Histology And Molecular Biology
(9).webp "Histology And Molecular Biology - Quiz")
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Questions and Answers
- 1.
Corse adjustment knob
- A.
Moves the stage up/down a little distance
- B.
Flat plat form to place the slides
- C.
Moves the stage up/down a great distance
- D.
It supports the tube
Correct Answer
C. Moves the stage up/down a great distanceExplanation
The corse adjustment knob moves the stage up/down a great distance. This suggests that the knob is used for making large adjustments to the position of the stage. It is likely that the stage refers to the platform on which slides or samples are placed for observation under a microscope. By turning the corse adjustment knob, the stage can be moved vertically to bring the desired area into focus.Rate this question:
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- 2.
The highest total magnification of the light microscope is
- A.
1000
- B.
100
- C.
400
- D.
10000
Correct Answer
A. 1000Explanation
The highest total magnification of the light microscope is 1000. This means that the microscope can magnify an object up to 1000 times its original size. This level of magnification allows for detailed observation of small structures and cells.Rate this question:
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- 3.
Which of the followings is not acidophilic
- A.
Proteins
- B.
Glycosaminoglycan
- C.
Mitochondria
- D.
Collagen fibers
Correct Answer
B. GlycosaminoglycanExplanation
Glycosaminoglycan is not acidophilic because it is a type of carbohydrate molecule that is negatively charged and attracts water, making it hydrophilic. Acidophilic substances, on the other hand, have an affinity for acidic environments. Mitochondria, collagen fibers, and proteins can all be found in acidic environments and therefore can be considered acidophilic.Rate this question:
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- 4.
Which of the followings is incorrect
- A.
Before using the bright-field microscope certain irradiated substances must be added
- B.
The electron microscope has a resolving power around 3nm
- C.
Diamidinophenylindole binds to DNA
- D.
SEM produces pseudo-3Dinage
Correct Answer
A. Before using the bright-field microscope certain irradiated substances must be addedExplanation
The statement "before using the bright-field microscope certain irradiated substances must be added" is incorrect because bright-field microscopy does not require the addition of irradiated substances. Bright-field microscopy is a basic form of light microscopy where light passes through the sample without any additional staining or labeling. It is commonly used for observing live or fixed unstained specimens.Rate this question:
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- 5.
Immunocytochemistry is:
- A.
Breakage in tissues due to immune system
- B.
Tagged antibodies
- C.
Taking up radioactive substances by tissues and detecting the radiation by a silver bromide
- D.
Markers added to the tissues which convert the reaction product into in soluble and visible substanses
- E.
No answer is correct
Correct Answer
B. Tagged antibodiesExplanation
Immunocytochemistry is a technique used to detect specific proteins or antigens in cells or tissues. It involves the use of antibodies that are labeled or "tagged" with a detectable marker, such as a fluorescent dye or enzyme. These tagged antibodies bind to the target antigen, allowing for its visualization and localization within the cells or tissues. This technique is commonly used in research and diagnostic laboratories to study the distribution and expression of specific proteins in biological samples.Rate this question:
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- 6.
Which of the following tissues have intertwining elongated process
- A.
Epithelial
- B.
Nervous
- C.
Muscular
- D.
Connective
Correct Answer
B. NervousExplanation
The correct answer is nervous because nervous tissue is composed of specialized cells called neurons that have long, intertwining processes called axons and dendrites. These processes allow neurons to transmit electrical signals and communicate with other cells in the body. Epithelial tissue is composed of tightly packed cells that line the surfaces of organs and body cavities. Muscular tissue is composed of cells called muscle fibers that contract to produce movement. Connective tissue is characterized by an extracellular matrix that supports and connects different tissues and organs in the body.Rate this question:
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- 7.
The epithelial tissues :
- A.
Their sheets cells' are closely packed
- B.
It doesn't turn over trough the humans life
- C.
They are vascular
- D.
the basal lamina is formed of glycosaminoglycan collagen fibers and proteoglycan
- E.
