The ectoderm forms which of the following?
A) muscle
B) all lymphatic structures
C) the cardiovascular system
D) the thymus, thyroid gland, and pancreas
E) all neural tissues
E) all neural tissues
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Blood supply to the face is provided primarily through the:
A) temporal artery. B) vertebral artery. C) internal carotid artery. D) external carotid artery.
Which is typically more important in regulating the respiratory system, PO2 or PCO2? Explain your answer and briefly discuss the receptors involved. Give examples of situations in which each of those factors changes enough to stimulate a reflex. How and why are these factors related to each other?
What will be an ideal response?
Melanin serves to protect cells in the deeper layers of the epidermis from
A) discoloration. B) melanocyte activity. C) albinism. D) ultraviolet radiation. E) keratin production.
The gastrocnemius inserts on the
A. tibia. B. calcaneus. C. femur. D. phalanges.