In humans, old, worn out erythrocytes are destroyed in the _____ and their replacements are derived from _____ residing in the _____
a. spleen; pluripotent stem cells; red marrow
b. spleen; embryonic stem cells; red marrow
c. red marrow; pluripotent stem cells; spleen
d. red marrow; embryonic stem cells; spleen
e. liver; pluripotent stem cells; red marrow
A
You might also like to view...
Which of the following muscles acts to flex the finger joints and wrist?
A) brachioradialis B) flexor digitorum C) flexor carpi ulnaris D) pronator teres E) flexor carpi radialis
Astrocytes are NOT involved in ________.
A. formation the blood-brain barrier B. uptake of NT from a synapse C. stimulation or inhibition neurons D. formation of synapses in the CNS E. breakdown and engulfment of foreign material in the CNS
Name the structures in the kidney that produce urine
A) collecting ducts B) nephrons C) major and minor calyces D) afferent and efferent arterioles
Which is correct about the contraction sequence of the heart?
A. The contraction and relaxation of all four chambers happen at the same time. B. The right atrium and ventricle contract at the same time, and as they are relaxing, the left atrium and left ventricle begin to contract. C. Contraction begins in the order: right atrium, then right ventricle, then left atrium, then left ventricle. D. The two atria contract at the same time, and as they are relaxing, the two ventricles contract together. E. The atria and ventricles begin their contractions at the exact same time, but the atrial contraction only lasts half as long as the ventricle contraction.