AP Biology : AP Biology
Study concepts, example questions & explanations for AP Biology
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Example Questions
Example Question #495 : Cellular Biology
Which of the following types of muscle tissue is only found in the heart?
Both cardiac and smooth
Smooth
Skeletal
Cardiac
Cardiac
Cardiac muscle tissue is only found in the heart.
Example Question #561 : Ap Biology
Which of the following does not describe the structure of cardiac muscle tissue?
It is striated
It is not striated
Intercalated disks connect cardiomyocytes
Each cell has one nucleus
It is not striated
Cardiac muscle tissue is a type of striated muscle tissue that is complex and interconnected. Cardiomyocytes are connected end-to-end by intercalated disks. This allows for quick transmission of electrical signals. Cardiomyocytes have one nucleus each.
Example Question #562 : Ap Biology
Which of the following best describes cardiac muscle tissue contractions?
Contraction propels blood out of the atria and ventricles
All of these
Contractions are rhythmic and continue for the entire life of a human being
Contractions are involuntary
All of these
Cardiac muscle tissue is located only in the heart and contractions in this type of tissue are critical in propelling blood through the circulatory system. Contraction is involuntary, rhythmic, and continues through the entire life of a human.
Example Question #498 : Cellular Biology
Which of the following is true regarding all type II skeletal muscle tissues?
They are "white" muscles
They are aerobic
They are fast twitch muscles
They are anaerobic
They are fast twitch muscles
Type II skeletal muscle tissues are all fast twitch muscles, but vary in their use of oxygen.
Example Question #563 : Ap Biology
Which of the following is not a feature of type I skeletal muscle tissue?
It is "red" muscle tissue
It is involved in aerobic activities
It is classified as fast twitch muscle tissue
It has many mitochondria
It is classified as fast twitch muscle tissue
Type I skeletal muscle tissue is a red—oxygenated—muscle tissue that carries oxygen and is involved in aerobic activity. As a result, type I tissue is a slow twitch muscle. Type I skeletal muscle tissue contains many mitochondria.
Example Question #564 : Ap Biology
Which of the following best represent characteristics of type IIa skeletal muscle tissues?
They are both aerobic and contain many mitochondria
They contain many mitochondria
They don't have many mitochondria and are anaerobic
They feature aerobic activity
They are both aerobic and contain many mitochondria
Type IIa skeletal muscle tissue is a subtype of skeletal muscle tissue that is related to fast twitch muscles. Type IIa tissues are aerobic and have many mitochondria.
Example Question #565 : Ap Biology
Which of the following best describes how type IIb skeletal muscle tissue differs from type IIa skeletal muscle tissue?
Type IIb tissue has many mitochondria while type IIa tissue has fewer mitochondria
Type IIb tissue is aerobic while type IIa tissue is anaerobic
Type IIb tissue has no mitochondria while type IIa tissue has many mitochondria
Type IIb tissue is anaerobic while type IIa tissue is aerobic
Type IIb tissue is anaerobic while type IIa tissue is aerobic
Type IIb skeletal muscle tissue is a subtype of skeletal muscle tissue that is anaerobic and has fewer mitochondria than type IIa.
Example Question #566 : Ap Biology
Which of the following best describes type IIx skeletal muscle contraction?
It is the fastest muscle type in humans
All of these
It contracts more quickly than aerobic muscles
Sustains short bursts of anaerobic contraction
All of these
Type IIx skeletal muscle tissue is the fastest muscle type in humans. This subtype of skeletal muscle tissue is characterized by short bursts of anaerobic contraction. It is also able to contract more quickly than aerobic muscles.
Example Question #567 : Ap Biology
In regard to muscles, which of the following statements best defines a sarcomere?
Sarcomeres include A bands and I bands
Sarcomeres are the areas between two I bands
Sarcomeres are the areas between Z lines
Sarcomeres are Z lines
Sarcomeres are the areas between Z lines
Sarcomeres are considered to be the functional units of muscles and are defined as the areas between two Z lines. Sarcomeres are the units that are responsible for the striated appearance of certain muscle types (skeletal and cardiac).
Example Question #35 : Understanding Muscle Cells
Which of the following best represents the generic term for a muscle cell?
Myoblast
Sarcomere
Myofibril
Myocyte
Myocyte
Muscle cells are often referred to as “myocytes.” Myocytes are tubular cells that develop during a process called myogenesis and specialize based on their association with specific muscle types.
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