The initial effect of a stimulus on a sensory receptor is a local electrical change specifically called a(an) ________.
A. local potential
B. action potential
C. sensory potential
D. receptor potential
E. graded potential
Answer: D
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Which of the following descriptions best matches the term basilar membrane?
A) moves up and down due to currents in the perilymph B) transmits movement of the tympanic membrane to the inner ear C) supports the olfactory organ D) tiny duct necessary for the static sense of equilibrium E) covers over the oval window
Regarding its role as a neurotransmitter in the CNS, norepinephrine
A. is secreted by brainstem neurons in response to sensory stimulation. B. amplifies weak sensory signals and dampens strong ones so that more information can reach conscious levels. C. is important for maintaining directed attention. D. both "is secreted by brainstem neurons in response to sensory stimulation" and "is important for maintaining directed attention" are correct. E. All of the choices are correct.
Which of the following accurately describes the relationship between the hypothalamus and pituitary gland?
A. The hypothalamus and pituitary gland are not physically connected, but instead communicate through the blood via hormones. B. Hypothalamic regulatory hormones pass to the anterior pituitary via blood vessels. C. Neurons originating in the hypothalamus store their hormones, ADH and oxytocin, in the anterior pituitary. D. The network of blood vessels connecting the hypothalamus and pituitary gland is called the hypothalamo-hypophyseal tract.
The results of the temperature experiment suggest that there is a greater concentration of cold receptors than warm receptors in the skin.
Answer the following statement true (T) or false (F)