Is blood velocity faster or slower in the capillaries compared to the arteres? Explain.
What will be an ideal response?
Answer: Blood moves much slower in the capillaries. Even though the capillaries are very small, there are so many of them that the volume of the capillaries is much larger than the arteries. Total blood flow (liters/min) is the same throughout the arteries, capillaries and veins, so velocity must be lower if the volume is larger.
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The organelle level of organization includes which of the following concepts?
A. The study of organ systems working together to create organisms B. The study of atoms and how they form bonds C. The study of body structures and organs D. The study of cellular organelles and how they work together in a living cell
The figure illustrates a medial view of bones of the right foot. What does "E" represent?
A. Calcaneus B. Metatarsals C. Talus D. Fibula E. Tibia
Using Figure 7.3, match the following:
1) Anchor the pterygoid muscles.
2) Passageway for optic nerve.
3) Encloses hypophysis.
4) Forms parts of the middle cranial fossa, dorsal walls of the orbits, and external walls of the skull.
5) Allow cranial nerves that control eye movements to enter the orbit.
We enjoy sunbathing because it stimulates keratinocytes to release
A) collagen. B) keratin. C) beta endorphin. D) carotene.