You are a doctor examining a patient's blood test results. The patient's T cell count is low, and T cells that are present are not well developed. You are concerned that the patient will ______________
A. be susceptible to infection by all types of
bacteria.
B. have low antigen levels from decreased B
cell activity.
C. have strong allergies.
D. have a reduced ability to kill host cells if
they become infected.
E. develop cancer.
D
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In plants, the IP3/DAG pathways control the organism's responses to water loss and changes in light intensity
a. True b. False
Which of the following is NOT an example of a sex steroid hormone?
A. estrogen B. progesterone C. prolactin D. testosterone E. estradiol
Straight-chain oils are called:
a. aliphatic hydrocarbons. b. aromatic hydrocarbons. c. mixed hydrocarbons. d. ethyl oils. e. aromatic oils.
Answer the following statements true (T) or false (F)
1.The proteins needed to form blood clots are known as clotting factors. 2.The lymphatic system collects fluid that has leaked from blood capillaries, removes bacteria, and returns the cleansed fluid to the blood. 3.If a smoker deliberately held their respiration rate at the same level as a nonsmoker, the slowed diffusion of gas due to smoking-related damage could lead to decreased blood pH. 4.The interaction of blood pH, medulla, and carbon dioxide is an example of homeostasis. 5.The medulla has receptors that monitor H+ concentrations in the cerebrospinal fluid.