AP Biology : Understanding Muscle Cells
Study concepts, example questions & explanations for AP Biology
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Example Questions
Example Question #21 : Understanding Muscle Cells
Skeletal muscle tissue cannot perform which of the following types of muscle contractions?
Fast contraction
Involuntary
Slow contraction
Voluntary
Involuntary
Skeletal muscle tissue is involved in voluntary skeletal movement. Skeletal muscle can be divided into type I, type IIa, type IIx, and type IIb categories. Type I tissues exhibit slow contractions and type II are involved in fast contractions.
Example Question #21 : Understanding Muscle Cells
Where in the human body can skeletal muscle tissue be found?
None of these
In the walls of organs
Anchored to bones by tendons
In the heart
Anchored to bones by tendons
Skeletal muscle tissue is one of three types of muscle tissue. Skeletal muscle, as the name implies, is anchored to bones by tendons and controls skeletal movement and posture.
Example Question #51 : Types Of Cells And Tissues
Where in the human body can smooth muscle tissue be found?
Anchored to bones
The walls of organs
Within bone marrow
Only in the heart
The walls of organs
Smooth muscle tissue is a categorization of muscle tissue that is involved in involuntary contractions. Smooth muscle tissue can be found within the walls of organs such as the bladder, intestines, and stomach.
Example Question #493 : Cellular Biology
Which of the following is true regarding the structure of smooth muscle tissue?
It is not striated
All of these
None of these
It is bundled by connective tissue
All of these
Smooth muscle tissue is involved in involuntary contractions. This type of muscle tissue is not striated and is bundled by connective tissue.
Example Question #21 : Understanding Muscle Cells
Smooth muscle tissue performs which of the following types of muscle contractions?
Involuntary
Contractions do not involve myosin and actin
The mechanism and function of contraction is different in every organ
Voluntary
Involuntary
In smooth muscle tissue, contraction is involuntary and is caused by the sliding of actin and myosin filaments over one another. The function and mechanics of these contractions are generally the same in every organ; however, the physiological impact of each contraction may differ.
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 #22 : Understanding Muscle Cells
Which of the following does not describe the structure of cardiac muscle tissue?
Each cell has one nucleus
It is striated
It is not striated
Intercalated disks connect cardiomyocytes
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 #23 : Understanding Muscle Cells
Which of the following best describes cardiac muscle tissue contractions?
Contractions are involuntary
All of these
Contractions are rhythmic and continue for the entire life of a human being
Contraction propels blood out of the atria and ventricles
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 #24 : Understanding Muscle Cells
Which of the following is not a feature of type I skeletal muscle tissue?
It has many mitochondria
It is involved in aerobic activities
It is "red" muscle tissue
It is classified as fast twitch muscle tissue
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.
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