Answers 2024/2025| Approved
What is the primary function of the diaphragm in the respiratory system?
The diaphragm contracts to allow the lungs to expand and take in air during inhalation.
How does the liver contribute to the body's metabolism?
The liver processes nutrients from food, detoxifies harmful substances, and produces bile to
aid in fat digestion.
Which organ system is responsible for transporting oxygen and nutrients to cells throughout the
body?
The circulatory system is responsible for transporting oxygen, nutrients, and waste products
to and from the cells.
What process allows the kidneys to filter waste from the blood?
Filtration, reabsorption, and secretion in the nephrons allow the kidneys to filter waste from
the blood and form urine.
How does the pancreas regulate blood sugar levels?
The pancreas secretes insulin to lower blood sugar levels and glucagon to raise blood sugar
levels.
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, What is the role of the hypothalamus in maintaining homeostasis?
The hypothalamus regulates body temperature, hunger, thirst, and other autonomic processes
to maintain homeostasis.
Which organ is responsible for the exchange of gases between the blood and the atmosphere?
The lungs are responsible for the exchange of oxygen and carbon dioxide between the blood
and the atmosphere.
How do white blood cells protect the body from infection?
White blood cells identify, attack, and destroy pathogens such as bacteria and viruses,
helping the immune system fight infection.
In which organ does the digestion of proteins primarily begin?
The digestion of proteins primarily begins in the stomach, where enzymes like pepsin break
down proteins into peptides.
What is the function of synovial fluid in the joints?
Synovial fluid lubricates and cushions the joints, reducing friction and preventing wear on
bones during movement.
How do the villi of the small intestine aid in nutrient absorption?
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