The glial cells in the central nervous system that form scar tissue after central nervous system injury are the
A) astrocytes.
B) satellite cells.
C) oligodendrocytes.
D) microglia.
E) ependymal cells.
Answer: A
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Which of the following is not a function of the spleen?
A. It produces blood cells in the fetus. B. Its lymphocytes and macrophages monitor the blood for pathogens. C. It breaks down dead red blood cells and recycles useful components. D. It helps stabilize blood volume. E. It produces hormones that promote lymphocyte maturation.
The renin-angiotensin system in the kidneys helps to regulate:
A. heart rate. B. cardiac contractility. C. blood pressure. D. the release of ADH.
Nonfluent aphasia, due to a lesion in the ________, results in slow speech, difficulty in choosing words, or use of words that only approximate the correct word
A) Broca area B) Wernicke area C) cerebral lateralization D) primary auditory area E) primary motor area
In the fetus, blood can flow from the right atrium to the left atrium through the ________.
A. tricuspid valve B. foramen ovale C. ductus arteriosus D. ductus venosus