Tissues Test

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Tissues Test - 96

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Weekly Quiz Competition

Question 1
1 / -0

Which are the phagocytic cells from given diagram?

A
I and V

B
I and III

C
I and IV

D
I and II

Solution

Figure I represents macrophages and figure V represents neutrophils, both of which are the phagocytic cells of body. Macrophages are precursors of monocytes, a type of agranulocytes and neutrophils are granulocytes with multilobed nuclei. Figures II, III and IV represent lymphocyte, eosinophil and basophil respectively which do not perform phagocytosis.
Hence the correct option is A.
Question 2
1 / -0

The correct representation of the given alphabets is

A
A- muscle; B- tendon; C- ligament; D- ulna

B
A- ligament; B- muscle; C- radius; D- tendon

C
A- ligament; B- muscle; C- tendon; D- radius

D
A- tendon; B- muscle; C- ligament; D- radius

E
A- tendon; B- muscle; C- ligament; D- ulna

Solution

Tendon (A) attaches muscle to bone. Muscles (B) are responsible for the movement of the body parts by contraction. Ligament (C) connect 2 bones and prevents excessive movement between bones. Ulna (D) is one of the bones of the forearm. Bone is a hard connective tissue. Thus, the correct answer is option E.
Question 3
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The generation of excitation-contraction coupling involves all the following events except

A
Generation of end-plate potential

B
Release of calcium from troponin

C
Formation of cross-linkages between actin and myosin

D
Hydrolysis of ATP to ADP

Solution

Excitation-contraction coupling is a process that relates to the electrical excitation through generation of force and contraction in the skeletal muscles. The central process that brings about the excitation-contraction is calcium mobilization. The process involves inward flux of extracellular calcium ions through L-type calcium channels, calcium induced calcium release through sacroplasmic reticulum, with the increase in concentration of intracellular calcium, the calcium ions get bound to protein troponin and myosin binds to actin.
Hence B is the correct option.
Question 4
1 / -0

A blood cell is moved from an isotonic solution to a hypertonic solution. Select the correct condition.

A
The cell would swell.

B
The cell would shrivel up.

C
The cell would immediately lyse.

D
The cell membrane would be reinforced.

E
Nothing, the cell would be in equilibrium.

Solution

A blood cell placed in hypertonic solution would loose water as water will move from cell to surrounding hypertonic medium by the process of osmosis causing the cell to shrivel up. If the cell was placed in hypotonic solution, water would enter the cell causing it to swell and reinforcement of cell membrane followed by its lysis. The correct answer is B.
Question 5
1 / -0

Choose the correct sequence of heart structures that blood would pass through when traveling from the right atrium to the lungs and then to the left ventricle.

A
3, 2, 4, 5, 7

B
6, 2, 1, 4, 5

C
3, 2, 1, 5, 7

D
6, 2, 3, 4, 5

E
6, 2, 4, 5, 7

Solution

The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice.
The vena cava carries the deoxygenated blood from the body to the right atrium.
From the right atrium, blood enters the right ventricle (6) which in turn pumps the blood into the pulmonary arteries (2).
The pulmonary arteries carry deoxygenated blood to the lungs for oxygenation.
Two pulmonary veins (4) from each lung bring oxygen-rich blood to the left atrium (5) which then enters the left ventricle.
The left ventricle (7) pumps oxygenated blood into the aorta which in turn branches and delivers blood to the rest of the body and organs.
Therefore, the correct answer is option E.
Question 6
1 / -0

In voluntary muscle movement, which of the following process occurs only if ATP is present?

A
Myosin to bind to actin

B
Myosin becoming separated from actin

C
Tropomyosin to bind to troponin

D
Tropomyosin to become separated from troponin

E
Tropomyosin to become separated from actin

Solution

The contraction of voluntary muscles requires a nervous impulse which is transferred from the neuron to the sarcolemma of the muscle cell. As impulse travels through the sarcoplasmic reticulum, the calcium is diffused into the myofilaments filling and exposing the actin binding sites. ATP is a critical factor that helps to prepare Myosin for binding as well as for recharging the myosin. The binding of ATP to a myosin head detaches myosin from actin.
Thus, the correct answer is option B.
Question 7
1 / -0

In terms of descending order of percentage proportions of leucocytes in human blood, which one is correct?

