________ are large lymphoid nodules that are located in the walls of the pharynx.
A) Lymph nodes
B) thymic corpuscles
C) Thymus glands
D) Tonsils
E) Peyer's patches
D) Tonsils
You might also like to view...
Blood flow is affected by
a. pressure differences b. the viscosity of the blood c. the amount of friction in the blood vessels d. the length and diameter of the blood vessels e. all of the above
Which statement about tropic hormones is incorrect?
a. They may stimulate the secretion of other hormones. b. They target other glands. c. They are all produced in the anterior pituitary gland. d. Both a and b e. All of the above
Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. How do you suppose these drugs work?
A. They prevent calcium from entering cardiac muscle, thus slowing down the heart rate. B. They prevent calcium from entering smooth muscle, thus allowing the muscle to relax. C. They prevent calcium from entering the sarcoplasmic reticulum of smooth muscle. D. They prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle. E. They stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin.
____________________ and _____________________ are specialized cells.?
Fill in the blank(s) with correct word