Homeostasis refers to:

• Constant change within the body

• Maintaining a stable internal environment

• The body’s ability to grow

• External environmental balance

Which system regulates hormones in the body?

• Nervous

• Endocrine

• Skeletal

• Respiratory

Negative feedback differs from positive feedback because:

• Negative feedback amplifies change

• Positive feedback is more common

• Negative feedback reduces the effect of a stimulus

• Positive feedback has no role in homeostasis

The plane dividing the body into right and left halves is:

• Frontal

• Sagittal

• Transverse

• Coronal

Which cavity contains the heart?

• Cranial cavity

• Thoracic cavity

• Abdominal cavity

• Pelvic cavity

A cation is:

• A negatively charged ion

• A positively charged ion

• Neutral

• An atom with extra neutrons

The pH of human blood is approximately:

• 5.5

• 6.8

• 7.4

• 8.1

The three most important polysaccharides are:

• Starch, glycogen, cellulose

• Glucose, sucrose, maltose

• Lipids, proteins, carbohydrates

• RNA, DNA, ATP

The function of the mitochondrion is to:

• Store DNA

• Produce ATP

• Synthesize proteins

• Detoxify chemicals

Passive transport differs from active transport because:

• Passive transport requires ATP

• Active transport moves substances along the concentration gradient

• Passive transport moves substances down the concentration gradient

• Active transport occurs only in nerve cells