Which of the following is not true of graded potentials?
A) They are short-lived.
B) They can form on receptor endings.
C) They increase amplitude as they move away from the stimulus point.
D) They can be called postsynaptic potentials.
C) They increase amplitude as they move away from the stimulus point.
You might also like to view...
Answer the following statement(s) true (T) or false (F)
1. The human forelimb contains joints that confer a great deal of mobility as compared to the hindlimb. 2. The female pubic arch is usually 90 degrees or less. 3. Condyles are found in the axial skeleton only. 4. Trochanters are unique to the femur. 5. The styloid process of the radius can be palpated proximal to the thumb.
Receptors for the general senses are found
A. widely distributed throughout the body. B. in a few clusters. C. throughout the visceral organs. D. only in the integumentary system.
Active sites on the actin become available for binding after
A) actin binds to troponin. B) troponin binds to tropomyosin. C) calcium binds to troponin. D) calcium binds to tropomyosin. E) myosin binds to troponin.
Which of the following statements about voltage-gated sodium channels is true?
a. All cells contain voltage-gated sodium channels. b. Voltage-gated sodium channels are integral membrane proteins. c. Voltage-gated sodium channels have roughly equal permeability to Na+ and K+. d. Voltage-gated sodium channels open in response to any change in membrane potential. e. Voltage-gated sodium channels open in response to binding of acetylcholine.