Somatic and autonomic nervous system
Which of the following differentiates the somatic and autonomic systems of the peripheral nervous system from each other?
All nerves involved in the voluntary control of skeletal muscles are part of the somatic system, whereas body functions that are involuntary and controlled by signals that pass from the brain to glands and organs throughout the body are part of the autonomic system.
Which of the following accurately compares the direct and indirect pathways of motor signals?
Direct pathways extend from the motor area of the cerebral cortex, whereas indirect pathways originate in the brain stem,
The are a group of nuclei that surround the thalamus and regulate body movements by processing sensory and motor information coming from the cerebral cortex.
Basal ganglia
If you were explaining skeletal muscle contraction to a friend who doesn't understand the concept, your explanation should include all of the following except
Proteins within the muscle tissue release acetylcholine.
All of the following activities are controlled by the autonomic nervous system except
Skeletal muscle contractions.
All nerves involved in the voluntary control of skeletal muscles are part of the ______ system of the peripheral nervous system.
Somatic
Merkel cells are found in the
Stratum basale of the fingertips, lips, hands, and external genitalia.
Which of the following accurately explains the origins of sympathetic and parasympathetic nerves?
Sympathetic nerves arise from the thoracic and lumbar segments of the spinal cord, whereas parasympathetic nerves originate in the brain stem and the sacral spinal cord.
All of the following occur as part of the fight-or-flight response except
The heart rate decreases.
If you were giving an oral presentation on how somatic sensory signals are processed in the cerebral cortex, which of the following points would you make as part of your presentation?
The postcentral gyrus contains the primary somatosensory cortex and is responsible for spatial discrimination.