When the body is overheated, the skin responds by
A) decreasing melanin production.
B) losing oxygen to surrounding tissues.
C) constricting blood vessels.
D) dilating blood vessels.
E) increasing keratin production.
D) dilating blood vessels.
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When there is an immediate requirement for increased oxygen to a particular body tissue in the systemic circuit,
A) Arterioles will dilate in that area. B) Capillaries will increase in number. C) Capillaries will decrease in size. D) Arterioles will constrict in that area.
Which of the following statements best describes how humans are infected by the malaria parasite?
A) In the hemolymph of the mosquito, the gametocytes mature, migrate to the salivary glands, and are injected into the host when the mosquito feeds. B) In the mosquito's digestive tract the parasite produces oocysts, which migrate to the salivary glands, and are injected into the host when the mosquito feeds. C) In the mosquito's digestive tract the parasite produces gametocytes, which migrate to the salivary glands, and are injected into the host when the mosquito feeds. D) In the mosquito's digestive tract the parasite develops into infective sporozoites, which travel to the salivary glands, and are injected into the host when the mosquito feeds.
You were the top student in your physiology class last semester. For this reason, your professor has asked that you prepare some lectures for her physiology class this semester. Specifically, she would like you to discuss the similarities and differences between the cardiovascular and respiratory systems, in terms of pressure gradients and fluid flow.
A. Explain how you will describe the role of the following structures: the pump and the tubes. B. Explain how you will describe the importance of an open vs. closed system and the relevant differences between liquids and gases. C. What is fundamentally different about the respiratory pump compared to the cardiac pump, and why does this difference exist?
What is the superior curvature of the uterus called?
A. Fundus B. Corpus C. Isthmus D. Infundibulum E. Body