As a doctor, you discover a new virus that prevents the body from creating memory cells. Based on what you know about human defenses against disease, you predict that this virus is infecting and destroying which type of white blood cell?
A) Dendritic cells
B) Lymphocytes
C) Mast cells
D) Macrophages
E) Natural killer cells
B
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Y-linked traits are:
A. never inherited by females. B. never transmitted by females. C. transmitted only by carrier females. D. transmitted by affected fathers only to their sons. E. never inherited or transmitted by females, and are transmitted by affected fathers only to their sons.
During exponential growth, the ____ increases, while the ____ stays the same
Fill in the blank with the appropriate word.
Predict the effects of a drug that increases adrenocorticotropic hormone (ACTH) synthesis
A) increase in glucocorticoid production B) increase in release of corticotropin-releasing hormone (CRH) C) decrease in cortisol release D) decrease in release of corticotropin-releasing hormone (CRH)
Which statement is false?
A) Only animal cells contain DNA; plant cells do not. B) DNA can serve as an "individual identifier." C) With the exception of identical twins, every person's DNA is unique. D) DNA carries instructions for the functions of every cell and enzyme in the body. E) DNA carries a record of evolutionary history.