Muscular System

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

• Movement for your body

• Maintaining posture

• Heat production for the body

•    Making red blood cells

    Which of the following words means “the ability to recoil or bounce back to the original shape”?

• excitability

• contractability 

• extensibility

•  elasticity

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

• skeletal

• smooth

•  gastrointestinal

•  cardiac

   Which type of muscle(s) is/are nonstriated?

• Skeletal Muscle

• Cardiac Muscle

• Smooth Muscle

    Which membrane covers an individual muscle fiber?

• Endomysium

• Epimysium

• Perimysium

• Myomesium

    When Calcium ions enter the neuromuscular junction, what neurotransmitter is released across the synaptic cleft?

• Calcium

• K+

• Na+

• Acetycholine

    What attaches muscle to bone?

• Ligaments

• Tendons

• Sliding Filaments

• Sarcomeres

When you do sit-ups, your rectus abdominus is the _________________ and the latissimus dorsi is the

• insertion; origin

• origin; insertion         

•     antagonist; prime mover

• prime mover; antagonist

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

• 1

• 2

• 4

• 3

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

• lack of oxygen

• lack of sodium

• lack of calcium

• lack of glucose