Which structure is responsible for transmitting nerve impulses from the peripheral nervous system to the central nervous system?
Motor neurons
Sensory neurons
Glial cells
Interneurons
The Correct Answer is B
A. Motor neurons: Motor neurons carry impulses away from the central nervous system to muscles and glands. They are responsible for initiating movement and responses, not for transmitting sensory information to the CNS.
B. Sensory neurons: Sensory neurons transmit nerve impulses from sensory receptors in the peripheral nervous system to the central nervous system. They convey information about touch, pain, temperature, and other stimuli for processing and response.
C. Glial cells: Glial cells support and protect neurons, maintain the extracellular environment, and assist with nutrient supply. They do not directly transmit nerve impulses but are essential for proper neuronal function.
D. Interneurons: Interneurons are located within the central nervous system and connect sensory and motor neurons. They process information and coordinate responses but do not transmit impulses from the PNS to the CNS.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Transport blood from the lungs to the heart: This is the role of the pulmonary veins, which carry oxygenated blood from the lungs to the left atrium, not the coronary arteries.
B. Supply oxygenated blood to the myocardium: Coronary arteries branch from the aorta and deliver oxygen-rich blood directly to the heart muscle, ensuring the myocardium receives the nutrients and oxygen required for continuous contraction.
C. Pump blood into the systemic circulation: Pumping blood into the systemic circulation is the function of the left ventricle, not the coronary arteries.
D. Remove carbon dioxide from the cardiac tissue: While venous drainage removes metabolic waste, this is primarily the role of coronary veins, not the coronary arteries.
Correct Answer is D
Explanation
A. Cranial cavity: The cranial cavity houses the brain and associated structures. It does not contain organs responsible for digestion, so it is not involved in the digestive system.
B. Thoracic cavity: The thoracic cavity contains the heart and lungs within the ribcage. While it is critical for respiration and circulation, it does not house the primary organs of digestion.
C. Pelvic cavity: The pelvic cavity contains the bladder, reproductive organs, and the rectum. While part of the lower digestive tract (rectum) is present here, the majority of digestive organs are located in the abdominal cavity.
D. Abdominal cavity: The abdominal cavity contains the major digestive organs, including the stomach, liver, pancreas, intestines, and gallbladder. It provides the primary space for digestion and nutrient absorption.
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