Introduction to Anatomy Flashcard 16

Front

Muscle fiber

Back

The same thing as a muscle cell; can be very long, often extending the entire length of the muscle

Tags

NGSS.HS-LS1-6

Front

Myofilaments

Back

Can be made of myosin molecules or actin molecules; there are a lot of myofilaments in every muscle fiber

Front

Thick myofilaments:

Back

Are made of myosin

Front

Thin myofilaments:

Back

Are made of actin

Front

Cross bridge

Back

When the thin myofilaments change shape, myosin molecules in the thick myofilaments can connect to the actin myofilament, forming this

Front

Mitochondria

Back

The powerhouse of cells; they convert fuel, like sugars, into usable energy

Tags

NGSS.HS-LS1-7

Front

A muscle cell is long and thin, like a string, so another name for a muscle _________________.

Back

fiber

Front

Muscles need a lot of fuel and oxygen to do their work, so they must have a very rich __________ supply.

Back

blood

Front

The simplest contractile unit of a muscle is called the _____________.

Back

sarcomere

Front

Skeletal muscle is ____________ muscle.

Back

voluntary