A+D
Correct Answer
A. Their sheets cells' are closely packedExplanation
Epithelial tissues are characterized by their closely packed cells, which form continuous sheets. This arrangement allows them to provide a protective barrier and regulate the exchange of substances between different body compartments. Unlike other tissues, epithelial tissues do not undergo turnover throughout a human's life. Additionally, epithelial tissues are avascular, meaning they lack blood vessels. The basal lamina, a specialized extracellular matrix, is composed of glycosaminoglycan, collagen fibers, and proteoglycan, providing structural support to the epithelial cells. Therefore, the correct answer is that epithelial tissues have closely packed cells.Rate this question:
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- 8.
One of the followings is not a function of basal lamina
- A.
Providing a structural support
- B.
Help filtering substances
- C.
Helps in repair in nerve fiber
- D.
Effect the proliferation
- E.
None of them is the answer
Correct Answer
E. None of them is the answerExplanation
The basal lamina serves multiple functions in the body. It provides structural support by acting as a scaffold for cells and tissues. It also helps in filtering substances, allowing only certain molecules to pass through. Additionally, it plays a role in the repair of nerve fibers. Lastly, it can affect cell proliferation, influencing the growth and division of cells. Therefore, none of the given options is correct as all of them are functions of the basal lamina.Rate this question:
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- 9.
Which of the following is incorrect
- A.
The stomach tissues is an example on the lining epithelial cells
- B.
The glandular cells may present between cells of lining epithelium
- C.
The simple squamous epithelium tissues may be keratinized or non-keratinized
- D.
The transitional epithelium is a type of stratified epithelium
Correct Answer
C. The simple squamous epithelium tissues may be keratinized or non-keratinizedExplanation
The simple squamous epithelium tissues may be keratinized or non-keratinized.Rate this question:
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- 10.
Which of the followings do not match
- A.
Simple cuboidal epithelium >>> found in>>>>ovary
- B.
Uterine tubes tissues >>> non ciliated simple columnar epithelium
- C.
Stratified squamous epithelium (keratinized)>>>protection and secretion
- D.
Esophagus >>>non keratinized stratified squamous epithelium
- E.
Two of the above
Correct Answer
E. Two of the aboveExplanation
The correct answer is "two of the above." This means that two of the statements mentioned in the question do not match. However, without the complete question, it is not possible to determine which specific statements are incorrect. Therefore, an explanation cannot be provided.Rate this question:
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- 11.
The main function of the keratinized stratified squamous epithelium
- A.
Secretion
- B.
Prevent water lost
- C.
Covering organs
- D.
Filtering of substances
- E.
No answer is correct
Correct Answer
B. Prevent water lostExplanation
The main function of keratinized stratified squamous epithelium is to prevent water loss. This type of epithelium is found in the skin and acts as a protective barrier against dehydration by preventing water from evaporating from the body's surface. It does this through the presence of keratin, a protein that makes the epithelium tough and waterproof. This function is crucial in maintaining the body's hydration levels and protecting it from external factors such as dry environments.Rate this question:
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- 12.
Conjunctiva is formed by :
- A.
Stratified cuboidal epithelium
- B.
Stratified columnar epithelium
- C.
Transitional epithelium
- D.
Simple squamous epithelium
Correct Answer
B. Stratified columnar epitheliumExplanation
The conjunctiva is a thin, transparent membrane that covers the front surface of the eye and lines the inside of the eyelids. It helps protect the eye from foreign objects and provides lubrication. The conjunctiva is composed of stratified columnar epithelium, which is a type of epithelial tissue that consists of multiple layers of cells with columnar shape. This type of epithelium is well-suited for providing protection and secretion, making it ideal for the conjunctiva's role in maintaining eye health.Rate this question:
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- 13.
An example on pseudostratified columnar ciliated
- A.
Epidermis
- B.
Brounchi
- C.
Uterine tubes
- D.
Mouth
- E.
Vagina
- F.
More than one answer is correct
Correct Answer
B. BrounchiExplanation
Pseudostratified columnar ciliated epithelium is a type of tissue found in the respiratory tract, including the bronchi. This tissue is characterized by its columnar shape and the presence of cilia on its surface. It helps to move mucus and trapped particles out of the respiratory tract. Therefore, the correct answer is bronchi as it is a location where pseudostratified columnar ciliated epithelium is found.Rate this question:
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- 14.
Which of the the followings is incorrect
- A.
Endocrine cells lack ducts
- B.
The simple columnar epithelium may be ciliated
- C.
"sweat glands" is an example on unicellular glands
- D.
