Which of the following is a neurotransmitter that is able to bind to a muscle cell receptor and produce an action potential?
Acetylcholine
Calcium
Adenosine triphosphate
Sodium
The Correct Answer is A
a. Acetylcholine: This is the primary neurotransmitter at neuromuscular junctions. It binds to receptors on muscle cells (specifically nicotinic acetylcholine receptors) and triggers an action potential, leading to muscle contraction.
b. Calcium: While calcium ions are essential for muscle contraction, they are not neurotransmitters. Instead, they play a role in the release of acetylcholine from the nerve terminal and in the contraction process within muscle cells.
c. Adenosine triphosphate (ATP): ATP is the primary energy carrier in cells but is not a neurotransmitter. It is crucial for muscle contraction, as it provides the energy for various steps in the contraction cycle.
d. Sodium: Sodium ions are involved in generating action potentials and depolarizing muscle cells, but they are not neurotransmitters.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
a. Prothrombin: This is a protein involved in blood clotting, not in maintaining colloid osmotic pressure.
b. Globulins: These are involved in immune responses and transportation of substances but are not the primary proteins for colloid osmotic pressure.
c. Fibrinogen: This is a clotting factor that helps in blood coagulation, not in colloid osmotic pressure.
d. Albumin: Albumin is the main plasma protein responsible for maintaining colloid osmotic pressure, which helps to keep fluid within the blood vessels.
Correct Answer is B
Explanation
a. Stratum granulosum: This layer is composed of keratinocytes that are in the process of dying and forming a barrier of keratin.
b. Stratum basale: This is the deepest layer of the epidermis, where keratinocytes are actively dividing. This layer contains stem cells that produce new keratinocytes to replace those shed from the surface.
c. Stratum lucidum: This layer is only present in thick skin, such as on the palms and soles, and consists of dead keratinocytes that have a translucent appearance.
d. Stratum spinosum: This layer contains keratinocytes that are beginning to produce keratin and other proteins but are not rapidly dividing.
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.