Untitled Flashcards Set

What are the primary functions of muscles?

Movement, stabilization, and heat production.

What type of muscle is striated and voluntary?

Skeletal Muscle.

What type of muscle controls digestion and blood flow?

Smooth Muscle.

Which muscle type is found only in the heart?

Cardiac Muscle.

What action does the Biceps Brachii perform?

Flexes the elbow and rotates the forearm.

What are Parallel Fibres in muscles?

Muscle fibers that run parallel to the length of the muscle.

What do Pennate Fibres optimize?

Force production, though they reduce range of motion.

What is the basic structure of skeletal muscles?

Bundles of muscle fibers wrapped in connective tissue, each fiber being a single cell.

What initiates muscle contractions?

Nervous system signals transmitted by motor neurons.

What does the all-or-none principle state?

A muscle fiber will fully contract when stimulated by a threshold stimulus.

What occurs during a Concentric Contraction?

The muscle shortens while generating force.

What defines Eccentric Contraction?

The muscle lengthens while still generating force.

What is the role of Agonists?

They are the primary movers responsible for specific movements.

What are Type I Muscle Fibers known for?

Endurance-oriented and resistant to fatigue.

What characterizes Type II Muscle Fibers?

They provide quick, powerful bursts of movement.