AP BIOLOGY

ANIMAL PHYSIOLOGY

EXCRETION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Ball-like mixture of food and saliva formed by the mouth before swallowing.
A
bolus
B
chyme
C
bile
D
feces
Explanation: 

Detailed explanation-1: -In digestion, a bolus (from Latin bolus, “ball") is a ball-like mixture of food and saliva that forms in the mouth during the process of chewing (which is largely an adaptation for plant-eating mammals). It has the same color as the food being eaten, and the saliva gives it an alkaline pH.

Detailed explanation-2: -Swallowing: Ingestion 2 The food is formed into a small ball called a bolus, which is pushed to the back of the mouth by the tongue. Involuntary muscle contractions in the pharynx then push the bolus down towards the oesophagus.

Detailed explanation-3: -bolus, food that has been chewed and mixed in the mouth with saliva.

Detailed explanation-4: -Abstract: The first step in the digestion process is mastication, or chewing, when food is broken down, lubricated with saliva, and formed into a cohesive mass known as the food bolus. Upon swallowing, the bolus moves to the stomach and undergoes further breakdown during gastric digestion.

Detailed explanation-5: -The food that gets chewed and mixed up with saliva is termed a bolus. The acidic fluid consisting of gastric juices and partly digested food that passes from the stomach to the small intestine is known as chyme.

There is 1 question to complete.