Flashcards in human physiology Deck (95)
What is your food's final destination?
What must the the food do before it gets to the cell?
It must break it down
What are the three phases of nutrition?
What is ingestion?
Getting the food into the body
What is digestion?
Breaking down food particles to the size of molecules
What is egestion?
getting rid of undigested food
What are the two types of digestion?
What is mechanical digestion?
non chemical breaking down of food
ex: chewing, muscular contractions in the stomach
teeth break food down tongue moves, manipulation.
What is chemical digestion?
uses digestive enzymes to break down the food in ones stomach
What is enzymatic hydrolysis?
Enzymes and water are used to chemically digest food.
What is the chemical formula for the enzymatic hydrolysis?
food+zH20---enzyme---> food fragments
What is intracellular digestion?
takes place inside the cell
ex: Ameba digestion food in its food vacuole or when
the lysosomes merge with food to digest them
What is extra cellular digestion?
food digested outside the cell
ex: our food is digested in the small intestine
The location of the digestion occurring is either....
extracellular or intracellular.
How does food travel to you?
the tongue pushes down the food down the pharynx and to the esophagus
What is peristalsis?
a wave of muscular contractions
What is the peristalsis' work in the esophagus?
The muscles contract above the bolus and and relax once the bolus pushed down. This happens again and again.
What is reverse peristalsis?
What is the stomach?
large muscular pouch
What is inside the stomach?
100s of gastric glands, which produce gastric juice
What is gastric juice?
hydrochloric acid and mucus.
What is a gastric ulcer?
caused by too much HCL
What happens after you throw up?
your esophagus burns because the HCL comes up with the food and there is not enough mucus to protect them
What is hunger?
The part of the brain interacting with the amount of sugar in your body.
How is hunger controlled?
It is controlled by your brain.
What is the hypothalamus?
The part of the brain that controls hunger
What is sassation?
The high levels of glucose that stimulate the brain, and you feel "full".
What happens when you have low levels of glucose?
you feel hungry
What is the salivary duct?
a tube that carries the saliva from the gland to your mouth