What are somites?
a. neural tissue that gives rise to the cranial nerves
b. neural tissue that give rise to the peripheral nerves
c. neural tissue that gives rise to the two hemispheres of the brain
d. mesoderm tissue that gives rise to the bones and skeletal muscles of the trunk
e. mesoderm tissue that gives rise to the smooth muscles of the heart and lungs
ANSWER: d
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The ____ is responsible for making the lipids that form the cell’s membranes
a. rough ER b. smooth ER c. Golgi body d. peroxisomes e. mitochondria
How does fever help fight infection as part of the innate defense?
A. Fever inactivates (kills) some viruses. B. Fever speeds up the rate of phagocytosis. C. Fever reduces the iron level in the blood, thereby retarding the growth of some bacteria. D. Fever kills some bacteria. E. All of the answer choices are correct.
What type of leucocytes first appear at site of microbial invasion?
A. Macrophages B. Neutrophils C. B lymphocytes D. Eosinophils E. T lymphocytes
The polymerase chain reaction (PCR) can be used to produce ________ of copies in a few hours.
A. billions B. hundreds C. millions D. thousands