If the tube of secretory portion is spiral shape it's called Acinar
- E.
There is more than one answer :P :P
Correct Answer
E. There is more than one answer :P :P -
- 15.
An example on the apocrine exocrine glands :
- A.
Sebaceous glands
- B.
Mammary glands
- C.
Salivary glands
- D.
Sweat glands
Correct Answer
B. Mammary glandsExplanation
Mammary glands are an example of apocrine exocrine glands. These glands are responsible for producing and secreting milk in female mammals. During lactation, mammary glands undergo changes in their structure and function to produce and release milk for the nourishment of offspring. The secretion of milk is regulated by hormones such as prolactin and oxytocin. This process is unique to mammary glands and is essential for the survival and growth of newborn mammals.Rate this question:
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- 16.
Myoepithelial calls are :
- A.
located under the basal lamina
- B.
Contain contractile elements
- C.
Pyramidal shaped
- D.
In histological preparation they appear vacant
Correct Answer
B. Contain contractile elementsExplanation
Myoepithelial cells are a type of specialized cells found in various tissues, including the salivary glands and mammary glands. These cells are located under the basal lamina, which is a layer of extracellular matrix that separates the epithelium from the underlying connective tissue. Myoepithelial cells have contractile elements, such as actin and myosin, which allow them to contract and help in the movement of substances through the ducts of the glands. In histological preparations, myoepithelial cells appear vacant because they are usually flattened against the basal lamina and do not contain much cytoplasm.Rate this question:
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- 17.
If there was a cell producing collagen (protein) that mean it will have all these features instead:
- A.
Rich in RER
- B.
Pale nucleus
- C.
Small amount of cytoplasm
- D.
Large nucleus
Correct Answer
C. Small amount of cytoplasmExplanation
The correct answer is "small amount of cytoplasm." Collagen production requires a significant amount of rough endoplasmic reticulum (RER) for protein synthesis. As a result, the cell will be rich in RER. The nucleus of a collagen-producing cell will be pale due to the extensive RER and protein production. However, collagen synthesis does not require a large amount of cytoplasm, so the cell will have a small amount of cytoplasm. The size of the nucleus is not specified in relation to collagen production.Rate this question:
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- 18.
Luekocyte are cells that:
- A.
Orginate and remain in CT all their lives
- B.
Orginate outside the CT and then come to CT for their long live
- C.
Orginate outside the CT and then come to CT for short period
Correct Answer
C. Orginate outside the CT and then come to CT for short period -
- 19.
Neutrophils and macrophages are cells that:
- A.
Avoid allergic
- B.
Make phagocyte process
- C.
Produce antibodies
- D.
None of the above
Correct Answer
B. Make phagocyte processExplanation
Neutrophils and macrophages are cells that perform the phagocytosis process, which involves engulfing and destroying pathogens, foreign particles, and cellular debris. This is an essential function of these cells in the immune response to infections and inflammation. They are not involved in avoiding allergic reactions or producing antibodies, making the option "make phagocyte process" the correct answer.Rate this question:
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- 20.
Hemoglobin of RBC carry:
- A.
NO, CO2, O2
- B.
NO, H2O, CO2
- C.
O2, HCO3, CO2
Correct Answer
A. NO, CO2, O2Explanation
Hemoglobin in red blood cells carries oxygen (O2), carbon dioxide (CO2), and nitric oxide (NO). Nitric oxide helps regulate blood flow and blood pressure by dilating blood vessels. Carbon dioxide is produced as a waste product in cells and is transported back to the lungs to be exhaled. Oxygen is carried by hemoglobin from the lungs to the body's tissues for cellular respiration. Therefore, the correct answer is NO, CO2, O2.Rate this question:
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- 21.
All of these are true about dense connective tissue except:
- A.
There is regular and irregular
- B.
Numerous collagen fibers
- C.
Found in tendons
- D.
Found in the space between muscles and nerve
Correct Answer
D. Found in the space between muscles and nerveExplanation
Dense connective tissue is characterized by its regular and irregular arrangement, as well as the presence of numerous collagen fibers. It is commonly found in tendons, which connect muscles to bones. However, dense connective tissue is not typically found in the space between muscles and nerves.Rate this question:
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- 22.
