What produces colony-stimulating factors?
A. Bone marrow
B. Lymphocytes
C. Erythrocyte
D. Kidney
Answer: B
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Some cells contain large numbers of mitochondria while others have relatively few or none. This suggests that
A) cells with large numbers of mitochondria are short-lived. B) cells with large numbers of mitochondria have a high energy demand. C) cells with small numbers of mitochondria have a large ATP supply. D) cells with large numbers of mitochondria have a low energy demand. E) some cells are older than others.
If the parents are AA and aa, the offspring are all expected to be
A) sterile. B) Aa. C) AA. D) aa. E) either AA or aa.
Recall from the video the parts of a typical compound microscope. Drag the labels to identify the parts of the compound microscope. Not all labels will be used. 2
What will be an ideal response?
The Hering-Breuer reflex is a protective mechanism that:
A) terminates inhalation and prevents lung overexpansion. B) decreases pneumotaxic function during severe hypoxia. C) sends messages to the diaphragm via the phrenic nerves. D) allows the apneustic center to influence the respiratory rate.