Which of the following changes would most increase the resistance to blood flow in a blood vessel?

A. Decreasing the hematocrit from 50% to 40%
B. Doubling the length of the vessel
C. Halving the diameter of the vessel
D. Doubling the diameter of the vessel
E. Halving the length of the vessel


Answer: C

Anatomy & Physiology

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This figure shows the os coxa. Which of these statements about the figure is correct?

A. The figure shows a right bone, and number 1 indicates the anterior superior iliac spine. B. The figure shows a right bone, and number 3 indicates the greater sciatic notch. C. The figure shows a right bone, and number 8 indicates the ischial spine. D. The figure shows a left bone and number 7 indicates the obturator foramen. E. The figure shows a left bone, and number 6 indicates the ischial tuberosity.

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Which part of the renal tubular system reabsorbs or secretes the most substances?

A. Distal tubule B. Collecting duct C. Proximal tubule D. Descending loop

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The ________ is the inner lining of the uterus

A) perimetrium B) myometrium C) germinal epithelium D) uterine lumen E) endometrium

Anatomy & Physiology

The viscosity of blood is due more to the presence of ________ than to any other factor

A) erythrocytes B) fibrin C) nitrogenous wastes D) sodium E) albumin

Anatomy & Physiology