06:38The Autonomic Nervous System: Sympathetic and Parasympathetic DivisionsProfessor Dave Explains461views10rank
Multiple ChoiceWhich stage of a reflex arc would be significantly different in a reflex that is initiated by the brain compared to a reflex that is initiated by the spinal cord?274views3rank
Multiple ChoiceWhich of the following reflexes is particularly important in maintaining balance and often accompanies the flexor reflex in weight-bearing limbs?830views
Multiple ChoiceIn a reflex arc, the muscle fiber or gland that responds to the efferent impulses is known as the __________.661views1rank
Multiple ChoiceIn a reflex arc, the __________ transmits afferent impulses to the central nervous system.1224views
Multiple ChoiceStretch reflexes would be hypoactive in all of the following conditions EXCEPT __________.671views
Textbook QuestionThe following are the steps involved in a neural reflex. 1. activation of a sensory neuron 2. activation of a motor neuron 3. response by an effector 4. arrival of a stimulus and activation of a receptor 5. information processing The proper sequence of these steps is (a) 1, 3, 4, 5, 2. (b) 4, 5, 3, 1, 2. (c) 4, 1, 5, 2, 3. (d) 4, 3, 1, 5, 2. (e) 3, 1, 4, 5, 2.97views
Textbook QuestionThe reflexes that control the most rapid, stereotyped motor responses to stimuli are (a) monosynaptic reflexes, (b) polysynaptic reflexes, (c) tendon reflexes, (d) extensor reflexes.96views
Textbook QuestionThe contraction of flexor muscles and the relaxation of extensor muscles illustrate the principle of (a) reverberating circuitry, (b) generalized facilitation, (c) reciprocal inhibition, (d) reinforcement.97views
Textbook QuestionPolysynaptic reflexes can produce far more complicated responses than can monosynaptic reflexes because (a) the response time is quicker, (b) the response is initiated by highly sensitive receptors, (c) motor neurons carry impulses at a faster rate than do sensory neurons, (d) the interneurons involved can control several muscle groups.172views
Textbook QuestionBowel and urinary bladder control involve spinal reflex arcs that are located in the sacral region of the spinal cord. In both instances, two sphincter muscles—an inner sphincter of smooth muscle and an outer sphincter of skeletal muscle—control the passage of wastes (feces and urine) out of the body. How would a transection of the spinal cord at the L1 segment level affect an individual's bowel and bladder control?99views
Textbook QuestionWhat is the structural and functional relationship between spinal nerves, skeletal muscles, and dermatomes?164views