Question

In human beings, which part shows the maximum increase in weight from birth to adulthood?
(a) Brain
(b) Fat
(c) Muscles
(d) Skeleton

Answer 1

The soft tissue present in most animals displays the highest rise in weight in human beings from birth to adulthood. They work to generate force and movement. They are primarily responsible for the maintenance and alteration of posture, locomotion, and the movement of internal organs, such as the contraction of the heart and the movement of food through peristalsis through the digestive system.

Complete step by step answer:
In humans, due to the occurrence of development, the weight of the body increases continually from birth to adulthood. Development entails the division of cells and an increase in cell size. Both of these occur continuously at some phases of the body. They only occur in cell replacement phenomena after that. But certain organs exhibit development in the human body. Muscles display maximum growth in human beings, while the brain demonstrates minimum growth.
As children grow, in the developing years, muscle mass gradually increases. At the time of birth, the child’s weight of the body is about 25 percent of their muscle mass, and during adulthood, the person’s body weight is about 40 percent of their muscle mass.
Muscle cells produce actin and myosin protein filaments that slip past one another, creating a contraction that changes both the cell's length and shape.
So, the correct answer is, ‘Muscles’.

Note: The human body's development is the process of growth to maturity.
The process starts with fertilization, where a sperm cell from a male penetrates an egg released from a female's ovary. By mitosis and cell division, the resulting zygote divides and then implants the resulting embryo in the uterus, where the embryo continues to develop through the foetal stage before birth.
Further development and growth, affected by genetic, hormonal, environmental, and other influences, continues after birth and involves both physical and psychological development. This continues throughout life: into adulthood, through childhood and adolescence.