Muscular System Test Review

Which of these is NOT a major task of the muscular system?

• Movement for your body

• Heat production for the body

• Maintaining posture

• Making red blood cells

Which type of muscle is involuntary and makes up many of your internal organs?

• skeletal

• smooth

• gastrointestinal

• cardiac

Which membrane covers an individual muscle fiber?

• endomysium

• epimysium

• perimysium

What attaches muscle to bone?

• ligaments

• tendons

• sliding filaments

• sarcomeres

Which myofilament structure is thicker and has a bump that attaches to the other myofilament for muscle contraction?

• actin

• calcium

• myosin

• perimysium

When myosin heads make a cross bridge and bend pulling the actin myofilament toward the center of the sarcomere, it is called the ________________.

• power stroke

• neuromuscular junction

• return stroke

• ATP Contraction

The deltoid is attached to the clavicle and the humerus.  Which one of these points is the insertion?

• clavicle

• humerus

• neither

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

• 1

• 2

• 3

• 4

When you become out of breath and your muscles begin to burn during a workout, this is caused by?

• lack of calcium

• lack of water

• lack of ATP due to low oxygen

• lack of creatine

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

During rigor mortis, __________ floods the muscle fibers but a lack of ____________ prevents them from detaching.

• Calcium, ATP

• ATP, Calcium