Fundamentals of Muscular Physiology: Key Terms and Concepts Quiz

1. What is excitability?

The ability to reproduce asexually.

The ability to generate ATP through photosynthesis.

Is the ability to be stimulated or irritability.

The ability to absorb nutrients from the environment.

Excitability is a physiological property that enables a cell or organ to respond to stimuli. It is not related to absorbing nutrients, reproduction, or ATP generation through photosynthesis.

Explanation

Excitability is a physiological property that enables a cell or organ to respond to stimuli. It is not related to absorbing nutrients, reproduction, or ATP generation through photosynthesis.

About This Quiz

Explore the roles of muscles in movement, heat production, and posture maintenance. This learning module enhances your understanding of muscular physiology, focusing on essential vocabulary and concepts critical for students and professionals in the biological sciences.

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2. What is contractility?

Is the ability to contract or shorten, allows muscle tissue to pull on bones.

Contractility is the ability of muscle tissue to regulate body temperature.

Contractility is the ability of muscle tissue to expand and lengthen.

Contractility is the ability of muscle tissue to produce electricity.

Contractility refers specifically to the ability of muscle tissue to contract or shorten, enabling movement of body parts.

Explanation

Contractility refers specifically to the ability of muscle tissue to contract or shorten, enabling movement of body parts.

3. What is extensibility?

Is the ability to extend or stretch, allowing muscles to return to their resting length after having contracted.

Extensibility is the measure of a material's ability to support weight without breaking.

Extensibility is the ability of a substance to bounce back to its original shape after being stretched.

Extensibility is the term used to describe the flexibility of a joint in the body.

Extensibility specifically refers to the ability of muscles to stretch and return to their original length after contraction, different from other physical properties like flexibility or elasticity.

Explanation

Extensibility specifically refers to the ability of muscles to stretch and return to their original length after contraction, different from other physical properties like flexibility or elasticity.

4. What is a sarcomere?

Is defined as the segment between two neighboring Z-lines (or Z-discs, or Z bodies).

The process of cell division in plants

A unit of measurement for sound frequency

A type of cell found in the brain

A sarcomere is a structural unit of a myofibril in a muscle that is responsible for muscle contraction. It is defined as the segment between two neighboring Z-lines (or Z-discs, or Z bodies), not related to brain cells, cell division in plants, or sound frequency.

Explanation

5. What is the I-band?

C. The area where ATP is converted to energy for muscle movement.

A. The region where muscle contraction begins.

(for isotropic) is the zone of thin filaments that is not superimposed by thick filaments.

D. The segment of a muscle fiber that spans from one Z-line to the next.

B. A dark band formed by overlapping thick and thin filaments.

The I-band is specifically defined as the zone of thin filaments that is not superimposed by thick filaments, playing a crucial role in muscle contractions.

Explanation

The I-band is specifically defined as the zone of thin filaments that is not superimposed by thick filaments, playing a crucial role in muscle contractions.

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