Muscle System

Front

What is a fascicle?

Back

A fascicle is a bundle of muscle fibers surrounded by perimysium, which is a connective tissue.

Front

What is the Z Line in a sarcomere?

Back

The Z Line is a boundary that defines the edges of a sarcomere and anchors the thin filaments (actin).

Front

How much ATP is used in each myosin/actin cross-bridge cycle?

Back

1 ATP is used in each myosin/actin cross-bridge cycle.

Front

What muscle is referred to as the Pectoralis?

Back

The Pectoralis, commonly known as 'pecs', is a major muscle in the chest.

Front

What is a muscle fiber?

Back

A muscle fiber is a single muscle cell that is capable of contraction.

Front

What is the role of epimysium?

Back

Epimysium is a connective tissue that surrounds the entire muscle, providing structure and support.

Front

What is perimysium?

Back

Perimysium is the connective tissue that surrounds each fascicle within a muscle.

Front

What is the function of the M Line in a sarcomere?

Back

The M Line is the middle line of the sarcomere that anchors the thick filaments (myosin).

Front

What is the H Line in a sarcomere?

Back

The H Line is the region in the sarcomere where only thick filaments (myosin) are present, and it appears lighter under a microscope.

Front

What are the main types of muscle tissue?

Back

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