Tocopherol is the chemical name of which vitamin? MCQ with Answer and Explanation

Explanation:
The placenta acts as a temporary endocrine gland, secreting hCG (which maintains the corpus luteum), hPL (which alters maternal metabolism for fetal growth), and high levels of estrogen and progesterone (which maintain the uterine lining and suppress further ovulation). Prolactin, however, is primarily secreted by the anterior pituitary gland, although its levels rise significantly during pregnancy to prepare the mammary glands for lactation.

Explanation:
Blood group O has neither A nor B antigens on the red blood cells, but has both anti-A and anti-B antibodies in plasma. It is the universal donor for red cells. Group AB has both antigens, A has A antigen, B has B antigen.

Explanation:
A joint (articulation) is where two or more bones meet, allowing varying degrees of movement. Tendons connect muscle to bone, ligaments bone to bone, cartilage cushions. Joints are classified as fibrous, cartilaginous, or synovial.