Multicelled, absorptive structures called __________ are on each fold of the small intestines. Fill in the blank(s) with the appropriate word(s)
villi
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Which tissue type allows the body to detect
and respond to internal and external changes?
a. nervous b. adipose c. epithelial d. connective e. skeletal muscle
The ______rate is the number of persons afflicted with a certain illness
Fill in the blank(s) with the appropriate word(s).
Which of the following is true concerning postnatal development?
a. Infancy is defined as the first two years of life after birth. b. Senescence results in increased hormone secretion. c. Postnatal development occurs before birth. d. In general, boys experience their pre-adolescent growth spurt later than girls. e. Early childhood is a time of rapid cell division in nerve cells.
What event most directly precedes the activity illustrated in Figure 40-5?
a. depolarization
b. an action potential
c. acetylcholine release from a motor neuron
d. release of calcium from the sarcoplasmic reticulum
e. release of ADP from the myosin head