The enzyme that breaks down starch into sugar in the mouth is: MCQ with Answer and Explanation

Explanation:
Myoglobin is an oxygen-binding protein in muscle cells, containing a single heme group. It has a higher affinity for oxygen than hemoglobin, facilitating oxygen diffusion and storage in muscles. Hemoglobin is in blood, ferritin stores iron, transferrin transports iron.

Explanation:
The proximal convoluted tubule reabsorbs nearly 100% of filtered glucose, amino acids, and vitamins via active and secondary active transport.

Explanation:
Thyroid-stimulating hormone (TSH) from the anterior pituitary binds to thyroid follicular cells, stimulating the release of T₃ and T₄.