Why Would Stroke Volume Increase During Exercise

question 27

Multiple Choice

Why would stroke volume increase during exercise?
I.Parasympathetic discharge increases cardiac contractility
II.Vasodilation of working muscles increases venous return to the heart
III.Vascoconstriction of peripheral venous blood reservoirs increases venous return

• A) II and III only
• B) I , II, and III
• C) I only
• D) I and III only

---

Definitions:

Voluntary Muscles

Muscles that can be consciously controlled, such as those involved in moving arms or legs.

Autonomic

Pertaining to the autonomic nervous system, which controls involuntary bodily functions such as heart rate, digestion, and respiratory rate.

Sensory Neuron

A type of neuron that responds to inputs from the sensory organs (e.g., skin, eyes, ears) and transmits sensory information to the brain and spinal cord.

Motor Neuron

A type of neuron connected to muscles, capable of inducing muscle contraction upon activation.