The acrosome of spermatozoa is developed from the ()
A. centriole
B. Golgi complex
C. mitochondria
D. smooth endoplasmic reticulum
E. lysosome
查看答案
Scanning electron microscope permits ()
A. small structures within cells or tissues
B. surface views of cells or organs
C. structures within nucleus
D. structures within organelles
E. structures within biomembrane
The commonest cells in loose connective tissue are ()
A. mast cells
B. undifferentiated cells
C. macrophages
D. fibroblasts
E. plasma cells
Which is characterized by their phagocytic abilities? ()
A. Fibroblast
B. Mast cell
C. Macrophage
D. Plasma cell
E. Adipose cell
Hyaline cartilage tissue does NOT contain ()
A. cells that can divide
B. ground substance
C. fibers
D. blood vessels
E. hyaluronic acid