1. What is the primary function of the respiratory system?
a) To regulate body temperature
b) To transport nutrients and hormones
c) To exchange gases between the body and the environment
d) To filter and eliminate waste products from the blood
Answer: c) To exchange gases between the body and the environment
2. Which of the following structures is the basic functional unit of the kidney?
a) Nephron
b) Alveolus
c) Glomerulus
d) Loop of Henle
Answer: a) Nephron
3. The SA node in the heart is responsible for:
a) Regulating blood pressure
b) Pumping blood into the aorta
c) Initiating the electrical impulses that set the heart rate
d) Controlling the opening and closing of heart valves
Answer: c) Initiating the electrical impulses that set the heart rate
4. Which of the following hormones is produced by the pancreas and regulates blood sugar levels?
a) Insulin
b) Glucagon
c) Thyroxine
d) Cortisol
Answer: a) Insulin
5. The central nervous system consists of which of the following components?
a) Brain and spinal cord
b) Brain and peripheral nerves
c) Spinal cord and sensory receptors
d) Peripheral nerves and sensory receptors
Answer: a) Brain and spinal cord
6. Which muscle is primarily responsible for inspiration during breathing?
a) Intercostal muscles
b) Diaphragm
c) Abdominal muscles
d) Pectoral muscles
Answer: b) Diaphragm
7. The largest organ in the human body is:
a) Liver
b) Skin
c) Heart
d) Lungs
Answer: b) Skin
8. What is the function of red blood cells (erythrocytes)?
a) Fighting infections
b) Clotting blood
c) Carrying oxygen to body tissues
d) Regulating blood pressure
Answer: c) Carrying oxygen to body tissues
9. Which part of the brain is responsible for coordinating voluntary movements and maintaining balance?
a) Cerebrum
b) Cerebellum
c) Medulla oblongata
d) Thalamus
Answer: b) Cerebellum
10. The small intestine is primarily involved in:
a) Absorption of nutrients
b) Storage of waste
c) Production of digestive enzymes
d) Filtering toxins from the blood
Answer: a) Absorption of nutrients
