Which of the following is involved in mechanical digestion of food?

A. Follicle Stimulating Hormone (FSH):FSH directly stimulates Sertoli cells in the testes to support sperm development and the process of spermatogenesis .
B. Luteinizing Hormone (LH):LH stimulates Leydig cells to produce testosterone, which indirectly supports spermatogenesis, but LH itself is not the primary regulator of the spermatogenic process.
C. Estrogen:Estrogen is present in males in small amounts (via aromatization of androgens) and has modulatory roles, but it is not the main hormone regulating spermatogenesis.
D. Progesterone:Progesterone has little to no direct role in regulating spermatogenesis in males.

A. Gallbladder:The gallbladder stores and concentrates bile and does not perform mechanical breakdown of food -not a mechanical breakdown structure.
B. Tongue:The tongue manipulates and positions food for chewing and helps form the bolus (mechanical processing) -contributes to mechanical breakdown (correct).
C. Teeth:Teeth chew and physically break food into smaller pieces (mastication), which is the primary start of mechanical digestion -directly responsible for mechanical breakdown (correct).
D. Stomach:The stomach performs mechanical churning and mixing of food (mechanical digestion) but it is not the beginning of mechanical breakdown -chewing in the mouth begins it.