Question

Which of the following changes take place when you begin to exercise?A. extensive vasodilation

B. a rise in sympathetic activity
C. increase in venous return
D. All of the above changes take place as you begin to exercise.

Answer 1

The correct answer is D. All of the above changes take place as you begin to exercise.

Step-by-step explanation:

Every time some type of physical activity is performed, there is a cardiovascular response to exercise. The physical effort that is exerted produces a sympathetic stimulation favoring the increase in heart rate and blood pressure, guaranteeing with this increase an adequate blood flow in all organic tissues.

On the other hand, during exercise the heart needs to supply its greater needs for oxygen, therefore, it increases the size of the vessels that carry blood, this is known as extensive vasodilation.

Answer 2

Option D.

Step-by-step explanation:

The body’s physiologic responses to episodes of aerobic and resistance exercise normally occur in the:

• musculoskeletal system
• cardiovascular system
• respiratory system
• endocrine system, and
• immune system.

Vasodilation refers to the widening of blood vessels, therefore, during exercise when there is an increase in blood pressure, it will result in extensive vasodilation.

During exercise, more blood is sent to the active skeletal muscles, and, as body temperature increases, more blood is sent to the skin, this therefore indicates an increase in venous return.

Sympathetic system is a division of autonomic nervous system that prepares the body for stress conditions, therefore during exercise, there will be a rise in sympathetic activity because the body is going through stress.