The innermost layer of the heart is called the:
a. epicardium
b. endocardium
c. visceral pericardium
d. both A and C above
b. endocardium
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Match the chemical signal with the appropriate description.A. Chemicals produced by neurons that function as hormonesB. Chemicals that act locally on nearby cellsC. Chemical secreted by presynaptic terminalD. Influences same cell type from which it is secretedE. Chemical secreted into blood by specialized cells; travels some distance to target tissuesNeurotransmitter
Fill in the blank(s) with the appropriate word(s).
A telomere is a type of hormone that controls the cell cycle.
Answer the following statement true (T) or false (F)
This figure shows a posterior view of the organs of the female reproductive system. What structures does number 6 indicate?
A. Mesosalpinx B. Fimbriae C. Ovarian tubules D. Cilia E. Mesovaria
About two-thirds of the body's fluid is within cells and is termed ________ fluid
A) intracellular B) intercellular C) extracellular D) interstitial E) vital