Which molecules form the basis for the lipid bilayer structure of the plasma membrane?
A. Cholesterol
B. Glycolipids
C. Transmembrane proteins
D. Phospholipids
E. Glycoproteins
D. Phospholipids
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The aging process causes all of the following effects on the integumentary system EXCEPT ________.
A. increased skin elasticity B. increased skin delicacy C. increased likelihood of multiple skin lesions D. increased likelihood of skin cancer
The release of neurotransmitter from a neuron is an example of
A. endocytosis and is a form of passive transport. B. receptor-mediated endocytosis and it requires expenditure of ATP. C. exocytosis and is a form of passive transport. D. exocytosis and it requires expenditure of ATP. E. pinocytosis and it is a form of primary active transport.
Which of the following statements is correct regarding RNA?
A) Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis. B) If the base sequence of DNA is ATTGCA, the messenger RNA template will be UCCAGU. C) There is exactly one specific type of mRNA for each amino acid. D) rRNA is always attached to the rough ER.
What is a normal heart rate for healthy adults at rest, and what neural inputs contribute to the achievement of that range? How is heart rate affected when all nervous system input to the heart is blocked, and why is this effect seen?
What will be an ideal response?