Introduction to Muscular System

After ACH is broken down and no longer attached to muscle cell receptors, what happens to the muscle cell?

• It contracts

• It spasms

• It relaxes

What is the term when a muscle cell is more positively charged due to the intake of sodium ions?

• polarizaion

• depolarization

• polar

• bear

What is the name of the gap between the axon terminal and the muscle cells?

• synaptic cleft

• upper cleft

• gap

• synaptic fluid

How many muscles are there in the human body?

• More than 700

• Around 450

• Exactly 500

• Over 600

What is the main function of the bicep?

• To extend the forearm

• To flex and twist the forearm

• To support the trunk

• To move the thigh away from the body's midline

What is the function of the deltoid muscle?

• Rotating the humerus

• Flexing the foot at the ankle joint

• Extending the knee

• Prime mover of the arm

Which muscle helps in doing pull-ups at the gym?

• Pectoralis major

• Serratus anterior

• Trapezius

• Latissimus dorsi

What is the role of the external oblique muscles?

• To pull the scapula forward

• To compress the abdominal cavity

• To extend the hand

• To flex the forearm at the elbow

Which group of muscles includes four muscles on the front of the thigh?

• Hamstrings

• Quadriceps

• Abductor muscle group

• Finger flexors

What is the function of the gastrocnemius muscle?

• Flexing the foot at the ankle joint and the leg at the knee joint

• Rotating the humerus

• Helping with hip movement

• Supporting the weight of the arm