During ventricular contraction
A. only the AV valves open.
B. only the AV valves close.
C. only the semilunar valves close.
D. the semilunar valves close and the AV valves open.
E. the semilunar valves open and the AV valves close.
E
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Responds to environmental changes by transmitting electrical impulses.
A) Skeletal B) Nervous C) Integumentary D) Muscular
The major categories of hormones are
amino acid derivatives, peptide hormones, and lipid derivatives enzymes, prosthetic groups, and antioxidants growth factors, endorphins, and glycoproteins paracrine factors, proteins, lipids all of the above are correct
Correctly match the term and definition: The protein component of the plasma membrane that is firmly inserted into the lipid bilayer.
A)Phospholipid B)Glycolipid C)Integral protein D)Peripheral protein E)Cholesterol
Hexagonal lobules are characteristic of this organ
A) pancreas B) liver C) gallbladder D) salivary gland