We can microphage in all of these tissues except:
- A.
Loose CT
- B.
Reticular CT
- C.
Dense CT
Correct Answer
C. Dense CTExplanation
Dense connective tissue is composed of tightly packed collagen fibers and has a low cellularity, making it difficult for phagocytic cells like macrophages to penetrate and function effectively. In contrast, loose connective tissue and reticular connective tissue have a more open and less dense arrangement of fibers, allowing for easier movement and infiltration of immune cells such as macrophages. Therefore, macrophages can be found in loose connective tissue and reticular connective tissue, but not in dense connective tissue.Rate this question:
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- 23.
Collagen is found in except:
- A.
Tendons and ligament
- B.
Hair and skin
- C.
Periodontal membrane
- D.
Vagina
Correct Answer
D. VaginaExplanation
Collagen is a protein that provides strength and structure to various tissues in the body. It is found in tendons, ligaments, hair, skin, and the periodontal membrane. However, it is not found in the vagina. The vagina is composed of different types of tissues, such as smooth muscle and epithelial cells, but collagen is not a major component of its structure.Rate this question:
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- 24.
All are RBC features except;
- A.
Biconcave
- B.
Flex membrane
- C.
Found in all fluids
- D.
Renew every 4 months
Correct Answer
C. Found in all fluidsExplanation
The feature "found in all fluids" is not a characteristic of red blood cells (RBCs). RBCs are found primarily in the blood and are responsible for carrying oxygen to different parts of the body. They do not exist in other fluids such as urine, saliva, or cerebrospinal fluid. The other options, biconcave (referring to the shape of RBCs), flexible membrane (allowing them to squeeze through narrow capillaries), and renew every 4 months (RBCs have a lifespan of around 120 days) are all accurate features of RBCs.Rate this question:
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- 25.
All of these are match except:
- A.
Monocyte ---> cytoplasm is basophilic
- B.
Lymphocyte ----> nucleu is large and dark
- C.
Plasma cell --> phagocyte
- D.
Mast cell ---> central located nucleus
Correct Answer
C. Plasma cell --> phagocyteExplanation
The given options describe the characteristics of different types of cells. Monocytes are characterized by their basophilic cytoplasm, lymphocytes have large and dark nuclei, and mast cells have a centrally located nucleus. However, the statement that plasma cells are phagocytes is incorrect. Plasma cells are actually responsible for producing antibodies, not for phagocytosis. Therefore, the correct answer is plasma cell - phagocyte.Rate this question:
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- 26.
The collagen disease that cause teeth fall:
- A.
Osteogenesis imperfecta
- B.
Scurvy
- C.
Sclerosis
- D.
Keloid
Correct Answer
B. ScurvyExplanation
Scurvy is a collagen disease that can cause teeth to fall out. It is caused by a deficiency of vitamin C, which is necessary for the production of collagen, a protein that helps maintain the health of connective tissues, including teeth and gums. Without enough vitamin C, collagen production is impaired, leading to weakened gums and loose teeth. Therefore, scurvy is the correct answer as it directly relates to the given symptom of teeth falling out.Rate this question:
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- 27.
Which one of the next compound can convert into cyclic;
- A.
C2H4O2
- B.
C3H6O3
- C.
C4H8O4
- D.
C5H10O5
Correct Answer
D. C5H10O5Explanation
The compound C5H10O5 can convert into a cyclic compound because it has a sufficient number of carbon atoms and oxygen atoms to form a cyclic structure. The presence of five carbon atoms and five oxygen atoms allows for the formation of a cyclic ring structure, where each carbon atom is bonded to two neighboring carbon atoms and one oxygen atom. This cyclic structure is not possible with the other compounds listed, as they either have too few carbon and oxygen atoms or an incorrect ratio of carbon to oxygen atoms.Rate this question:
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- 28.
Both prokaryotic and eukaryotic cells have :
- A.
Mitochondria
- B.
Ribosomes
- C.
Nucleus
- D.
Golgi apparatus
Correct Answer
B. RibosomesExplanation
Both prokaryotic and eukaryotic cells have ribosomes. Ribosomes are cellular structures responsible for protein synthesis. They are present in both types of cells, although they may differ slightly in structure and function. In prokaryotic cells, ribosomes are smaller and free-floating in the cytoplasm, while in eukaryotic cells, they can be found both in the cytoplasm and attached to the endoplasmic reticulum. Ribosomes play a crucial role in translating genetic information from DNA into functional proteins, making them essential for cellular processes in both prokaryotic and eukaryotic organisms.Rate this question:
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- 29.
