Which cellular organelle is responsible for adenosine triphosphate (ATP) production?
Endoplasmic reticulum
Lysosome
Mitochondria
Ribosome
The Correct Answer is C
A. The endoplasmic reticulum (ER) is involved in the synthesis of proteins and lipids, but it is not responsible for ATP production.
B. Lysosomes are responsible for breaking down waste materials and cellular debris, but they do not play a role in ATP production.
C. Mitochondria are the powerhouses of the cell, where ATP is produced through cellular respiration. They convert nutrients into energy, making them the primary site for ATP production.
D. Ribosomes are responsible for protein synthesis, not ATP production. They are found in the cytoplasm and on the rough endoplasmic reticulum.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The peripheral nervous system is responsible for transmitting signals between the central nervous system and the rest of the body, but it does not directly govern the increase in peristalsis.
B. The central nervous system (CNS) processes information and coordinates responses but does not directly control the movement of the digestive system. The autonomic nervous system, which includes the parasympathetic and sympathetic divisions, controls peristalsis.
C. The parasympathetic nervous system is responsible for "rest-and-digest" activities. It stimulates peristalsis to promote digestion and the movement of food through the gastrointestinal tract, leading to an increase in peristalsis.
D. The sympathetic nervous system is involved in the "fight-or-flight" response, which inhibits digestive processes, including peristalsis, as the body prioritizes other functions.
Correct Answer is A
Explanation
A. The atrioventricular (AV) valves separate the atria from the ventricles. The right AV valve is called the tricuspid valve, and the left AV valve is the mitral valve. These valves ensure that blood flows from the atria into the ventricles without flowing back. This is the correct answer.
B. The pulmonary valve is located between the right ventricle and the pulmonary artery. It does not separate the atria and ventricles.
C. The aortic valve separates the left ventricle from the aorta and prevents blood from flowing back into the ventricle after contraction. It does not separate the atrial and ventricular chambers.
D. The semilunar valves, which include the pulmonary and aortic valves, are located at the exit of the ventricles but do not separate the atria from the ventricles.
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