What transport process can create a concentration gradient for sodium across the plasma membrane?
a. osmosis
b. phagocytosis
c. facilitated diffusion
d. active transport
e. passive diffusion
Ans: d. active transport
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The ________ valve prevents backward flow into the left atrium
A) semicaval B) semilunar C) bicuspid D) tricuspid E) pulmonic
Tough, flexible fibers that resist stretching and are abundant in tendons and bones are __________ fibers.
Fill in the blank(s) with the appropriate word(s).
Which of the following types of neurons is exclusively found in the cerebellum?
a) bipolar neuron b) multipolar neuron c) Purkinje cells d) unipolar neuron e) pyramidal cells
Steroid hormones generally bind with receptors inside target cells and control the rate of formation of mRNAs that lead to the synthesis of proteins.
Answer the following statement true (T) or false (F)