What direct effect do histamines and leukotrienes have on capillaries?
a. They decrease the diameter of capillaries.
b. They prevent phagocytes from sticking to the walls of capillaries.
c. They allow capillary walls to open and become leaky.
Ans: c. They allow capillary walls to open and become leaky.
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Which of the following statements does NOT describe eukaryotic cells?
a. Their cytoplasm consists of the cytosol and organelles. b. They possess a selectively permeable membrane. c. Their genetic material is localized in the cytoplasm. d. Their DNA is organized into chromosomes.
In humans, hemophilia is caused by a recessive allele on the X chromosome. Suppose a man with hemophilia has children with a healthy woman whose mother had hemophilia. What is the probability that their second child will have hemophilia? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)
Fill in the blank(s) with the appropriate word(s).
Which of the following defense cells are able to squeeze through the intact walls of capillaries into the tissues to attack and ingest invading microbes?
A) B cells B) Lymphocytes C) Phagocytes D) Mast cells E) Natural killer cells
A loss-of-function mutation in BAX proteins could eliminate apoptotic response in cell. Describe why this type of mutation is a passenger mutation and not a driver mutation
What will be an ideal response?