What odorless, colorless gas binds preferentially with the same binding site on hemoglobin as oxygen?
A) hydrogen sulfide
B) carbon monoxide
C) nitrous oxide
D) methane
B
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Identify three ways the small intestine is modified to increase the surface area for digestion and absorption.
What will be an ideal response?
Damage to a joint cartilage is affecting which type of tissue?
A) fluid connective B) dense connective C) supporting connective D) loose connective E) adipose
All of the following are true of the allantois except
A) it derives partly from endoderm. B) it projects into the umbilical stalk. C) it derives partly from mesoderm. D) part will develop as the urinary bladder. E) it acts as the fetal bone marrow.
The thermoneutral zone is defined as
A. the environmental temperature range over which the changes in skin blood flow alone can regulate body temperature. B. the region of the body halfway between the high-temperature core and the low-temperature skin. C. the core body temperature at which no energy is expended to maintain homeostasis. D. the region in the central core of the body where temperature never changes. E. the environmental temperature range in which shivering, changes in blood flow, and changes in thyroid hormone concentrations can maintain homeostasis of the body's core temperature.