What is the function of the foramen ovale during fetal life?
a) Allowing blood to flow directly from the right atrium into the left atrium.
b) Allowing blood to flow directly from the right ventricle into the left ventricle.
c) Serves as a valve in the vena cava to regulate venous blood flow.
d) Prevents back flow of blood from aorta into the left ventricle.
e) Prevents back flow of blood from pulmonary trunk into the right ventricle.
a
You might also like to view...
Interferon, natural killer cells, and cytotoxic T cells all exert antiviral and anticancer effects
Indicate whether the statement is true or false
Contraction of the cremaster and dartos muscles
A. causes the epididymis to shrink. B. increases during exercise. C. pull the testes closer to the body. D. is responsible for ejaculation. E. causes the penis to become erect.
Tina falls while climbing a tree and lands on her back. Her frightened parents take her to the emergency room, where she is examined. Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex). These results suggest that
A) Tina has injured one of her descending nerve tracts. B) Tina has injured one of her ascending nerve tracts. C) Tina has a spinal injury in the lumbar region. D) Tina has a spinal injury in the cervical region. E) Tina suffered no damage to her spinal cord.
The reaction time for endocrine effects is generally measured in milliseconds.
Answer the following statement true (T) or false (F)