When an action potential begins and sodium channels open, why does sodium rush into the cell? (Check all that apply.)A) The inside of the cell is negatively charged.B) The inside of the cell is positively charged.C) Chloride ions are waiting to bind to the sodium inside the cell.D) The diffusion gradient drives sodium into the cell.E) Channels use energy to move ions across the membrane whenever they are open.
What will be an ideal response?
A, D
Biology & Microbiology
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Which of the following organisms is considered a primary consumer?
A. a cougar B. algae C. a grasshopper D. a toadstool E. a holly bush
Biology & Microbiology
Compare and contrast the advantages and disadvantages of gas exchange in terrestrial and aquatic environments. What will be an ideal response?
Biology & Microbiology
Which of the following statements is true of archegonia?
A) They are the sites where male gametes are produced. B) They may temporarily contain sporophyte embryos. C) They are the same as sporangia. D) They are the ancestral versions of animal gonads. E) They are asexual reproductive structures.
Biology & Microbiology
The removal and analysis of a piece of tissue that is suspected to be cancerous is called a(n) ________
Fill in the blank(s) with correct word
Biology & Microbiology