AP Biology : AP Biology
Study concepts, example questions & explanations for AP Biology
All AP Biology Resources
Example Questions
Example Question #23 : Types Of Cells And Tissues
Which of the following structures is created from the infolding of epithelial tissues?
Keratin
Glands
Cell junctions
Stratified epithelia
Glands
The infolding of epithelial tissue forms glands that function in the exocrine and endocrine systems. Glands secrete products that are taken up by the circulatory system for delivery.
Example Question #531 : Ap Biology
Which of the following best explains how epithelial cells are involved in sensory detection?
By chemotaxis
By sensing external signals through cilia
Secretion of hormones
Infolding into glands
By sensing external signals through cilia
Epithelial tissue has a sensory detection function that utilizes cilia to sense signals from the external environment. Once the signal is recognized and transduced, epithelial cells secrete messenger proteins that transmit the signal downstream.
Example Question #532 : Ap Biology
Which of the following is not true regarding keratinized stratified epithelia?
Keratinized epithelia are found in tissues that stretch
Keratinized epithelia are waterproof
The exterior of the cell layers contains keratin
The exterior of the cell layers is dead
Keratinized epithelia are found in tissues that stretch
Keratinized epithelia are specialized stratified epithelia. They consist of a layer of dead exterior cells that contain the protein keratin. Keratin “waterproofs” the cells, offering protection. As a result, keratinized epithelia are commonly found in mammalian skin.
Example Question #533 : Ap Biology
Which of the following is true regarding the endothelium?
It is a specialized type of epithelium
It is neither the lining of the lymphatic system nor a specialized type of epithelium
It is the lining of the lymphatic system
It is both the lining of the lymphatic system and a specialized type of epithelium
It is both the lining of the lymphatic system and a specialized type of epithelium
The endothelium is a specialized type of epithelium that lines the lymphatic and circulatory system. The endothelium originates from the mesoderm during embryogenesis and develops into squamous cells. Within the lymphatic and circulatory systems, endothelial cells function as barriers, in blood clotting, and in inflammation.
Example Question #25 : Understanding Epithelial And Endothelial Cells
Which of the following is the storage form of lipids in adipose tissue?
Starch
Proteins
Phospholipids
Triglycerides
Carbohydrates
Triglycerides
The main storage form of lipids is in the form of triglycerides. Phospholipids are found in the cell membrane.
Example Question #25 : Types Of Cells And Tissues
Which of the following characteristics of smooth muscle is false?
Smooth muscle cells have a single, central corkscrew nucleus
Smooth muscle is moved via involuntary movement
All choices reflect true characteristics of smooth muscle
Smooth muscle is striated
Smooth muscle is striated
Smooth muscle is used for numerous involuntary actions of the body. It is not striated and has a single, central corkscrew nucleus.
Example Question #1 : Understanding Muscle Cells
Which of the following characteristics of skeletal muscle is false?
Skeletal muscles are moved by the body voluntarily
Skeletal muscle cells have multiple nuclei
Skeletal muscle is striated
All of the choices reflect true characteristics of skeletal muscle
All of the choices reflect true characteristics of skeletal muscle
Skeletal muscles are used for voluntary movement of the body. They are striated and have multiple nuclei at the periphery of each cell.
Example Question #2 : Understanding Muscle Cells
Which of the following characteristics of cardiac muscle is false?
All answer choices reflect true characteristics of cardiac muscle
Cardiac muscle cells have a single nucleus
Cardiac muscle is controlled by voluntary movements
Cardiac muscle is striated
Cardiac muscle is controlled by voluntary movements
Cardiac muscle is used for involuntary contractions of the heart, allowing for the movement of blood. Cardiac muscles are striated and have a single, central nucleus in each cell.
Example Question #3 : Understanding Muscle Cells
The basic contractile unit of a muscle is known as a __________.
Muscle fiber
Bundle
Sarcomere
Myofibril
Sarcomere
Sarcomeres represent the basic contractile unit of the muscle and can be used to show the process of contraction. Numerous sarcomeres make up myofibril, which combine to form a muscle fiber (myocyte), which combine to form a fasciculus, which combine to form muscle.
Example Question #4 : Understanding Muscle Cells
Which of the muscle types is controlled by voluntary motion?
Cardiac muscle
Skeletal muscle
Smooth muscle
Connective muscle
Skeletal muscle
Skeletal muscle is attached to bones by tendons, allowing you to move around. These are the muscles that you can consciously control.
Smooth muscle and cardiac muscle are not controlled consciously. You cannot consciously control your heart beat or your blood vessels constriction.
All AP Biology Resources
