In terms of blood flow, why is it important that atrial diastole occurs just as ventricular systole begins?

A. Blood is continually propelled in a forward motion down its pressure gradient.
B. The atria need that time to prepare for the next contraction.
C. Ventricular systole pulls the remaining 20% of blood volume from the atria.
D. Blood would flow too fast otherwise.


Answer: A. Blood is continually propelled in a forward motion down its pressure gradient.

Anatomy & Physiology

You might also like to view...

The sternal angle can be used as an anatomical landmark to identify the position of the

A.  apex of the heart. B.  jugular vein. C.  second rib. D.  trachea. E.  hyoid bone.

Anatomy & Physiology

A focus of research is the effect of chemical pollutants, called estrogen mimics, on reproductive development. What condition has increased in recent years that may be due to an environmental factor such as estrogen mimics?

A. Prostate cancer B. Syphilis C. AIDS D. Hypospadias E. Male climacteric

Anatomy & Physiology

When a nonpolar molecule is placed in water, it will

A. neither dissolve nor carry electrical current.? B. dissolve and carry electrical current.? C. dissociate and carry electrical current.? D. carry electrical current but not dissolve or dissociate.

Anatomy & Physiology

There is an obligatory increase in metabolic rate resulting from food intake

Indicate whether the statement is true or false

Anatomy & Physiology