How many food groups make up the Food Guide Pyramid?
Which of the following would NOT be found in the stomach?
What is one of the roles of the pancreas in nutrition?
What enzyme found in saliva breaks chemical bonds between the sugar monomers in starches?
Where does the process of chemical digestion begin?
What does mechanical digestion in the stomach involve?
a)Absorption of nutrients by villi
b)Pepsin and bile
c)Strong muscular contractions
d)Bile and pancreatic fluid
The stomach breaks down food into a soft partially digested mixture called
Through which structure do wastes pass into the rectum?
Water is extracted from digested food in the body primarily by the
The function of the excretory system is to control homeostasis and
a)Break down nutrients
The main organs of the excretory system are the
Which of the following is NOT part of a nephron?
a)Urethra renal vein
The activity of the kidneys is controlled by hormones and by the
a)Volume of nutrients
b)Volume of filtrate
c)Composition of the blood
d)Composition of the urine
When the kidneys detect an increase in salt, they respond by
a)Excreting less salt in urine
b)Returning more salt to the blood by filtration
c)Returning more salt to the blood by reabsorption
d)Returning less salt to the blood by reabsorption
Which of the following controls the activity of the kidneys?
a)The composition of the blood
b)Regulatory hormones that are released in response to the composition if blood
c)Both a and b
d)None of the above
What percentage of the filtrate’s water that enters Bowman’s capsule is reabsorbed into the blood?
d)Less than 25 percent
In the kidneys, both useful substances and wastes are removed from the blood by
The process of dialysis
a)Carries urine to the urinary bladder
b)Pumps blood throughout the body
c)Returns filtered blood to the body
d)Forces water into the cells and tissues by osmosis
Dialysis performs the function of the
What materials are removed from the blood through dialysis?
a)Urea and excess salts
c)Amylase and pepsin
d)None of the above