A person who is HIV-positive and has a helper T (TH) cell count lower than ________ has AIDS.
A. 5,000 cells/?L
B. 20,000 cells/?L
C. 50 cells/?L
D. 200 cells/?L
E. 1,000 cells/?L
Answer: D
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________ stimulates the thyroid gland to secrete thyroid hormones.
A. A releasing hormone from the anterior lobe of pituitary gland B. A releasing hormone from hypothalamus C. The nerve impulses from a nerve D. A releasing hormone from the posterior lobe of pituitary gland
A reflex that protects limbs by removing them from painful stimuli is the
A. stretch reflex. B. crossed extensor reflex. C. Golgi tendon reflex. D. alternating reflex. E. withdrawal reflex
When body temperature increases above the normal range, thermoreceptors in the skin and hypothalamus detect the increase in body temperature. The heat-loss center of the hypothalamus is activated, which sends signals to blood vessels and sweat glands. In
response, blood vessels in the skin dilate and sweat glands release sweat. Determine the part of this negative feedback loop that serves as the effector(s). A) hypothalamus B) thermoreceptors C) blood vessels and sweat glands D) body temperature
The posterior ridge on the shaft of the femur that serves as an attachment for numerous muscles is the ________.
Fill in the blank(s) with the appropriate word(s).