A
Neutrophils $$\rightarrow$$ lymphocytes $$\rightarrow$$ monocytes $$\rightarrow$$ acidophils $$\rightarrow$$ basophils

B
Neutrophils $$\rightarrow$$ basophils $$\rightarrow$$ lymphocytes $$\rightarrow$$ acidophils $$\rightarrow$$ monocytes

C
Neutrophils $$\rightarrow$$ monocytes $$\rightarrow$$ lymphocytes $$\rightarrow$$ acidophils $$\rightarrow$$ basophils

D
Neutrophils $$\rightarrow$$ acidophils $$\rightarrow$$ basophils $$\rightarrow$$ lymphocytes $$\rightarrow$$ monocytes

Solution

Neutrophils are the most abundant white blood cell, constituting 60-70% of the circulating leukocytes.
Lymphocytes are much more common in the lymphatic system than in blood. Lymphocytes are distinguished by having a deeply staining nucleus that may be eccentric in location, and a relatively small amount of cytoplasm, constituting 30% of the leucocytes.
Monocytes, the largest type of WBCs. They are 5.3% of the total leucocytes.
Eosinophils / acidophils compose about 2-4% of the WBC total.
Basophils are chiefly responsible for allergic and antigen response by releasing the chemical histamine causing the dilation of blood vessels. Because they are the rarest of the white blood cells (less than 0.5% of the total count) and share physicochemical properties with other blood cells, they are difficult to study.
Hence the correct option is A.
Question 8
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Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per $${mm}^{3}$$ of human blood?

A
Eosinophils --> Basophils --> Neutrophils

B
Basophils --> Eosinophils --> Neutrophils

C
Neutrophils --> Eosinophils --> Basophils

D
Eosinophils --> Neutrophils --> Basophils

Solution

Percentage distribution of leukocyte are as follows:
Neutrophils- 60 - 70%
Lymphocytes- 20 - 30%
Monocytes- 2 - 8%
Eosinophils- 1 - 4%
Basophils- 0.5 - 1%
Thus, the correct answer is option C.
Question 9
1 / -0

Directions For Questions

In order to explore the effect of different environments on blood flow, a small fresh water fish is used. For the experiment, a fish with a wet cotton ball over its gills is placed in each petri dish for the diffusion of oxygen which keeps the fish alive. The thinnest part of the tail is then viewed under the objective lens of a light microscope to see the flow of blood in blood vessels. The number of red blood cells flowing through the vessel is counted at a 5-second interval. After monitoring the normal flow of blood for 30 seconds, the environment in the petri dish is altered in one of five different ways. Students observe and record the change in blood flow if any. After the experiment, each fish is returned to the fish tank.
Experiment 1: Nothing is added to this petri dish.
Experiment 2: Water at a temperature of $$5^0$$ is added
Experiment 3: Water at a temperature of $$30^0$$ C is added.
Experiment 4: Ethyl alcohol is added.
Experiment 5: Nicotine extracted from cigarette tobacco is added.

...view full instructions

The graph that best describes the experiment 4 is

A

B

C

D

E

Solution

Ethyl alcohol was added after monitoring the normal flow of blood for 30 seconds. For initial 30 seconds, the average rate of blood flow was 9 which was then lowered down to 5 due to addition of ethyl alcohol. The blood flow was slowed down after addition of ethyl alcohol while these options show increased speed of blood flow after 30 sec. Thus, the correct answer is A.
Question 10
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Haemoglobin levels in the blood samples of two persons A and B are found to be 9 gm/dL and 13 gm/dL respectively. Which statement is true with respect to the amount of oxygen supply in their body?

A
More in person B than in person A

B
More in person A than in person B

C
Equal in person A and person B

D
No correlation between oxygen supply and the level of haemoglobin
Solution
- Haemoglobin is a protein that is present in the red blood cells. The protein can bind to oxygen and help in the transport of oxygen.
- The amount of haemoglobin specifies the amount of oxygen that can be supplied by the blood cells to the tissues in the body.
- The level of hemoglobin in person A is less than the level in person B.
- So, there will be more amount of oxygen transported in person B compared to person A.
Thus, the correct answer is option A.