Cardiac muscle fibers need outside nervous stimulation in order to contract.
Answer the following statement true (T) or false (F)
False
Cardiac muscle fibers do not need outside nervous stimulation to contract; skeletal muscle does.
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The ____________________ is a modified sympathetic ganglion that does not give rise to postganglionic fibers but instead secretes hormones similar or identical to sympathetic postganglionic neurotransmitters into the blood
Fill in the blank(s) with correct word
A motor unit contains
A. multiple motor neurons and one muscle fiber. B. one motor neuron and multiple muscle fibers. C. one motor neuron and one muscle fiber. D. multiple motor neurons and multiple muscle fibers.
How do epithelial tissues obtain needed nutrients?
A) Blood vessels travel through all the layers of the epithelium to provide nutrients. B) Blood vessels travel through the basal layer of the epithelium to provide nutrients. C) Blood vessels travel through underlying tissues to provide nutrients. D) Epithelial tissue stores nutrients so it has a constant supply. E) Epithelial tissue does not nutrients because it is not living tissue.
A small sac of gland cells arranged around a space into which they secrete their product is called a(n) __________.
A. areolus B. acinus C. ductus D. lobule E. varix