When the neural impulse reaches the axon terminals, the vesicles release varying amounts of
a. electrical impulses. c. electrochemical substances.
b. hormones. d. neurotransmitters.
D
You might also like to view...
The different degrees of sleep and wakefulness through which newborns cycle, ranging from deep sleep to great agitation, are called what?
A. social interactions B. consciousness C. states of arousal D. attentiveness
In psychosexual theory, which of the following terms refers to reality-oriented functions such as perception, learning, memory, and judgment?
a. Superego b. Ego c. Id d. Unconscious
Regarding statistics, which of the following statements is FALSE?
a. Statistics help us draw valid conclusions about what we have observed. b. Statistics bring greater clarity and precision to psychological thought and research. c. There are two major types of statistics: frequency and graphical. d. Psychologists use statistics because they often have to base decisions on a limited amount of data.
Samantha is about to hand Megan a notebook that contains her biological psychology notes. Which of the following correctly describes how Megan's muscles will react to the heavy notebook?
A. The weight of the notebook will cause Megan's arm muscles to contract. This information will be sensed by mechanoreceptors around her joints and sent to her spinal cord via Ib fibers. The Ib fibers will excite gamma motor neurons, which will cause her arm to contract further to adjust to the heavier weight of the book. B. The weight of the notebook will cause Megan's arm muscles to stretch. This information will be sensed by her spindles and sent to her spinal cord by gamma motor neurons. The gamma motor neurons will inhibit the alpha motor neurons, causing her arm muscles to relax enough that she won't drop the book. C. The weight of the notebook will cause Megan's arm muscles to contract. This information will be sensed by her Golgi tendon organs and sent to her spinal cord by Ib sensory fibers. The Ib sensory fibers will excite alpha motor neurons that will cause her arm muscles to stretch enough that she won't drop the book. D. The weight of the notebook will cause Megan's arm muscles to stretch. This information will be sensed by her spindles and sent to her spinal cord by Ia sensory fibers. The Ia sensory fibers will excite alpha motor neurons that will cause her arm muscles to contract enough that she won't drop the book.