The muscles of facial expression insert into skin or other muscles, not bones.
Indicate whether the statement is true or false
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Question 2) Strong stimuli cause the amplitude of action potentials generated to increase.
Indicate whether the statement is true or false
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Question 3) The ________ is known as the boxer's muscle.
A) flexor digitorum longus
B) rectus abdominis
C) serratus anterior
D) biceps brachii
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Question 4) What does the central nervous system use to determine the strength of a stimulus?
A) size of action potentials
B) origin of the stimulus
C) type of stimulus receptor
D) frequency of action potentials
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Question 5) Which of the following is true about the movement of ions across excitable living membranes?
A) Ions always move actively across membranes through leakage channels.
B) Sodium gates in the membrane can open in response to electrical potential changes.
C) Ions always move from an area of higher concentration to an area of lower concentration.
D) Ions always move passively across membranes.
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Question 6) Muscles connecting to the hyoid bone are important for swallowing and speech.
Indicate whether the statement is true or false
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Question 7) These cells in the CNS have cilia that move in order to circulate cerebrospinal fluid ________.
A) ependymal cells
B) astrocytes
C) oligodendrocytes
D) Schwann cells
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Question 8) Which of the following is not true of graded potentials?
A) They increase amplitude as they move away from the stimulus point.
B) They can be called postsynaptic potentials.
C) They can form on receptor endings.
D) They are short-lived.
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Question 9) ________ is a powerful forearm extensor.
A) Triceps brachii
B) Brachioradialis
C) Brachialis
D) Biceps brachii
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Question 10) Neurons in the CNS are organized into functional groups.
Indicate whether the statement is true or false
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