The part of the human ear that converts sound vibrations into neural signals is the: MCQ with Answer and Explanation

Explanation:
The placenta is a temporary organ formed by both fetal (chorion) and maternal (endometrium) tissues. It facilitates the exchange of oxygen, nutrients, and waste products between mother and fetus, and produces hormones (e.g., hCG, progesterone). The umbilical cord connects the fetus to the placenta. The amnion surrounds the embryo.

Explanation:
The adrenal medulla produces adrenaline and noradrenaline; cortisol is produced by the adrenal cortex. So B is incorrect.

Explanation:
The retina is the inner lining of the eye containing rods and cones, the photoreceptor cells for vision. The cochlea is a spiral-shaped cavity in the inner ear containing the organ of Corti, essential for converting sound vibrations into nerve impulses. Taste buds are primarily on the tongue but are also found on the soft palate, epiglottis, and upper esophagus. Thus, statements 1 and 2 are correct.