The absolute refractory period of an excitable membrane roughly corresponds to the period when sodium channels are opening and inactivated.
Answer the following statement true (T) or false (F)
True
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Which of the following does NOT contribute to the longer lasting and more widespread effects observed with sympathetic activation versus parasympathetic activation?
a) Norepinephrine is more slowly removed from synapses than ACh. b) Additional norepinephrine is released from the adrenal gland. c) Greater divergence occurs in sympathetic neural pathways. d) Blood flow to the hypothalamus is decreased when sympathetic activation occurs.
What is the insertion of the muscle labeled F?
a) ulnar tuberosity and coronoid process of ulna b) radial tuberosity of radius and bicipital aponeurosis c) olecranon of ulna d) lateral border of distal end of humerus e) lateral epicondyle of humerus
Which disorder is characterized by an exaggerated response of the sympathetic division of the ANS that occurs in most individuals with spinal cord injury at or above T6?
a) Raynaud's phenomenon b) Autonomic dysreflexia c) Reflex sympathetic dystrophy d) Diabetic neuropathy e) Horner's Syndrome
What is the earliest sign of puberty in girls?
A) The first menstrual period B) The appearance of pubic and axillary hair C) The onset of breast development D) The increase in muscle mass E) The appearance of sebaceous and axillary glands