Which of the following is a membrane protein that permits ion passage into or out of a cell?
Vesicle
Enzyme
Channel
Lysosome
The Correct Answer is C
A. A vesicle is involved in the transport of substances within or out of the cell via processes like endocytosis or exocytosis but does not directly permit ion passage across the membrane.
B. An enzyme catalyzes chemical reactions and is not directly involved in the transport of ions across the cell membrane.
C. A channel protein facilitates the passage of ions across the cell membrane, allowing specific ions to move in and out of the cell based on concentration gradients.
D. A lysosome is an organelle responsible for digesting and breaking down waste materials within the cell, not for ion transport across the membrane.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. The larynx, also known as the voice box, contains the vocal cords. The vocal cords vibrate to produce sound when air passes through them, allowing for speech and other vocalizations.
B. The pharynx is the passageway that connects the mouth and nose to the larynx and esophagus. It does not contain the vocal cords.
C. The trachea is the windpipe that conducts air to and from the lungs. It does not contain the vocal cords but is located just below the larynx.
D. The epiglottis is a flap of tissue that covers the opening of the larynx during swallowing to prevent food from entering the airway. It does not contain the vocal cords
Correct Answer is C
Explanation
A. When the inspiratory muscles contract, the length of the thoracic cavity actually increases, not decreases, as the diaphragm moves downward and the ribs expand.
B. When the diaphragm contracts (during inspiration), it moves downward into the abdomen, not upward.
C. The correct action is that the contraction of the inspiratory muscles (including the diaphragm and external intercostals) increases the diameter of the thoracic cavity, allowing for the expansion of the lungs to draw in air.
D. The chest cavity does not compress the lungs during inspiration; rather, it allows for the lungs to expand as air is drawn in.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.