Which likely would not occur if blood pressure decreased? a. Increased cardiac output to counteract the pressure change. b.  Increased firing of the aortic arch sensory receptors. c. Increased sympathetic activity to counteract the pressure change. d. Decreased frequency of action potentials to cardiovascular center.

Which is false regarding the sympathetic nervous system?    a. It increases the slope of the pacemaker potential so that threshold is reached more rapidly.    b. It increases the contractile ability of the heart.    c. It increases the transmission of impulses to the ventricle.    d. It exerts negative chronotropic effects on the heart.    e. It is dominant during exercise.

The presence of _______ in the blood is responsible for generating the plasma-colloid osmotic pressure.

The simplest mechanism by which ATP is produced to replenish its supply when it decreases is by:   a. Oxidative phosphorylation   b. Transfer of a phosphate from creatine phosphate to ADP.   c. Glycolysis   d. Degradation of myoglobin   e. None of those mentioned is correct.

To what is the light blue arrow I created on the figure pointed to.  The tip of the pointer is in the yellow structure to be identified.  Be very specific.  Put answer in space provided.  

Action potentials from the SA Node spread to other regions of the atria via the ________ pathway.

The Frank-Starling Law of the Heart is characterized by all of the following except:   a. A failing heart shifts the curve to the right.   b. Increased end-diastolic volume causes increased stretch of the ventricular myocardium.   c. The resting length of the myocardium is less than the optimal length.   d. In a human heart there is no descending portion of the length-tension curve.   e. It represents an extrinsic mechanism for regulating stroke volume.

Which is true regarding the transport of fluid and solutes through capillaries?    a. Colloid osmotic pressure is greater at the arteriolar end of the capillary.     b. Capillary pressure is greater at the venular end of the capillary.     c. Approximately 85% of the fluid filtered from the capillary initially is returned directly to the capillary.     d. Plasma proteins within the capillary favor the movement of fluid out of the capillaries.     e. None of those mentioned is true.

Tetanus can occur in muscle(s), but does not occur in muscle(s).

On an EKG record, what is the main difference between an interval and a segment?  Explain briefly.