Simplest aldoses contain
- A.
1 carbon
- B.
2 carbons
- C.
3 carbons
- D.
4 carbons
Correct Answer
C. 3 carbonsExplanation
The simplest aldoses contain 3 carbons. This means that the aldose molecule consists of a chain of 3 carbon atoms, along with the necessary functional groups such as hydroxyl groups (-OH) and an aldehyde group (-CHO). Examples of aldoses with 3 carbons include glyceraldehyde and dihydroxyacetone.Rate this question:
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- 30.
There are .....chiral centre in glucose:
- A.
2
- B.
4
- C.
16
- D.
32
Correct Answer
B. 4Explanation
Glucose is a six-carbon sugar molecule with four chiral centers. A chiral center is a carbon atom that is bonded to four different groups. In glucose, there are four carbon atoms (C2, C3, C4, and C5) that have four different groups attached to them, making them chiral centers. Therefore, the correct answer is 4.Rate this question:
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- 31.
Enantiomers have the same next features except;
- A.
Physical properity
- B.
Chemical properity
- C.
Same ability to rotate a polarized light
- D.
Non of the above.
Correct Answer
C. Same ability to rotate a polarized lightExplanation
Enantiomers are mirror images of each other and have the same physical and chemical properties, except for their ability to rotate a polarized light. Enantiomers rotate the plane of polarization in equal but opposite directions due to their different spatial arrangement of atoms. This property is known as optical activity. Therefore, the correct answer is that enantiomers have the same physical and chemical properties, but they differ in their ability to rotate a polarized light.Rate this question:
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- 32.
In amino sugars OH group is replaced by NH2 af carbon number :
- A.
1
- B.
2
- C.
3
- D.
2,6
Correct Answer
B. 2Explanation
In amino sugars, the OH group is replaced by NH2 at carbon number 2. This means that the hydroxyl group (-OH) present in a regular sugar molecule is substituted with an amino group (-NH2) at the second carbon atom. This substitution of the group occurs specifically at carbon number 2 in amino sugars.Rate this question:
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- 33.
Milk sugar is :
- A.
Maltose
- B.
Sucrose
- C.
Lactose
Correct Answer
C. LactoseExplanation
Lactose is the correct answer because it is the sugar found in milk. It is a disaccharide composed of glucose and galactose. Maltose is a sugar found in grains and sucrose is a common table sugar found in fruits and vegetables. Therefore, lactose is the most appropriate answer in the context of milk sugar.Rate this question:
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- 34.
Cellulose is formed from:
- A.
A (1-4)glucose
- B.
B(1-4)glucose
- C.
A(1-2)glucose
- D.
Non of the above.
Correct Answer
B. B(1-4)glucoseExplanation
Cellulose is formed from b(1-4)glucose. This means that the glucose molecules are linked together through a beta-1,4-glycosidic bond. Cellulose is a polysaccharide made up of repeating units of glucose, and the beta-1,4-glycosidic bond gives it its unique structure and properties. The other options, a(1-4)glucose and a(1-2)glucose, are not correct because they do not accurately describe the linkage pattern in cellulose.Rate this question:
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- 35.
Which of the following isnt storage polysaccharide:
- A.
Amylose
- B.
Amylopectine
- C.
Glycogen
- D.
Chitin
Correct Answer
D. ChitinExplanation
Chitin is not a storage polysaccharide. It is a structural polysaccharide found in the exoskeletons of insects and crustaceans, as well as in the cell walls of fungi. Storage polysaccharides, on the other hand, are carbohydrates that serve as a reserve of energy in organisms. Examples of storage polysaccharides include amylose, amylopectin, and glycogen. Amylose and amylopectin are both forms of starch found in plants, while glycogen is the main storage polysaccharide in animals.Rate this question:
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- 36.
Microscope with eyepiece power =10 and objective lense power=40 the total magnification:
- A.
400
- B.
50
- C.
30
- D.
