The vessel that receives blood from the head, neck, chest, shoulders, and arms is the
A) internal jugular vein.
B) external jugular vein.
C) superior vena cava.
D) inferior vena cava.
E) coronary sinus.
C
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Which of the following does NOT directly affect the rate of diffusion of a substance across a membrane?
a. concentration gradient b. cellular volume c. permeability of the membrane to the diffusing substance d. surface area across which diffusion is taking place e. molecular weight of the diffusing substance
Mucus is moved along the lining of the trachea by extensions from cell membranes known as
A. flagella. B. microvilli. C. cilia. D. stereovilli.
Which statement is true regarding pseudo-stratified ciliated columnar epithelium?
A) It is well-suited for extreme stretching. B) It contains only one layer of cells. C) Its cells are predominantly cube shaped. D) It consists of many layers of cells.
What type of connective tissue contains thick bundles of collagen that run in random directions?
What will be an ideal response?