Tag: science & technology

An adult human skeleton typically contains 206 bones. This includes axial bones (skull, spine, ribs) and appendicular bones (limbs, girdles). Infants have more bones (~270) which fuse as they grow. Options 210, 260, and 300 are incorrect counts.

The pancreas secretes insulin, which regulates blood sugar levels. Bile juice is produced by the liver, peptic juice by the stomach, so these are incorrect.

The kidney's primary function is filtering blood and removing waste products like urea, creatinine, and excess salts through urine. It does regulate blood pressure indirectly, but waste removal is its main role.

Hemoglobin is the red pigment in red blood cells that binds to oxygen in the lungs and transports it to body tissues. It does not destroy bacteria, prevent anemia, or directly utilize energy.

The skin is the largest organ in the human body by weight and surface area. It protects the body, regulates temperature, and provides sensory information. The liver is the largest internal organ.

The pituitary gland is called the 'master gland' because it controls other endocrine glands through hormones like TSH, ACTH, FSH, and LH. The pancreas regulates blood sugar, thyroid controls metabolism, and spleen is part of the immune system.

Newborn infants have approximately 300 bones, which fuse together during growth to form the 206 bones in an adult human skeleton. This fusion occurs in areas like the skull, spine, and pelvis.

Vitamin A is essential for healthy vision, particularly for night vision and maintaining the cornea. Deficiency can cause night blindness and xerophthalmia. Vitamin B is for metabolism, C for immunity, D for calcium absorption.