25
Correct Answer
A. 400Explanation
The total magnification of a microscope is calculated by multiplying the power of the eyepiece lens by the power of the objective lens. In this case, the eyepiece power is 10 and the objective lens power is 40. Multiplying these two values together gives us a total magnification of 400.Rate this question:
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- 37.
One of the next will appear red after staining :
- A.
DNA
- B.
RNA
- C.
Mitochondria
- D.
1 and 2
Correct Answer
C. MitochondriaExplanation
Mitochondria will appear red after staining. The question is asking which of the given options will show a red color after staining. DNA and RNA do not typically show a red color after staining, but mitochondria can be stained with certain dyes that result in a red color. Therefore, the correct answer is mitochondria.Rate this question:
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- 38.
The resolving power of light microscope:
- A.
0.2 nm
- B.
0.2 mm
- C.
3 nm
- D.
3 mm
Correct Answer
B. 0.2 mmExplanation
The given answer, 0.2 mm, is incorrect. The resolving power of a light microscope refers to its ability to distinguish between two closely spaced objects. It is determined by the wavelength of light used and the numerical aperture of the lens. The resolving power of a light microscope typically ranges from 200 nm to 300 nm, which is much smaller than 0.2 mm. Therefore, the correct answer should be 0.2 nm or 3 nm, depending on the options provided.Rate this question:
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- 39.
When tetracycline bind to newly formed bone the structure will be flourscent in
- A.
Green
- B.
Blue
- C.
Red
- D.
Colorless
Correct Answer
A. GreenExplanation
When tetracycline binds to newly formed bone, it forms a complex with calcium ions, resulting in a fluorescent green color. This fluorescence can be observed under certain wavelengths of light, and it is used as a marker to study bone growth and formation. The green color indicates the presence of tetracycline in the bone structure, allowing researchers to track its distribution and study its effects on bone development.Rate this question:
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- 40.
The TEM electrons ...... the section are detected to produce an image
- A.
-reflected
- B.
-deflected
- C.
-pass through
- D.
-non of the above
Correct Answer
C. -pass throughExplanation
The correct answer is "pass through" because in transmission electron microscopy (TEM), electrons pass through the specimen and are detected to produce an image. The electrons are not reflected or deflected, as in other imaging techniques. Therefore, the electrons passing through the section of the specimen are responsible for generating the image in TEM.Rate this question:
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- 41.
Which of the following tissue have moderate amount of ECM
- A.
-epithelium
- B.
Muscular
- C.
Nervous
- D.
Connective
Correct Answer
B. MuscularExplanation
Muscular tissue is the correct answer because it contains a moderate amount of extracellular matrix (ECM). The ECM in muscular tissue provides structural support and helps in transmitting force generated by muscle contractions. It also allows for flexibility and elasticity, enabling the tissue to stretch and recoil. This moderate amount of ECM is necessary for the proper functioning of muscular tissue, allowing it to contract and relax efficiently.Rate this question:
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- 42.
-basement membrane consist of;
- A.
Basal lamina
- B.
Reticular lamina
- C.
Layer of connective tissue
- D.
1+2
Correct Answer
D. 1+2Explanation
The correct answer is 1+2. The basement membrane is composed of two layers: the basal lamina and the reticular lamina. The basal lamina is a thin layer of extracellular matrix that is secreted by epithelial cells and provides structural support. The reticular lamina is a deeper layer that is composed of reticular fibers and provides additional support. Therefore, the correct answer is 1+2, as both the basal lamina and the reticular lamina are components of the basement membrane.Rate this question:
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- 43.
All of the following are characterstic of epithelial tissue except:
- A.
Polar
- B.
Polyhedral shape
- C.
Have layer of connective tissue under it
- D.
Vascular
Correct Answer
D. VascularExplanation
Epithelial tissue is a type of tissue that covers the surfaces of organs, lines body cavities, and forms glands. It is characterized by having tightly packed cells, a polarized structure with distinct apical and basal surfaces, and a variety of shapes including squamous, cuboidal, and columnar. Additionally, epithelial tissue does not have a layer of connective tissue underneath it, as connective tissue is found beneath other types of tissue such as muscle or nervous tissue. Unlike other types of tissue, epithelial tissue is avascular, meaning it lacks blood vessels.Rate this question:
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- 44.
