HUMAN BIOLOGY
• Human organ systems interact to perform life
functions that maintain homeostasis.
Digestive System
• How does the action of
hydrochloric acid effect
digestion in the stomach?
Answer
Provides the proper pH
for pepsin (enzyme) to
work effectively
Circulatory System
• What is the function of
plasma, red blood cells,
white blood cells, and
platelets?
Answer
• Plasma: transports blood cells, wastes,
nutrients, antibodies, hormones, and
enzymes.
• Red blood cells: carries oxygen to the
body’s cells.
• White blood cells: fight infections.
• Platelets: involved in clotting of blood.
Circulatory System #2
• Describe the transport of
oxygen-poor blood from
body cells to lungs.
Answer
• Oxygen-poor blood from the
body returns to the right side
of the heart through two
large veins, it is then pumped
to the lungs. Waste gases are
removed and oxygen is
picked up at the lungs.
Respiratory System
• How does the exchange of
oxygen and carbon dioxide
take place in alveoli?
Answer
• Capillaries surround each
alveolus where oxygen (O2)
and carbon dioxide (CO2)
move by diffusion between
the alveolus and the
capillaries.
Urinary System
• What is the function of the
nephron?
Answer
• Nephrons are small filtering
units: some substances are
forced out of blood into the
nephrons and some
substances are put back into
the blood.
Nervous System
• Explain why the brain is
called the control center of
the nervous system.
Answer
• The three major parts of
the brain control specific
functions of the body.
QUICK REVIEW
•Please answer questions
#1- 8 in the packet.
•Transfer your answers to
the “lecture notes”
Human Reproduction
• What effects does the
production of testosterone
have on the male body?
Answer
• initiates sperm production
• Regulates the production
of secondary sex
characteristics
Female Reproduction
• What environmental
factors may harm the
embryo during the early
months of pregnancy?
Answer
• Smoking, drinking, taking
drugs, and exposure to
radiation can all lead to
developmental problems
with an unborn fetus.
QUICK REVIEW
•Please answer questions
#9- 15 in the packet.
•Transfer your answers to
the “lecture notes”
TEST YOUR KNOWLEDGE
Content questions for
Regents Exam practice