Introduction to Anatomy Quiz 16

Muscle fiber: ______________________

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

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

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

• Are made of myosin

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

Tags

NGSS.HS-LS1-6

Myofilaments: ______________________

• Are made of actin

• Are made of myosin

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

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

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

Thick myofilaments: ______________________

• Are made of myosin

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

• Are made of actin

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

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

Thin myofilaments: ______________________

• Are made of actin

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

• Are made of myosin

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

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

Cross bridge: ______________________

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

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

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

• Are made of myosin

• Are made of actin

6. Mitochondria: ______________________

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

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

• (B) Are made of myosin

• (E) Are made of actin

• (A) The powerhouse of cells; they convert fuel, like sugars, into usable energy

Tags

NGSS.HS-LS1-7

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

• fiber

• tissue

• organ

• system

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

• blood

• water

• nutrient

• waste

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

• sarcomere

• myofibril

• actin

• myosin

Skeletal muscle is ____________ muscle.

• voluntary

• involuntary

• cardiac

• smooth