question 6
1 / -0

Name the tissue that connects muscle to bones.

A
Tendon

B
Ligament

C
Cartilage

D
All of the above
Solution
- A tendon is a tough band of fibrous connective tissue that usually connects muscle to bone and is capable of withstanding tension.
- Ligaments join one bone to another bone.
- Cartilage is a flexible connective tissue in animals, including the joints between bones, the rib cage, the ear, the nose, the bronchial tubes and the intervertebral discs.
- It is not as hard and rigid as bone, but it is stiffer and less flexible than muscle.
Therefore, the correct answer is option A.
Question 7
1 / -0

Which of the following statements are wrong?
(a) Leucocytes disintegrate in the spleen and liver.
(b) RBC, WBC and blood platelets are produced by bone marrow.
(c) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(d) The important function of lymphocytes is to produce antibodies.

A
a and b only

B
a and d only

C
a and c only

D
b and c only

E
b and d only

Solution

Leucocytes do not disintegrate in spleen and liver.
They are formed in the bone marrow.
Neutrophils are mainly responsible for protection against infection.
When they come across the bacteria or any other foreign bodies, they engulf them through phagocytosis, thus playing a important role in cell defense.
Hence the correct option is C.
Question 8
1 / -0

The external protective tissues of plants are

A
Epidermis

B
Xylem

C
Pericycle

D
None of the above

Solution

The epidermis is a single-layered group of cells that covers plants leaves, flowers, roots and stems. It forms a boundary between the plant and the external environment. The epidermis serves several functions- it protects against water loss, regulates gas exchange, secretes metabolic compounds, and in roots absorbs water and mineral nutrients.
So, the correct answer is option A.
Question 9
1 / -0

Find the odd one out.

A
Epiblema

B
Muscle fibre

C
Nerve fibre

D
Skin
Solution
Correct Option: A
Explanation:
- Epiblema is a distinct epidermal cell located in rootlets of plants.
- It is the outer part of most of the root hairs in the cells.
- Muscle fibre, nerve fibre and skin are present in animals.
- Since epiblema is the only one that is present in plants, it is the odd one out.
Hence, the odd one out is: Epiblema.
Question 10
1 / -0

Inner lining of blood vessel is composed of

A
Pseudostratified epithelium

B
Simple cuboidal epithelium

C
Simple squamous epithelium

D
Ciliated columnar epithelium

Solution

Simple squamous epithelial cells are thin and flat cells having a large surface area that is exposed to the lumen on one side and to the basement membrane on the other side. The cells are scale-like in appearance. They tend to have larger, elliptically-shaped nuclei. As a simple type of epithelium, the simple squamous epithelium is one cell-layer thick and thus every cell of the tissue comes in direct contact with the basement membrane. The endothelium is a type of epithelium that lines the interior surface of blood vessels and lymphatic vessels. It is a thin layer of simple squamous cells called endothelial cells.
Hence the correct option is C.

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Re-Attempt Weekly Quiz Competition

Tissues Test - 44

Result

Tissues Test - 44

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Rank

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SHARING IS CARING

Question 1

Eledin

Keratohyalin

Keratin

Albumin

Solution

Question 2

Na$$^+$$and Cl$$^-$$

Carbon and oxygen

H$$_2$$ and O$$_2$$

Carbonic acid and bicarbonate ions

Solution

Question 3

Sheela identified it as cheek cells.

Madhu identified it as squamous epithelium.

Balaji identified it as parenchyma.

Shanti identified it as onion peel.

Solution

Question 4

It has repeating sarcomeres

They are spindle shaped

It has intercalated disc

None of these

Solution

Question 5

Dendrons

Axons

Nodes of Ranvier

Nissl body

Solution

Question 6

Tendon

Ligament

Cartilage

All of the above

Solution

Question 7

a and b only

a and d only

a and c only

b and c only

b and d only

Solution

Question 8

Epidermis

Xylem

Pericycle

None of the above

Solution

Question 9

Epiblema

Muscle fibre

Nerve fibre

Skin

Solution

Question 10

Pseudostratified epithelium

Simple cuboidal epithelium

Simple squamous epithelium

Ciliated columnar epithelium

Solution

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