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

• Movement for your body

• Maintaining posture

• Making red blood cells

• Heat production for the body

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

• excitability

• extensibility

• elasticity

• contractability

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

• skeletal

• smooth

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

• skeletal muscle

• cardiac muscle

• smooth muscle

Which membrane covers an individual muscle fiber?

• endomysium

• epimysium

• perimysium

What type of channel on the axon terminal is stimulated by an incoming action potential and allows Calcium to enter the axon?

• chemically-gated

• voltage-gated

• myosin-gated

• gastrointestinal

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

• Calcium

• Acetylcholine

• Oxygen

• K+

What attaches muscle to bone?

• ligaments

• tendons

• Sacromeres

• Sliding filaments

Which two structures block the active site on an actin filament?

• troponin & tropomyosin

• actin & perimysium

• z-disc & the m-line

• calcium & myosin

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

• clavicle

• humerus