bio rev quiz 23
Which of the following statements about the amino acids that are required by adult humans is true?
Amino acids are the building blocks of proteins.
Which of the following statements about cardiac muscle is true?
Cardiac muscle contains bands like skeletal muscle, but its contractions are involuntary like smooth muscle.
In what way is the structure of the small intestine related to its function?
Finger-like villi increase the surface area available for absorption.
Which of the following correctly describes the skeletal system?
The axial skeleton is designed primarily for support and protection of vital organs.
If an athlete damages a ligament in his or her knee, he or she has damaged
a connection between two bones.
The knee is part of the ________ skeleton, which is designed primarily for ________.
appendicular; motion
As an experiment, a person who wishes to avoid getting ill during the winter significantly boosts his or her vitamin intake by taking multiple vitamin supplements. This action could
be dangerous, because the human body needs vitamins only in small amounts.
Which nutrient has the highest energy content per gram?
fats
Bile is produced in the ______ and secreted into the small intestine by the ______.
liver; gallbladder
The first enzymes that food encounters in our body are in our
mouth
When you eat an apple, your body breaks down the tissues of the apple and absorbs the nutrients. What is the correct path an apple would take through your digestive system?
mouth, stomach, small intestine, large intestine
The advantage of chewing food is that this process
provides mechanical digestion and increases the surface area of the food for further digestion.
Minerals are
required by the human body in small amounts.
The power that moves food along your esophagus comes from
smooth muscle
In the human digestive system, chemical digestion of protein begins in the
stomach
Food passing through our digestive tract would contain the fewest nutrients when it reaches which of the following organs?
the large intestine
How rapidly an organism can absorb nutrients generally depends on
the surface area available for absorption.
Bending your elbow involves
the use of voluntary muscles.