Question

During exercise, sensory receptors detect changes in oxygen and carbon dioxide levels in the blood. This information is then sent to the brain's medulla, which causes the heart to beat faster and increases the rate of breathing. Exercising also causes the nervous system to signal the pancreas and thyroid gland to release hormones which regulate metabolism. Which statement is best demonstrated by this scenario? A. Nerves transmit and respond to every major system in the body. B. Increased heart rate and blood flow decrease oxygen supply. C. Exercise is important for the body to function properly. D. Hormones act as signal molecules between all body systems.

Answer 1

ANSWER: A. Exercise is important for the body to function properly.

Exercise  deliver adequate amounts of oxygen and remove waste from body tissues by regulating nervous, respiratory, circulatory and hormonal systems in the body. During exercise, body tissues and other metabolic processes in the body requires oxygen.Low levels of oxygen and higher levels of carbon dioxides are mainly detected by sympathetic division of the autonomic nervous system which control the physical activity of the body by increasing heart rate, blood pressure and respiration  as a result of this there is an increase in the amount of blood pumped per minute by the heart and oxygenated

Answer 2

Answer:

A. Nerves transmit and respond to every major system in the body.

Explanation:

Nerves are the part of the nervous system which is one of the major communication systems in the body. The given scenario shows that nerves transmit the information to the cardiovascular system (heart), respiratory system (breathing rate) and endocrine (release of hormones) system of the body to regulate the increased demand of oxygen and energy during exercise.