CH 16 Test Prep 16-30

B

19) The descending pathway a) controls sensory functions. b) consists of upper and lower motor neurons. c) consists of neurons located completely within the spinal cord. d) begins in the spinal cord and ends in the brain. e) is only involved with involuntary muscle movements.

A

20) Which of the neurons in the diagram would most likely pick up an itch sensation? a) A b) B c) C d) Both A and B e) A, B, C

C

24) Which structure in the diagram is sensitive to low vibrational frequencies and typically located in areas that lack hair? a) A b) B c) C d) D e) E

D

25) Which structure monitors the stretching of skin during a physical therapy session? a) A b) B c) C d) D e) E

C Thalamus Primary somatosensory area of the cerebral cortex

28) In this diagram neuron [dropdown 1] is a third order neuron and conducts impulses from the [dropdown 2] to the [dropdown 3]. Dropdown 1 choices: A B C Dropdown 2 choices: thalamus peripheral somatic receptors brain and spinal cord Dropdown 3 choices: primary somatosensory area of the cerebral cortex brain or spinal cord thalamus

A Peripheral somatic receptors Brain or spinal cord

29) In this diagram neuron [dropdown 1] is a first-order neuron and conducts impulses from the [dropdown 2] to the [dropdown 3]. Dropdown 1 choices: A B C Dropdown 2 choices: thalamus peripheral somatic receptors brain and spinal cord Dropdown 3 choices: primary somatosensory area of the cerebral cortex brain or spinal cord thalamus A Peripheral somatic receptors Brain or spinal cord

A, D, E, G

30) Why would neuron B in the diagram be considered a second-order neuron? Select all that apply. a) Decussation occurs b) Second-order neurons relay information from the thalamus to the cerebral cortex c) Second order neurons detect stimuli such as touch, vibration, and proprioreception. d) Second-order neurons travel in white matter pathways e) Second order neurons end in the thalamus. f) Second order neurons connect somatic receptors with the spinal cord g) Cell bodies of the second order neurons are located in the gray matter of spinal cord