Alexandro is 14 years old and beginning to experience the physical changes of puberty. He is a little embarrassed because he has rapidly outgrown his clothes, his voice sometimes breaks or cracks, and he has new hair appearing on his chin and face
These features are all
A) secondary sex characteristics.
B) estrogens.
C) gateway drugs.
D) STDs.
A) secondary sex characteristics. Secondary sex characteristics are physical features that do not involve sexual reproduction, such as facial and body hair, voice, and muscles.
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Complete severation of the spinal cord at the cervical level results in
A. quadriplegia B. paraplegia C. monoplegia D. septaplegia
Advancing age tends to lessen recall for events and experiences that require ____________ processing but not ______________ processing.
a. structural; effortful b. effortful; automatic c. automatic; phonological d. phonological; structural
A researcher wants to know whether writing an essay on a controversial topic will have an effect on the attitudes held by people. First, she administers an attitude survey that covers a number of topics, including electronic voting machines. She then randomly assigns subjects to write an essay either supporting or opposing electronic voting machines. One week later, she administers the same attitude survey and compares those responses to the responses from the first time the survey was administered. In this experiment, the independent variable (IV) is the ________.
a) attitude survey b) essay c) controversial topic d) students' attitudes
Which of the following statements is true of inflammation?
A) It is the primary function of the cardiovascular system. B) It is characterized by unpleasant sensations, such as hot flushes and night sweats. C) It leads to an increase in the brittleness and porosity of bones. D) It increases the supply of white blood cells that combat antigens at the points of damage.