PNB 2250 Exam 3 Questions and Answers – Updated 2024
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Course
PNB 2250
Institution
PNB 2250
PNB 2250 Exam 3 Questions and Answers
– Updated 2024
Of the following, which is NOT a strategy by which endotherms generate internal heat: - Ans:-
Panting
The minimal metabolic activity required to maintain bodily functions in a mammal is known as the -
Ans:-basal metabolic rate.
Which of t...
Respiratory Quotient is ____________ . - Ans:✔✔-Ratio of CO2 produced / Oxygen consumed
Non-shivering thermogenesis, a strategy used by many small mammals involves: - Ans:✔✔-Oxidizing BAT
to produce heat
Temporal heterotherms such as the ____________ regulate heat by ____________ . - Ans:✔✔-
Hummingbird; going into daily torpor to reduce energy demands
The direct transfer of energy from objects of differing temperature that are in contact with each other is
_______________ . - Ans:✔✔-conduction
The swordfish's heater organ involves all of the following EXCEPT ___________ . - Ans:✔✔-Oxidation of
brown adipose tissue
The principal role of calcium in skeletal muscle contraction is to - Ans:✔✔-bind troponin, which in turn
permits tropomyosin to uncover the cross-bridge binding site on the thin filament.
A vertebrate motor unit is - Ans:✔✔-a motor neuron and the muscle fibers it innervates
When a skeletal muscle contracts, ___________ - Ans:✔✔-Actin filaments slide inward along myosin
filaments, making the I band more narrow
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