Question

Myoglobin is found in?
(a)Muscles
(b)Blood
(c)Lungs
(d)RBCs

Answer 1

Hint: The cells of this component of the body contain protein filaments called actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Its function is to produce force and motion.

Complete answer:
Myoglobin is a pigment found in the muscles of the human body, which imparts a red color to it. The red muscle fibers store oxygen and have more mitochondria than white muscle fibers hence provide more energy and do not fatigue for a long time.

Additional Information:
-Muscle fibers-There are two types of muscle fiber in birds and mammals, which are red and white muscle fiber. The white muscle fibers are longer and thicker in size and are less vascularized. White muscle fibers are light-colored, so lack myoglobin and do not store oxygen. Endomysium is a connective tissue sheath around muscle fiber. Epimysium is a connective tissue around the whole muscle. Sarcoplasmic reticulum is less developed in red muscle fibers but is more developed in white muscle fiber. Example-red muscle fibers are found in the extensor muscle of the back and flight muscle of kite while white muscle fibers are found in the eyeball muscles and flight muscles of the sparrow.
-Muscle-Muscles form 40% of the body weight. The duration for which a muscle can contract depends upon the supply of ATP to the muscle fiber. Cardiac muscles are found in the myocardium of the heart. Cardiac muscles represent both, smooth as well as striated muscle fibers.

So, the correct answer is, ‘Muscles.’

Note: Muscles allow a person to move, speak, and chew and control heartbeat, breathing, and digestion. Other unrelated functions, including temperature regulation and vision, also rely on the muscular system. The Red muscle fibers show slow and sustained contraction while the white muscle fibers show rapid and short contractions.