How do autocrine signals work?
What will be an ideal response?
Ans: The cell releases chemicals that effect the cell that produced them, e.g. a tumor cell making its own cell division signals
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Membrane potential is determined by:
A. the number and types of proteins present in the plasma membrane of a cell. B. the difference in concentration of ions and charged molecules across the plasma membrane of a cell. C. the number and type of phospholipids present in a membrane. D. the concentration of cholesterol in a membrane.
Continuous phenotypic variations can be explained by Mendelian inheritance
a. True b. False Indicate whether the statement is true or false
Which of the following statements is false?
a. Synapses are direct contacts between neurons. b. Both sensory and motor neurons use action potentials to transmit information. c. The hypothalamus acts as an endocrine gland. d. Sensory neurons carry impulses toward the central nervous system. e. Motor neurons carry impulses away from the central nervous system.
Which extra-embryonic membrane gives rise to blood vessels in the umbilical cord?