Select the correct statement about oxygen transport in blood:
A) During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2.
B) During conditions of acidosis, hemoglobin is able to carry oxygen more efficiently.
C) Increased BPG levels in the red blood cells enhance oxygen-carrying capacity.
D) A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
D) A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
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What type of acid-base imbalance is present when a patient has a blood pH of 7.50?
a. Acidosis b. Alkalosis c. Carbonation d. No imbalance present
What is one difference between visceral reflexes and somatic reflexes?
A. Visceral reflexes do not require interneurons in the CNS, whereas most somatic reflexes do. B. Visceral reflexes do not require afferent neurons, whereas somatic reflexes do. C. Visceral reflexes are unconscious while somatic reflexes are conscious. D. Visceral reflexes are stereotyped whereas somatic reflexes are unpredictable. E. Visceral reflexes involve somewhat slower responses than somatic reflexes.
Skin wrinkle and sagging is caused by
A) UV radiation. B) hormonal changes. C) aging. D) all of the choices. E) none of the choices.
Arteriole blood pressure increases in response to all but which of the following?
A) increasing stroke volume B) increasing heart rate C) rising blood volume D) falling blood volume E) all of these