An increase in peristalsis is associated with activation of which of the following nervous systems?
Peripheral
Central
Parasympathetic
Sympathetic
The Correct Answer is C
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.
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Related Questions
Correct Answer is B
Explanation
A. While phagocytes move to areas of infection or damage, their primary role is not clumping together and adhering to tissues but rather engulfing and digesting foreign particles.
B. Phagocytes, such as neutrophils and macrophages, are white blood cells that ingest and digest foreign pathogens, dead cells, and debris in damaged tissues. This is their primary function in the immune response.
C. Releasing histamine is the function of mast cells, not phagocytes. Histamine is involved in initiating inflammation, but phagocytes are focused on clearing pathogens and debris.
D. Transporting oxygen is the function of red blood cells, not phagocytes. Phagocytes are involved in immune defense, not in the transport of oxygen.
Correct Answer is A
Explanation
A. Oogenesis is the process of meiosis that leads to the formation of egg cells (ova). It involves the reduction of chromosome number by half, resulting in haploid egg cells, which are essential for reproduction.
B. The ovaries are the organs where oogenesis takes place, but they are not the process itself. They contain the oocytes and other structures involved in female reproduction.
C. Oocytes are the immature egg cells present in the ovaries before they undergo meiosis and maturation during oogenesis. They are the precursors to mature egg cells but do not describe the process.
D. Ovulation is the release of a mature egg cell from the ovary, which occurs after oogenesis is complete and the egg is ready for fertilization, but it is not the process of meiosis itself.
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