Question

question 19 (2.5 points)
why are adhering junctions common in tissues subject to constant abrasion or stretching, such as skin?
these cells need to communicate by allowing cytoplasm to flow between adjacent cells
the cells in these tissues require strong cell - to - cell junctions to hold them together
adhering junctions prevent harsh enzymes from flowing between adjacent cells
these tissues do not have basement membranes
adhering junctions allow production of a protective cuticle
question 20 (2.5 points)
the double membrane of mitochondria contains the atp - making machinery, therefore, this is where ____ would be found
proteins and enzymes required for aerobic respiration

Explanation:

Question 19

Adhering junctions are cell - to - cell junctions. In tissues like skin that face abrasion or stretching, cells need to be held together strongly. Adhering junctions (e.g., desmosomes) provide mechanical strength by connecting the cytoskeletons of adjacent cells.

• Option 1: Allowing cytoplasm to flow between cells is a function of gap junctions (for communication), not adhering junctions.
• Option 3: Preventing harsh enzymes from flowing is more related to tight junctions (which form a seal), not adhering junctions.
• Option 4: Skin (epithelial tissue) has a basement membrane.
• Option 5: Adhering junctions do not directly allow for the production of a protective cuticle.

Aerobic respiration (which produces ATP) has key steps like the citric acid cycle (in the mitochondrial matrix, part of the inner - membrane system) and the electron - transport chain (in the inner mitochondrial membrane). Proteins and enzymes for these processes are located in the mitochondrial double - membrane system (including the inner membrane and the matrix, which is enclosed by the inner membrane).

Answer:

The cells in these tissues require strong cell - to - cell junctions to hold them together

Question 20