Explain the role of the pulmonary circuit in the human circulatory system and its significance for overall bodily function.

Q1: Explain the role of the pulmonary circuit in the human circulatory system and its significance for overall bodily function.
The pulmonary circuit carries deoxygenated blood from the heart to the lungs to pick up oxygen and release carbon dioxide, then returns oxygenated blood to the heart. Its significance is to oxygenate the blood for the entire body.

Based on the options provided:

• A. It delivers oxygen-rich blood to the body.
• B. It transports carbon dioxide from the body to the lungs.
• C. It delivers blood to the lungs for oxygenation.
• D. It regulates blood pressure throughout the body.

The most accurate option describing the primary role of the pulmonary circuit is C.

Answer: C. It delivers blood to the lungs for oxygenation.

Q2: What part of the heart powers the systematic circuit in the circulatory system?
The systemic circuit pumps oxygenated blood to the rest of the body. This function is performed by the left side of the heart, specifically the left ventricle.

Answer: B. Left side of the heart

Q3: What types of blood vessels are responsible for transporting blood away from the heart?
Arteries are the blood vessels that carry oxygenated blood away from the heart to the rest of the body (except for the pulmonary artery, which carries deoxygenated blood to the lungs).

Answer: C. Arteries

Q4: What is the primary function of capillaries in the circulatory system?
Capillaries are the smallest blood vessels and are the site where oxygen, nutrients, and waste products are exchanged between the blood and the body's tissues.

Answer: B. To facilitate gas and nutrient exchange

Q5: What is the function of Central Nervous System (CNS) and Peripheral Nervous System (PNS) in the Nervous System?

• i. CNS: The Central Nervous System (brain and spinal cord) processes sensory information, controls thoughts, coordinates voluntary and involuntary movements, and regulates bodily functions.
• ii. PNS: The Peripheral Nervous System connects the CNS to the rest of the body, including organs, limbs, and skin. It transmits sensory information to the CNS and carries motor commands from the CNS to muscles and glands.

Q6: State the correct name for the diagram shown below.
The diagram shows a cell with dendrites, a cell body, an axon, and a myelin sheath, which are all characteristic structures of a neuron.

Answer: Neuron

Q7: State the functions of the 3 neurons in the Nervous System.

• i. Sensory neuron: These neurons transmit sensory information from receptors (e.g., in the skin, eyes, ears) to the central nervous system.
• ii. Motor neuron: These neurons transmit signals from the central nervous system to muscles and glands, initiating movement or secretion.
• iii. Interneuron: These neurons connect sensory and motor neurons within the central nervous system, facilitating communication and complex processing.