The function of the tissue that is lining body cavities :
- A.
Secretion
- B.
Allow substances to pass through it easily
- C.
Produce lubricating fluid
- D.
Protection
Correct Answer
C. Produce lubricating fluidExplanation
The tissue that lines body cavities is responsible for producing lubricating fluid. This fluid helps to reduce friction and allows organs and structures within the body cavities to move smoothly. It helps to prevent damage or irritation that could occur from rubbing or contact between different tissues. The lubricating fluid also aids in the proper functioning of organs and ensures that they can perform their functions without any hindrance.Rate this question:
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- 45.
Which of the following involved in active transport;
- A.
Squamous epithelium
- B.
Cuboidal
- C.
Columnar
- D.
Transitional
Correct Answer
B. CuboidalExplanation
Cuboidal epithelium is involved in active transport. Active transport is a process that requires energy to move molecules or ions against their concentration gradient. Cuboidal epithelium is composed of cube-shaped cells that have a large surface area and are specialized for secretion and absorption. These cells actively transport molecules across the epithelium, allowing for the movement of substances from areas of lower concentration to areas of higher concentration. Therefore, cuboidal epithelium is involved in active transport.Rate this question:
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- 46.
Type of the tissue that found in anal canal ;
- A.
Squamous stratified non keratinized
- B.
Squamous stratified keratinized
- C.
Stratified transitional
Correct Answer
A. Squamous stratified non keratinizedExplanation
The correct answer is squamous stratified non keratinized. The anal canal is lined with a type of tissue called squamous stratified epithelium. This type of tissue is composed of multiple layers of cells, with the outermost layer being squamous (flat) cells. Non keratinized means that the cells in this tissue do not have a tough, protective layer of keratin. This is important in the anal canal as it allows for flexibility and protection without the need for a hard, keratinized layer.Rate this question:
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- 47.
All the following are features of flagellum,except :
- A.
Formed of macrotubules
- B.
Motile
- C.
Rotational movement and pushes forward
- D.
It removes fluid and debris in a certain direction
Correct Answer
D. It removes fluid and debris in a certain directionExplanation
The flagellum is a whip-like appendage found in many organisms that allows for motility. It is formed of microtubules and is responsible for rotational movement, pushing the organism forward. However, it does not have the ability to remove fluid and debris in a certain direction.Rate this question:
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- 48.
Mechanoceptors of the inner ear are:
- A.
Cilia
- B.
Flagella
- C.
Stereocilia
- D.
Microvilli
Correct Answer
C. StereociliaExplanation
Stereocilia are the correct answer because they are the mechanoceptors of the inner ear. Mechanoceptors are sensory receptors that respond to mechanical stimuli such as pressure, vibration, or movement. In the inner ear, stereocilia are found in the hair cells of the cochlea and are responsible for detecting sound waves and converting them into electrical signals that can be interpreted by the brain. Cilia, flagella, and microvilli are not specifically associated with the inner ear and do not play a role in hearing.Rate this question:
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- 49.
All the following are exocrine glands,except:
- A.
Salivary glands
- B.
Mammary gland
- C.
Pencreatic Islets
- D.
Sebaceous glands
Correct Answer
C. Pencreatic IsletsExplanation
The question asks for an exception among the given options, which are all exocrine glands. Exocrine glands are glands that secrete substances through ducts to the surface of an organ or tissue. Salivary glands, mammary glands, and sebaceous glands are all examples of exocrine glands. However, pancreatic Islets, also known as Islets of Langerhans, are endocrine glands located in the pancreas that secrete hormones directly into the bloodstream. Therefore, pancreatic Islets are not exocrine glands, making them the exception among the given options.Rate this question:
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- 50.
Which of the following junctions could be located anywhere:
- A.
Gap junction
- B.
Hemidesmosomes
- C.
Desmosomes
- D.
Zonula occudens
Correct Answer
A. Gap junctionExplanation
Gap junctions are specialized intercellular connections that allow direct communication between adjacent cells. They are found in various tissues and can be located anywhere within the body. Unlike other junctions mentioned, such as hemidesmosomes, desmosomes, and zonula occludens, which have specific functions and are typically found in specific locations within tissues, gap junctions are not restricted to any particular location and can be present in various tissues and organs.Rate this question:
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