Question

after six months of lifting weights at the gym, you notice that some of your muscles have increased in size. this increase in size is due to __________ of muscle cells.
neoplasia
hypertrophy
atrophy
hyperplasia
question 9 (1 point)
with regard to the healing of a skin wound, macrophages ____________.
release histamine to increase blood flow to the area
produce and secrete collagenous fibers
phagocytize and digest pathogens and tissue debris
stimulate epithelial cells to multiply
make capillaries more permeable allowing white blood cells to migrate into the area
question 10 (1 point)
the replacement of damaged tissue with scar tissue is called __________.
ecrosis
aoptosis
regeneration
fibrosis

Explanation:

• For the first question, muscle - cell size increase after weight - lifting is due to hypertrophy, which is an increase in cell size. Neoplasia is abnormal new growth, atrophy is cell size decrease, and hyperplasia is an increase in cell number.
• For the second question, macrophages phagocytize and digest pathogens and tissue debris during wound healing. Histamine is released by mast cells, fibroblasts produce collagen, growth factors stimulate epithelial cell multiplication, and vasoactive substances make capillaries more permeable.
• For the third question, the replacement of damaged tissue with scar tissue is called fibrosis. Necrosis is cell death, apoptosis is programmed cell death, and regeneration is the replacement of damaged tissue with the same type of tissue.

Answer:

• Question 1: B. hypertrophy
• Question 2: C. phagocytize and digest pathogens and tissue debris
• Question 3: D. fibrosis