YR11 Muscular System

The SMALL CONTRACTILE UNITS found within muscle fibres are called....

• Sarcomeres

• Myosin

• Actin

• Cross Bridges

When a muscle fibre contracts, the myosin in the sarcomere will

• Be pulled closer together

• Will remain still push the actin further apart

• Will shrink and become smaller

• Use its cross bridges to pull in the actin

What is the questioning mark linked to in this image of a sarcomere?

• Actin

• Cross Bridges

• Myosin

• ATP

Which of the following are functions of muscle?

• Create Movement

• Maintain Adequate Posture

• Perform Bodily Functions eg. digestion

• All of the above

What type of muscle is the heart made from?

What muscle sits over the shoulder joint?

• Bicep

• Pectoralis Major

• Deltoid

• Trapezius

What muscle is found in the lower back and is a major muscle used in a chin up?

• Trapezius

• Latissimus Dorsi

• Deltoid

• Rhomboids

Which muscle would be used for plantarflexion (pointing toes)?

• Gastrocnemius

• Tibialis Anterior

• Hamstrings

• Quadriceps

Which muscle fibre arrangement has MUSCLE FIBRES RUNNING AT AN ANGEL to the TENDONS?

• Pennate

• Fusiform

• Radiate

Which of the following are features of a fusiform fibre arrangement?

• FIBRES RUN the FULL LENGTH of MUSCLE (Faster contraction)

• FIBRES RUNS at an ANGLE to the TENDONS (Stronger contraction)

• FIBRES RADIATE OUT FROM a TENDON (wider attachment at one end)