nervous system
What is the main function of the nervous system?
To send and receive messages throughout the body.
What type of blood vessel carries blood away from the heart?
Arteries.
What is the function of mitochondria?
generate large quantities of energy
What is the main function of the respiratory system?
to facilitate gas exchange
Where does digestion begin?
In the mouth.
What carries messages from the brain to the body and back?
Nerves.
Which blood cells help fight infections?
White blood cells.
how many types of cells are there?
200
What is the windpipe also called?
The trachea.
How does food move through your digestive tract?
a process called peristalsis
what are the two most common signals?
Touch signals and Pain signals
Which side of the heart pumps blood to the lungs?
The right side.
What is the largest cell in the human body?
female egg cell
how can smoking affect the respiratory system?
killing cells, destroying the air sacs in the lungs, and paralyzing the tiny hairs that protect the airways
Which organ produces bile?
the Liver
Which part of the brain controls thinking and memory?
The cerebrum
How does the nervous system regulate heart rate?
increases and decreases heart rate and contractility.
how does a cell become a cancer cell?
gene mutations
What is the size of the lungs?
roughly the size of a hand
Why doesn’t the small intestine digest itself despite having powerful enzymes?
Mucus secretion
What would happen if the corpus callosum were severed?
Communication between the brain’s hemispheres would be impaired.
How would a blockage in the coronary arteries affect the heart?
Chest pain and a Potential heart attack
How many cells are in the human body?
40 trillion
Where does gas exchange take place?
in the alveoli within the lungs
Where does most chemical digestion occur?
Small intestine