List the 3 major groups of baleen whales and give their major features
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The three major groups of baleen whales are the right whales, rorquals, and the gray whales. Right whales are characterized by having no dorsal fins and no pleats or grooves on their lower jaw. Rorquals have dorsal fins and grooves on their lower jaw that aid in the expansion of the mouth for feeding purposes. Gray whales lack grooves and a distinct dorsal fin but have a dorsal bump toward the rear third of the body.
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Marathon runners are encouraged to stop at water stations along the course to stay hydrated. However, occasionally a runner drinks too much water and suffers from hyponatremia, or "water intoxication". While water itself is not toxic, drinking too much can upset ion balance in the extracellular space. Based on what you know about ions and nerve signaling, the levels of which important ion are most likely to be disrupted in hyponatremia?
The word hyponatremia derives from the words hypo ("under" or "less") and natrium ("sodium"). The word natrium is the basis for the abbreviation Na for sodium. Hyponatremia is a rare condition, but has become of more concern with the rise in amateur runners participating in marathons. Since they run slower, they spend longer on the course and have more opportunity to drink water and sweat out additional sodium. A. hydrogen B. potassium C. calcium D. sodium E. oxygen Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about components of the nervous system? What other information is related to the question? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During cellular respiration, electrons move through a series of electron acceptor molecules. Which of the following is a TRUE statement about this process?
A) The electrons gain energy as they move from one electron acceptor to another. B) Oxygen is eventually reduced by the electrons to form water. C) The electrons release large amounts of energy each time they are transferred from one electron acceptor to another. D) Glucose is eventually reduced by the electrons to form water.
Nutrient absorption is mediated by the
A. peptidoglycan layer. B. nuclear membrane. C. cell wall. D. cell membrane. E. proteins in the periplasmic space.
These skin cells fight infections: ________
A) fibroblasts B) macrophages C) melanocytes D) neuroglia