Structure O is the
A) optic disc.
B) fovea.
C) blood vessels.
D) ocular muscle.
E) optic nerve.
A) optic disc.
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A) Embolism B) Polycythemia C) Anemia D) Thrombocytopenia E) Leukemia 41) Cancerous condition involving white blood cells. 42) Condition in which blood has abnormally low oxygen-carrying capacity. 43) Abnormal excess of erythrocytes resulting in an increase in blood viscosity. 44) Free-floating thrombus in the bloodstream. 45) Platelet deficiency resulting in spontaneous bleeding from small blood vessels.
Treatment of myxedema includes:
a. radiation. b. thyroxine replacement. c. iron replacement. d. calcium replacement.
Which statement is TRUE regarding antidiuretic hormone (ADH)?
A) ADH increases the permeability of the late distal tubule and cortical collecting ducts to water. B) ADH promotes water loss and increases urine output. C) ADH is secreted in response to low potassium ions in the blood. D) ADH causes the kidneys to produce very dilute urine.
A researcher discovered a sensory receptor that detects decreasing oxygen concentrations in the blood
According to the principles of negative feedback, it is likely that stimulation of this sensory receptor will produce which of the following types of responses? A. a decrease in heart rate B. an increase in the respiratory rate C. an increase in physical activity D. unconsciousness E. both a decrease in heart rate and an increase in the respiratory rate