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Questions and Answers
Which of the following are types of muscle tissue?
Which of the following are types of muscle tissue?
- Skeletal (correct)
- Nervous
- Cardiac (correct)
- Smooth (correct)
Ectomorphs are characterized by a delicate frame and fast metabolism.
Ectomorphs are characterized by a delicate frame and fast metabolism.
True (A)
What is the primary function of antigravity muscles?
What is the primary function of antigravity muscles?
To resist the pull of gravity and stabilize joints.
The Body Mass Index is calculated by dividing one's weight in kilograms by the square of one's _____ in meters.
The Body Mass Index is calculated by dividing one's weight in kilograms by the square of one's _____ in meters.
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What are the characteristics of muscle tissue?
What are the characteristics of muscle tissue?
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Match the body types with their descriptions:
Match the body types with their descriptions:
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Study Notes
Stability
- Maintains body posture and prevents unwanted movements.
- Antigravity muscles help resist gravity and stabilize joints.
- Sphincters act as internal muscular rings to regulate the movement of various substances such as food, blood, fluids, urine, feces, and bile.
Types of Muscle Tissue
- Cardiac Muscle: Specialized muscle found in the heart, responsible for pumping blood.
- Skeletal Muscle: Voluntary muscle attached to bones that facilitate movement.
- Smooth Muscle: Involuntary muscle found in walls of hollow organs, controlling internal movement.
Characteristics of Muscle
- Excitability: Ability to respond to stimuli such as chemical signals, nerves, and stretching.
- Conductivity: Process by which signals for contraction spread throughout the muscle.
- Contractility: Muscle's unique ability to shorten actively.
- Extensibility: Capability of muscles and muscle cells to be stretched without damage.
- Elasticity: Muscles’ ability to return to their original size and shape after being stretched.
Body Mass Index
- Calculated as weight (kg) divided by height (m) squared.
- Serves as an indicator for categorizing individuals as underweight, normal weight, overweight, or obese.
Body Types
- Ectomorph: Characterized by a slim frame, resembling a long-distance runner; often has a fast metabolism which makes it challenging to gain weight or muscle.
- Endomorph: Typically has a higher percentage of body fat, wider hips, and may struggle with weight loss.
- Mesomorph: Naturally muscular and athletic build, often gains muscle easily and has a strong physique.
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