Tissues Test

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Tissues Test - 97

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Weekly Quiz Competition

Question 1
1 / -0

Haversian canal in the bone of mammals are connected by small blood vessel canal called:

A
Schlemm's canal

B
Volkmann's canal

C
Portal capillaries

D
Sinuses

Solution

Haversian canals are characteristically present in mammalian bones, they are the longitudinal canals that run parallel to each other. Each of them contains a nerve, an artery, a vein and a lymph vessel. The Haversian canals are interconnected by transverse channels called Volkmann's canal. These are the small channels in the bone that transmit blood vessels from the periosteum into the bone and that communicate with the Haversian canals. The perforating canals provide energy with an nourishing elements for osteons.
So, the correct answer is 'Volkmann's canal'
Question 2
1 / -0

The process of bone formation is known as

A
Ossification

B
Calcification

C
Calcination

D
None of the above

Solution

A) Ossification is the natural process of formation of bone. Bones are formed by the cells called osteoblasts.
B) Calcification is the process of accumulation of calcium ions in body tissue.
C) Calcination is the process in which heating is done under high temperature
in the presence of air.
So, the correct answer is 'Ossification'.
Question 3
1 / -0

Which of the following is the characteristic feature of cardiac muscles?

A
Cylindrical, branched and uninucleate

B
Long, pointed and uninucleate

C
Long, cylindrical and unbranched

D
Cylindrical, unbranched and multinucleate

Solution

Cardiac muscles are involuntary muscles in the heart. It has certain peculiar characteristics like they are cylindrical in shape. They are branched and have striations . They are generally uninucleate.
So, the correct answer is option A.
Question 4
1 / -0

A typical neuron has a myelin sheath insulating its axon. It is formed from cells known as Schwann cells. Some nervous system disorders, such as adrenoleukodystrophy result from the deterioration of the myelin sheath.
Why is the myelin sheath important to the correct functioning of the neuron?

A
The surface of the myelin sheath carries many receptors for neurotransmitters, allowing the neuron to receive chemical signals

B
Gaps in the myelin sheath allow for saltatory conduction, where electrical impulses jump from one covered area to another

C
The myelin sheath blocks external signals that originate outside the neuron, preventing interference with nervous signal transmission

D
None of these

Solution

Schwann cells that constitute the myelin sheath, are lipid-rich cells that create a biological insulation over axon and do not allow the free flow of electrical impulses through it. The myelin sheath is discontinuous and the gaps are called nodes of Ranvier. This gap has no insulation and thus allow the electrical impulses to pass through and allow saltatory conduction. So electrical impulses jump from one covered area to another.
So the correct answer is B.
Question 5
1 / -0

Which of these are granulocytes?

A
Neutrophils, basophils, lymphocytes

B
Eosinophils, basophils, monocytes

C
Basophils, monocytes, lymphocytes

D
Neutrophils, eosinophils, basophils
Solution
A.Correct option -D
B.Explanation for correct option
WBCs (White blood cells) can be granulocytes or agranulocytes.
Granulocytes are of three types:
Eosinophils: These cells play important role in immunity and allergic reactions. These make about 1 - 5% of total leucocytes.
Basophils: These cells contain heparin, serotonin and histamine. These make about 0.5 - 2.7% of total leucocytes.
Neutrophils: These cells perform phagocytosis and also destroy bacteria. These make about 60 - 70% of total leucocytes.
Agranulocytes are of two types:
Lymphocytes: These cells are of two types, B lymphocytes that maintain humoral immunity and T lymphocytes which maintain cell-mediated immunity. These make about 20 - 40% of total leucocytes.
Monocytes: These cells are actively motile and phagocytic cells. These make about 2 - 7% of total leucocytes.
Question 6
1 / -0

Oxygen and carbon dioxide are transported in blood through.

A
Platelets and corpuscles

B
RBCs and WBCs

C
WBCs and Serum

D
RBCs and plasma
Solution
Oxygen transport is done exclusively by RBCs in the form of oxyhemoglobin. Carbon dioxide transport may be by 3 ways:
Dissolved in plasma (7%)
In the form of carbaminohemoglobin (23%)
As bicarbonates(70%)
Hence the correct option is D.
Question 7
1 / -0

Matrix composed of calcium and phosphate is present in __________.

