Skip to main content
Ch. 14 The Digestive System and Body Metabolism
Marieb - Essentials of Human Anatomy & Physiology 13th Edition
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Marieb 13th EditionCh. 14 The Digestive System and Body Metabolism문제 3
14장, 문제 3

More than one choice may apply.
The GI tube tissue layer responsible for the actions of segmentation and peristalsis is the
a. Serosa
b. Mucosa
c. Muscularis externa
d. Submucosa

검증된 단계별 안내
1
Understand the question: The problem is asking which tissue layer of the gastrointestinal (GI) tube is responsible for segmentation and peristalsis, which are movements that help mix and propel food through the digestive tract.
Define segmentation and peristalsis: Segmentation involves localized contractions that mix food with digestive enzymes, while peristalsis refers to wave-like contractions that propel food forward through the GI tract.
Review the structure of the GI tube: The GI tube has four main layers: mucosa (innermost layer), submucosa, muscularis externa, and serosa (outermost layer). Each layer has specific functions.
Focus on the muscularis externa: This layer contains smooth muscle arranged in two layers—an inner circular layer and an outer longitudinal layer. These muscle layers are responsible for the coordinated contractions that produce segmentation and peristalsis.
Eliminate incorrect options: The serosa is the outermost protective layer, the mucosa is involved in secretion and absorption, and the submucosa provides structural support and contains blood vessels and nerves. None of these are directly responsible for segmentation and peristalsis.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
2m
도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

GI Tract Layers

The gastrointestinal (GI) tract is composed of four main layers: the mucosa, submucosa, muscularis externa, and serosa. Each layer has distinct functions, with the muscularis externa playing a crucial role in the movement of food through the digestive system.
추천 영상:
가이드 코스
02:31
Epidermal Layers: Stratum Lucidum (Clear Layer)

Muscularis Externa

The muscularis externa is the layer of the GI tract responsible for the contractions that facilitate segmentation and peristalsis. It consists of two layers of muscle: an inner circular layer and an outer longitudinal layer, which work together to propel food along the digestive tract.
추천 영상:
6:17
Layers of the Stomach

Segmentation and Peristalsis

Segmentation and peristalsis are two types of muscular contractions in the GI tract. Segmentation involves rhythmic contractions that mix food with digestive juices, while peristalsis is a wave-like motion that moves food through the digestive system, ensuring efficient digestion and absorption.
추천 영상:
3:06
Motility in the Small Intestine
관련 실천
교과서 질문

Match the letter of the digestive organ shown in the figure with its function.

___ churning occurs here

932
views
교과서 질문

More than one choice may apply.

Which of the following terms are synonyms?

a. Gastrointestinal tract

b. Digestive system

c. Digestive tract

d. Alimentary canal

911
views
1
rank
교과서 질문

Match the letter of the digestive organ shown in the figure with its function.

___ produces bile

912
views
교과서 질문

Match the letter of the digestive organ shown in the figure with its function.

___ stores bile

851
views
교과서 질문

More than one choice may apply.

A digestive organ that is not part of the alimentary canal is the

a. Stomach

b. Liver

c. Small intestine

d. Large intestine

e. Pharynx

1199
views
2
rank