Compare the efficiency of mammalian lungs versus fish gills
What will be an ideal response?
ANSWER: Fish gills are 80% to 90% efficient. This is due to countercurrent exchange. Mammalian
lungs are only about 25% efficient. However, the oxygen content in water is low compared
to air.
You might also like to view...
Each of the following are steps in the receptor kinase signaling pathway EXCEPT ____
a. a signal molecule binds to a membrane receptor protein b. protein kinase is activated c. GTP donates a phosphate group to an inactive protein kinase d. a specific protein is activated via phosphorylation e. a cellular response is initiated
A woman was told by her doctor that while she is pregnant, she might want to let someone else care for her cats so she would not contract toxoplasmosis. What is the mechanism of transmission of toxoplasmosis?
A. infection from mice the cat may bring into the house B. exposure to infected cat feces C. infection from saliva D. scratches from infected claws E. flea bites transmit the organism
A 30-year-old woman who is not pregnant presents with a foul-smelling, greenish vaginal discharge, indicating some form of vaginitis. A smear is taken, and routine tests performed. A motile, unicellular eukaryote with multiple flagella and an undulating
membrane is observed in the microscope. What treatment is recommended? A) topical antifungal cream B) clindamycin C) combination therapy of ceftriaxone and azithromycin D) doxycycline E) single dose of metronidazole
When you hit your "funny bone," what are you hitting?
A. acromion process B. head of ulna C. deltoid tuberosity D. glenoid cavity E. olecranon process