A
Cartilage

B
Bone

C
Ligament

D
Tendon

Solution

Bone is a strong and nonflexible connective tissue that supports the body and anchors the muscles. Bone cells are embedded in a hard matrix that is composed of calcium and phosphorus compounds.
So, the correct option is option B.
Question 8
1 / -0

Read the statement regarding myofibril and choose the correct option:
1. Each myofibril has alternate dark and light bands.
2. In the center of each A band is an elastic fiber called Z-line.
3. A and I bands are arranged alternately throughout the length of myofibril.
4. The sarcomere is the functional unit of contraction.
5. The central part of thick filament not overlapped by a thin filament is the M line.

A
1, 3 and 5 alone are correct

B
2 and 5 alone are correct

C
2 and 3 alone are correct

D
1, 3 and 4 alone are correct.

E
1, 3 and 2 alone are correct.
Solution
1. Each myofibril has alternate light and dark bands due to the presence of contractile proteins actin and myosin.
2. Z line is present in the center of each I band but not A band. So, this option is incorrect.
3. As shown in the diagram, A and I bands are arranged alternatively throughout the length of the myofibril.
4. The functional unit of muscle contraction is the sarcomere which shortens and lengthens during muscle contraction and relaxation.
5. The central part of the thick filament which is not overlapped by the thin filament is H zone and not the M line (Refer Diagram).
So, the correct option is '1, 3 and 4 alone are correct'.
Question 9
1 / -0

Number of erthyrocytes formed per hour is

A
$$1\ million$$

B
$$10\ billion$$

C
$$100\ million$$

D
$$100\ billion$$

Solution

Erythrocytes are red blood cell containing hemoglobin, which imparts the red colour to blood. It transport oxygen and carbon dioxide in the tissues. In healthy adults, it is estimated that 100 billion red blood cells and 400 million white cells are produced each hour, i.e, 1 lakh million red blood cells are produced in one hour.
So, the correct answer is D.
Question 10
1 / -0

Rhythmical contraction is noticed in

A
Cardiac muscles

B
Striped muscles

C
Unstriped muscles

D
In all the muscles

Solution

Cardiac muscles are present in the wall of the heart. They are involuntary in nature. They show rhythmic contraction to regulate the heartbeat.
So, the correct answer is 'Cardiac muscles'.

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Tissues Test - 97

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Tissues Test - 97

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Question 1

Schlemm's canal

Volkmann's canal

Portal capillaries

Sinuses

Solution

Question 2

Ossification

Calcification

Calcination

None of the above

Solution

Question 3

Cylindrical, branched and uninucleate

Long, pointed and uninucleate

Long, cylindrical and unbranched

Cylindrical, unbranched and multinucleate

Solution

Question 4

The surface of the myelin sheath carries many receptors for neurotransmitters, allowing the neuron to receive chemical signals

Gaps in the myelin sheath allow for saltatory conduction, where electrical impulses jump from one covered area to another

The myelin sheath blocks external signals that originate outside the neuron, preventing interference with nervous signal transmission

None of these

Solution

Question 5

Neutrophils, basophils, lymphocytes

Eosinophils, basophils, monocytes

Basophils, monocytes, lymphocytes

Neutrophils, eosinophils, basophils

Solution

Question 6

Platelets and corpuscles

RBCs and WBCs

WBCs and Serum

RBCs and plasma

Solution

Question 7

Cartilage

Bone

Ligament

Tendon

Solution

Question 8

1, 3 and 5 alone are correct

2 and 5 alone are correct

2 and 3 alone are correct

1, 3 and 4 alone are correct.

1, 3 and 2 alone are correct.

Solution

Question 9

$$1\ million$$

$$10\ billion$$

$$100\ million$$

$$100\ billion$$

Solution

Question 10

Cardiac muscles

Striped muscles

Unstriped muscles

In all the muscles

Solution

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