AP Biology : AP Biology
Study concepts, example questions & explanations for AP Biology
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Example Questions
Example Question #521 : Ap Biology
Which of the following is true regarding the transitional epithelial cells?
They are the same as pseudostratified epithelial cells
They merge into the basement membrane
They can transition among morphologies due to degree of tension
They are located in between layers of stratified epithelium
They can transition among morphologies due to degree of tension
Transitional epithelial cells are able to expand and contract based on the degree of tension. This transition to a different morphology depends on the cell layer in which the transitional cells are located.
Example Question #522 : Ap Biology
Which of the following best describes pseudostratified epithelial cells?
They can be easily confused with stratified epithelia
They may change morphology based on tension
Nuclei may be at different heights
They are layers of squamous cells
Nuclei may be at different heights
Pseudostratified epithelial cells are single layers of cells—simple epithelium—that may be easily confused as a stratified epithelium. This confusion arises from the cross section, which shows nuclei located at different heights. As a result, it appears as if pseudostratified epithelial cells are multiple cell layers.
Example Question #523 : Ap Biology
Which of the following is true regarding simple epithelia?
Only cuboidal cells can be present in simple epithelia
Not all cells have contact with the basement membrane
Simple epithelia are only one cell layer thick
Simple epithelia change morphology based on tension
Simple epithelia are only one cell layer thick
Simple epithelia are epithelial tissue that is only one cell layer thick; therefore, each cell has direct contact with the basement membrane. All epithelial cell morphologies can be found in simple epithelia.
Example Question #524 : Ap Biology
Which of the following is true regarding the structure of stratified epithelia?
Stratified epithelia are layers of cuboidal cells
It is a single layer of epithelial cells
It is a layer of cells made of epithelial cells of multiple morphologies
It is composed of two or more layers of epithelial cells
It is composed of two or more layers of epithelial cells
Stratified epithelia consist of two or more layers of epithelial cells. They plan an important role in protection from chemical and mechanical forces. Stratified epithelia are specialized into keratinized and transitional layers.
Example Question #11 : Types Of Cells And Tissues
Which of the following best describes the main functions of simple epithelium?
Absorption and filtration
Protection from mechanical forces
Protection from chemical forces
None of these
Absorption and filtration
Simple epithelia are layers of epithelial cells that are one cell thick. Simple epithelia are only composed of a monolayer of cells; therefore, their main functions are absorption and filtration.
Example Question #525 : Ap Biology
Which of the following best describes the order of the tissues associated with the basement membrane?
Outer tissue, basement membrane, connective tissue
Basement membrane, connective tissue, outer tissue
Basement membrane, outer tissue, bone
Basement membrane, outer tissue, connective tissue
Outer tissue, basement membrane, connective tissue
The basement membrane is a matrix of cells that separates the outer tissue from the connective tissue. It functions as a barrier to prevent deep penetration and also anchors down the outer tissues (e.g. the epithelium).
Example Question #521 : Ap Biology
In which of the following structures of the human body can transitional stratified epithelia be found?
Ureter
Skin
Urethra
Bladder
Skin
Transitional epithelia are specialized stratified epithelial cell layers that are present in tissues that need to stretch; therefore, transitional epithelia are located in the urethra, ureter, and bladder.
Example Question #526 : Ap Biology
Which of the following best describes where epithelial tissue is found in the human body?
All of these
Surface of organs
Lining of body cavities
Surface of blood vessels
All of these
Epithelial tissue is one of the major types of tissues in the human body. Epithelial cells function in secretion, absorption, protection, and transport. As a result, epithelial tissue is located at the interface of structures and tissues including the lining of body cavities, the surface of blood vessels, and the surface of organs.
Example Question #521 : Ap Biology
Which of the following best describes the role of cell junctions in epithelial tissue?
Facilitate the transport of chemical signals
Prevents absorption of toxins
Maintains cell structure and rigidity
Allows for contact between neighboring cells
Allows for contact between neighboring cells
Cell junctions are common in epithelial tissue because they allow for communication and contact between neighboring cells.
Example Question #22 : Types Of Cells And Tissues
During embryogenesis, epithelial tissue originates from which of the following germ layers?
Ectoderm
Mesoderm
Endoderm
All of these
All of these
During embryological development, epithelial tissue develops from all three germ layers (endoderm, mesoderm, and ectoderm).
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