A lymphocyte with no surface markers is called a(n) ________
A. null cell.
B. antibody.
C. suppressor cell.
D. blast cell.
E. antigen.
Answer: A
You might also like to view...
Answer the following statements true (T) or false (F)
1. Illicit drug use is more prevalent in rural counties than in urbanized counties. 2. Most individuals who abuse prescription drugs get them from a friend or relative for free. 3. The federal government, at this time, does not regulate the use of herbal remedies. 4. The route of administration may have a profound effect on the speed and efficiency with which a drug acts. 5. The effects of a drug are influenced by the characteristics of the situation or environment where the drug was taken.
The unit of DNA comprised of a combination of a deoxyribose molecule, phosphate
group, and nitrogeneous base is called a ________. Fill in the blanks with correct word
Which of the following is NOT a risk factor that might interfere with safe participation in exercise?
a. irregular heart rhythm b. abnormal blood pressure c. a resting heart rate of 64 beats per minute d. fainting
The point of contact between a motor nerve and an individual muscle fiber is the
A) fascicle. B) nerve impulse. C) neuromuscular junction. D) motor unit.