Muscular System Test 2

Front

Which types of muscle tissue are voluntary?

Back

Skeletal muscle tissue is voluntary, meaning it is under conscious control.

Front

When a muscle contracts, it _______

Back

When a muscle contracts, it gets shorter.

Front

What is the explanation for how muscle contraction occurs?

Back

The sliding filament theory explains how muscle contraction occurs.

Front

What is the specialized version of the endoplasmic reticulum found in muscle cells?

Back

The specialized version of the endoplasmic reticulum in muscle cells is called the sarcoplasmic reticulum.

Front

What shortens during a muscle contraction?

Back

The sarcomere shortens during a muscle contraction.

Front

What are the three types of muscle tissue?

Back

The three types of muscle tissue are skeletal, cardiac, and smooth.

Front

What is the primary function of skeletal muscle?

Back

The primary function of skeletal muscle is to facilitate movement by contracting and pulling on bones.

Front

What is the role of the sarcolemma in muscle cells?

Back

The sarcolemma is the cell membrane of muscle cells that helps maintain the cell's environment and conducts electrical impulses.

Front

What is the function of T tubules in muscle contraction?

Back

T tubules help transmit the action potential into the muscle fiber, facilitating calcium release from the sarcoplasmic reticulum.

Front

What is the role of calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin, leading to contraction.