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Muscular System and Human Physiology Quiz

#1

Which type of muscle is striated and under voluntary control?

Skeletal muscle
Explanation

Striated and voluntary.

#2

What is the medical term for a muscle cell?

Myocyte
Explanation

Cell within muscle tissue.

#3

Which structure connects muscle to bone?

Tendon
Explanation

Muscle-to-bone connector.

#4

Which muscle is often called the 'six-pack' muscle?

Rectus abdominis
Explanation

Commonly known as 'six-pack'.

#5

What is the name of the protein responsible for muscle contraction?

Myosin
Explanation

Key protein for contraction.

#6

Which of the following is NOT a function of the muscular system?

Facilitate movement of blood throughout the body
Explanation

Not involved in blood movement.

#7

What is the name of the neurotransmitter responsible for initiating muscle contraction at the neuromuscular junction?

Acetylcholine
Explanation

Neurotransmitter initiating contraction.

#8

Which hormone stimulates muscle growth and protein synthesis?

Testosterone
Explanation

Promotes muscle growth and protein synthesis.

#9

Which type of muscle fatigue occurs due to the buildup of lactic acid?

Peripheral fatigue
Explanation

Caused by lactic acid buildup.

#10

Which connective tissue surrounds individual muscle fibers?

Endomysium
Explanation

Connective tissue around fibers.

#11

Which muscle is responsible for extending the knee?

Quadriceps femoris
Explanation

Extends the knee.

#12

What is the function of the sarcomere within a muscle fiber?

To generate force during contraction
Explanation

Force generation unit.

#13

Which type of muscle fibers are primarily responsible for endurance activities?

Type I fibers
Explanation

Endurance-oriented fibers.

#14

Which muscle is responsible for abducting the arm?

Deltoid
Explanation

Arm abduction muscle.

#15

Which muscle is responsible for plantar flexion of the foot?

Gastrocnemius
Explanation

Foot plantar flexor.

#16

What is the term for the smallest contractile unit of a muscle fiber?

Sarcomere
Explanation

Basic contractile unit.

#17

Which muscle is responsible for dorsiflexion of the foot?

Tibialis anterior
Explanation

Foot dorsiflexor.

#18

Which muscle is responsible for adduction of the shoulder?

Pectoralis major
Explanation

Shoulder adductor.

#19

Which type of muscle is found in the walls of hollow organs such as the stomach and intestines?

Smooth muscle
Explanation

Present in hollow organs.

#20

Which of the following muscles is responsible for breathing?

Diaphragm
Explanation

Responsible for breathing movements.

#21

Which muscle is responsible for flexing the forearm?

Brachioradialis
Explanation

Forearm flexion muscle.

#22

Which of the following muscles is NOT part of the rotator cuff?

Teres major
Explanation

Excluded from rotator cuff.

#23

Which ion is required for the release of calcium ions from the sarcoplasmic reticulum during muscle contraction?

Sodium
Explanation

Necessary for calcium release.

#24

Which muscle is responsible for flexing the thigh at the hip joint?

Psoas major
Explanation

Hip flexion muscle.

#25

Which ion binds to troponin during muscle contraction?

Calcium
Explanation

Binds to troponin.

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