A) What is the role of the nervous system in digestion? (1 point)
to provide enzymes
to provide oxygen
to provide passage of nutrients throughout the body
to provide electrical signals to initiate peristalsis
The role of the nervous system in digestion is to provide electrical signals to initiate peristalsis.
A) Where does most of the absorption of nutrients occur? (1 point)
mouth
stomach
small intestine
large intestine
Most of the absorption of nutrients occurs in the small intestine.
A) The pizza that you ate for lunch is being digested. Summarize what happens to it in your stomach. (1 point)
Enzymes from the liver and pancreas break down fats and proteins in the pizza.
The pizza is mechanically broken up by teeth and mixed with saliva.
The waste materials are compacted and then removed from the body.
The pizza is churned, mixing it with digestive enzymes and gastric acid
In the stomach, the pizza is churned and mixed with digestive enzymes and gastric acid.
A) How does the nervous system influence the respiratory system? (1 point)
It regulates urine output.
It controls muscle contraction.
It stimulates defense against pathogens.
It regulates blood pressure.
The nervous system influences the respiratory system by controlling muscle contraction.
A) Which system comprises of skin, hair, and other parts of the outermost layer of the body? (1 point)
nervous system
endocrine system
integumentary system
lymphatic system
The system that comprises of the skin, hair, and other parts of the outermost layer of the body is the integumentary system.
The role of the nervous system in digestion is to provide electrical signals to initiate peristalsis.
Peristalsis is the rhythmic contraction of muscles in the walls of the digestive tract that helps propel food and waste through the system. These muscular contractions are initiated and controlled by the autonomic nervous system, a division of the peripheral nervous system. Specifically, the enteric nervous system, which is a network of nerves located in the walls of the digestive tract, plays a crucial role in coordinating peristalsis.
When food enters the digestive tract, sensory receptors in the walls of the tract detect its presence and send signals to the enteric nervous system. This triggers a series of nerve impulses that stimulate the contraction of the smooth muscles in the walls of the digestive organs, propelling the food along the digestive tract. This process ensures that the food is properly mixed, churned, and broken down, allowing for efficient digestion and absorption of nutrients.
So, the nervous system's role in digestion is to provide electrical signals that initiate peristalsis, helping to move food through the digestive system.