Which of the following changes does not occur at birth when an infant takes his or her first breaths?
A) Blood flow to the lungs decreases.
B) The resistance in the pulmonary arteries decreases.
C) Changes in blood flow cause the foramen ovale to close.
D) Air enters the alveoli.
E) Gas diffuses across the alveolar-capillary membrane.
A
You might also like to view...
Of the total inorganic components in bone, calcium accounts for what percent?
A) 17% B) 9.7% C) 39% D) 72% E) 0.72%
What are lymphatic nodules?
A. Small lymph nodes B. Bulges in lymphatic vessels C. Lymphatic follicles D. Lymphatic tissue found only in the appendix and tonsils E. A collection of B lymphocytes
Compounds classified as ________ alter synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or removal of neurotransmitter.
A. neurohormones B. neuromodulators C. excitatory neurotransmitters D. inhibitory neurotransmitters
Jan has a history of miscarriage in the first trimester. Her physician thinks that her problem might be hormonal. What hormones could be implicated in failing to maintain the pregnancy during the first trimester and why?