BIO 210 Lecture Exam #4 Questions and Answers 100% Pass

BIO 210 Lecture Exam #4 Questions and Answers 100% Pass A posterior root contains A) sensory axons only B) motor axons only C) a mix of sensory and motor axons D) autonomic nervous system axons - Answer- A) sensory axons only The white matter of the spinal cord is surrounded by gray matter. A) True B) False - Answer- B) False If a patient experiences numbness in the boundaries of a dermatome, it is suggestive of damage to A) the somatosensory cortex B) the thalamus C) one of the spinal funiculi D) the anterior horn of grey matter in the spinal cord E) a spinal nerve - Answer- E) a spinal nerve The plexuses that lie on either side of the neck are the __________ plexus. A) cervical B) brachial C) lumbar D) radial E) mandibular - Answer- A) cervical The largest and longest nerve in the body is the __________ nerve. A) femoral B) radial C) sciatic D) obturator E) saphenous - Answer- C) sciatic Reflexes are described as A) slow and spontaneous B) spontaneous and self-initiating C) pre-programmed and voluntary D) rapid and involuntary - Answer- D) rapid and involuntary Usually, awareness of the stimulus occurs before a reflex action has been initiated. A) True B) False - Answer- B) False What is the correct order for the events that occur during a reflex? a: Impulse travels through sensory neuron to the CNS b: A stimulus activates a receptor c: Information is processed by interneurons d: Motor neuron transmits impulse to effector e: Effector responds A) a, b, c, d, e B) b, a, c, d, e C) c, b, a, e, d D) c, a, b, d, e E) b, d, c, a, e - Answer- B) b, a, c, d, e A reflex arc in which both the receptor and the effector organs of the reflex are on the same side of the spinal cord is A) monosynaptic B) polysynaptic C) ipsilateral D) contralateral E) None of the choices are correct - Answer- C) ipsilateral The simple knee-jerk reflex is an example of a(n) __________ reflex. A) ipsilateral B) contralateral C) monosynaptic D) crossed-extensor E) multisynaptic - Answer- C) monosynaptic The golgi tendon reflex A) helps to overcome pain B) aids in sending sensory information to the muscles C) prevents skeletal muscles from tensing extensively D) prevents muscles from contracting E) helps to gain balance through a complex series of muscular contractions - Answer- C) Prevents skeletal muscles from tensing extensively A diminished reflex response that may indicate damage to a segment of the spinal cord is a(n) __________ reflex. A) hypoactive B) hyperactive C) diminutive D) ponderous E) excessive - Answer- A) hypoactive Which type of reflex occurs with the smallest delay? A) Polysynaptic B) Monosynaptic - Answer- B) Monosynaptic The adult spinal cord extends inferiorly from the brain through the vertebral canal and ends at the level of the __________ vertebra. A) S4 B) L1 C) L6 D) S1 E) T8 - Answer- B) L1 The nerves projecting inferiorly from the spinal cord are collectively called the A) terminal finale B) cauda equina C) terminus filus D) caudal terminale E) caudus finalis - Answer- B) cauda equina In the brain, the outer cerebral cortex consists of gray matter, but in the spinal cord, gray matter is confined to the innermost regions. A) True B) False - Answer- A) True Consider a basketball player whose heart is racing during the final moments of a game. With seconds on the clock, she makes a jump shot. Her excitement is a function of her ________ nervous system, and her movements are a function of her _______ nervous system. A) parasympathetic, sympathetic B) sympathetic, parasympathetic C) somatic, sympathetic D) sympathetic, somatic E) somatic, parasympathetic - Answer- D) sympathetic, somatic Which of the following is correct about the autonomic nervous system (ANS)? A) The ANS is part of both the CNS and the PN