Substances that are recognized by the body as foreign and provoke an immune response are called
A) Antibodies
B) Antigens
C) Cytokines
D) White blood cells
Ans: A) Antibodies
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A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour. Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?
A. Water B. NH4+ C. NH3 D. CH3COO- E. Na+ Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about diffusion? What other information is related to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
All pinnipeds come ashore to: a. sleep and molt
b. birth and sleep. c. feed and mate. d. birth and molt.
The total cross-sectional area is greatest in which blood vessels?
A) venules B) arteries C) arterioles D) veins E) capillaries
The blood vessel that provides oxygen to the heart tissue is the
What will be an ideal response?