Muscle Basics

Which of the following is NOT a job of muscles?

• Movement of food down the esophagus

• Control blood pressure

• Detecting temperature

• Beating the heart

Organize these options into the right categories

Groups:

(a) Cardiac

,

(b) Smooth

,

(c) Skeletal

• found in the heart

• found in internal organs

• found attached to bones

Which muscle type is the only one that humans can consciously move?

• cardiac

• smooth

• skeletal

• cartilage

What structure attaches skeletal muscles to bones?

• Tendons
• Muscle fibers
• Cartilage
• Ligaments

A muscle is made of ​muscle fibers and they are made of ​ (a)   which are made of ​ (b)   .

• myofibrils
• sarcomeres
• actin
• Z lines

What TWO types of myofilaments help to contract a muscle?

• Calcium and Sodium
• Collagen and Elastin
• Actin and Myosin
• Tropomyosin and Troponin

What are fast-twitch muscles optimized for?

• Fast-twitch muscles are optimized for endurance and stamina.
• Fast-twitch muscles are optimized for flexibility and balance.
• Fast-twitch muscles are optimized for long-distance running.
• Fast-twitch muscles are optimized for explosive strength and speed.

In order to build skeletal muscle, what must happen first?

• Muscle breakdown or tearing.

• Ingest muscle-building supplements.

• Decrease protein intake.

• Perform cardio exercises.

After working out your skeletal muscles, what are important post-workout activities?

• Hydration and minimal muscle recovery.

• Cardio and eating foods high in sugar.

• Lowering hydration and skipping meals

• Replenishment of protein and rest.

Actin and myosin are types of what?

• Proteins
• Nucleic acids
• Lipids
• Carbohydrates