A needle pierces through the epidermal layers of the forearm in which of the following order?
A) basale, spinosum, granulosum, corneum
B) basale, spinosum, granulosum, lucidum, corneum
C) granulosum, basale, spinosum, corneum
D) corneum, granulosum, spinosum, basale
Ans: D) corneum, granulosum, spinosum, basale
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Use the following figure and information to answer the question(s) below
Fishes that have swim bladders can regulate their density and, thus, their buoyancy. There are two types of swim bladder: physostomous and physoclistous. The ancestral version is the physostomous version, in which the swim bladder is connected to the esophagus via a short tube (see the figure above). The fish fills this version by swimming to the surface, taking gulps of air, and directing them into the swim bladder. Air is removed from this version by "belching." The physoclistous version is more derived, and has lost its connection to the esophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swim bladder. When a shark stops swimming, it _____. 1. sinks 2. quickly dies 3. oxygenates its blood less effectively A) 1 only B) 2 only C) 3 only D) 1 and 3 E) 1, 2, and 3
Which of the following plant organelle is a colorless plastid that stores starch in roots?
A. thyloplasts B. chloroplasts C. chromoplasts D. amyloplasts E. both chloroplasts and chromoplasts
In the single circulation of a fish, _______ and _________ are present.
A. one atrium, one ventricle B. two atria, one ventricle C. two atria, two ventricles D. one atrium, two ventricles E. no atrium, one ventricle
In the process of agglutination, IgD antibodies
A) bind to antigens on two different cells. B) activate the complement system. C) stimulate the release of histamine from mast cells. D) remove the antigen from the pathogen. E) block access to the antigenic site.