The __________ minimize(s) leakage of electrical current traveling along the axon
a. nodes of Ranvier c. myelin sheath
b. synaptic cleft d. soma
C
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Vicki is taking her morning walk when a strange dog appears in her path and begins to growl at her. Vicki's heart begins to race, the hair on her arms stands on end, and her palms begin to sweat as fear envelops her. These symptoms that Vicki is experiencing are due to the reactions of her __________ nervous system
a. sympathetic b. parasympathetic c. somatic d. central
Gonorrhea is transmitted by ____
a. skin to skin contact b. coughing or sneezing (droplet or aerosol) c. contact with blood and body fluids d. mucous membranes coming into contact with each other
In a national survey, girls reported significantly _______ free-time physical activity than boys
A) less B) more C) the same amount of D) reduced
Of the following, which statement best reflects how the environment affects individuals with a genetic risk of schizophrenia?
A. Mutations in the sperm cells of older fathers may be associated with developing positive symptoms of schizophrenia later in life. B. Altered gene expressions may give rise to brain abnormalities that are associated with schizophrenia. C. Family, twin, and adoption studies have consistently shown that schizophrenia has a high heritability. D. Stressors can trigger psychotic episodes, and social support can help to protect against relapses.