Answer the following statements true (T) or false (F)
1. A precapillary sphincter is a cuff of smooth muscle that regulates the flow of blood into the capillaries.
2. The carotid sinus reflex protects the blood supply to the brain, whereas the aortic reflex is more concerned with maintaining adequate blood pressure in the systemic circuit as a whole.
3. Vasodilation is a widening of the lumen due to smooth muscle contraction.
4. The pulmonary circulation does not directly serve the metabolic needs of body tissues.
5. The most common form of shock is hypovolemic shock.
1. TRUE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
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The hormone oxytocin aids the birth process by stimulating
A) an increase in estrogen secretion. B) an increase in progesterone secretion. C) fetal muscular movements. D) uterine wall contractions.
When blood plasma filters out of capillaries to become interstitial fluid, most of the ________ are left behind in the capillaries.
A. lipids B. nutrients C. oxygen molecules D. plasma proteins E. carbohydrates
What is a dipole?
A) a polar molecule B) an organic molecule C) a type of reaction D) a type of bond
The primary motor cortex is part of the
A. parietal lobe. B. insula. C. temporal lobe. D. occipital lobe. E. frontal lobe.