A motor unit consists of one muscle cell and all the motor neurons that stimulate that muscle cell.
a. true
b. false
Answer: b. false
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Imagine you conduct a parabiosis experiment with two strains of mice, one of which lacks a functional leptin gene (ob strain) while the other lacks a functional receptor for this hormone (db strain). Which of the following outcomes would you observe?
A. no weight change in the ob mouse B. no weight change in the db mouse C. increased body weight in the ob mouse D. decreased body weight in the ob mouse E. decreased body weight in the db mouse
Phosphorus is required for building all of the
following EXCEPT a. amino acids. b. phospholipids c. nucleic acids d. ATP. e. DNA.
Describe what would happen if all of your skeletal muscles contracted at the same time
What will be an ideal response?
Which phylum is strictly marine with no freshwater
or terrestrial forms? a. Echinodermata b. Platyhelminthes c. Cnidaria d. Mollusca e. Annelida