Which of the following substances is most likely to passively diffuse across the plasma membrane by dissolving in the membrane?
a. a cation
b. an anion
c. a nonpolar or nonionized molecule
d. a polar molecule
e. a molecule less than 0.8 nm in diameter
C
Anatomy & Physiology
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The process by which the three primary germ layers are formed during the third week of development is known as __________
Fill in the blank with correct word.
Anatomy & Physiology
Which of the following would lead to increased erythropoiesis?
A. Increased blood pressure B. Increased CO2 levels C. Increased blood pH D. Increased erythropoietin levels E. Increased environmental O2 levels
Anatomy & Physiology
Which type of membrane does not open to the exterior, does not contain glands, but does secrete fluid?
A. Synovial B. Cutaneous C. Gobletal D. Mucous E. Serous
Anatomy & Physiology
The posterior aspect of the body has ________ enclosed cavities.
A. 5 B. 4 C. 2 D. 1 E. 3
Anatomy & Physiology