Extrinsic control of arteriolar radius is
a. accomplished primarily by the sympathetic nervous system
b. important in the regulation of arterial blood pressure
c. sometimes overridden by local adjustments
d. all of the above
e. only a and b
D
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Using the mandible to close your mouth as you bite on food is an example of a ________ lever.
A. second-class B. third-class C. first-class
Answer the following statements true (T) or false (F)
1. Cells of the human body have a variety of shapes but they are all about the same size. 2. The dilute fluid that surrounds the outside of the cell is called cytoplasm. 3. Like chromosomes, ribosomes are made up mostly of nucleic acids. 4. The function of the endoplasmic reticulum depends on whether it is smooth or rough. 5. In passive transport, material will always move down a concentration or hydrostatic gradient.
The study of anatomical landmarks on the body surface is called ________
A) surface anatomy B) internal anatomy C) microanatomy D) None of the listed responses is correct.
The pharynx connects to the trachea via the ____
a. esophagus b. larynx c. bronchus d. glottis