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348 Exam #1 Questions With Correct Detailed Answers.
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348 Exam #1 Questions With Correct Detailed Answers.
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348 Exam #1 Questions With CorrectDetailed Answers.
Marathon runners primarily rely on anaerobic pathways for the needed energy.
A. True B. False - ANSWER- False
Overall efficiency of aerobic respiration is 34%.
A. True B. False - ANSWER- True
During a single krebs cycle, ____ molecule(s) of NADH and ___
molecule(s) of FADH are produced.
A. 2.5, 1.5
B. 1.5, 2.5
C.3,1
D.1,3 - ANSWER- C. 3,1
When oxygen is sufficient, NADH produced in glycolysis is converted back to NAD+ by
__________.
A. converting pyruvic acid to lactic acid
B. "shuttling" H into the mitochondria - ANSWER- B. "shuttling" H into the mitochondria
Breakdown of ATP is an exergonic reaction.
A. True B. False - ANSWER- True
Enzymes are catalysts that increase the rate of reactions by ______ the energy of
activation
A. lowering B. increasing - ANSWER- A. lowering
Muscular contractions that occur during normal body movements are tetanic
contractions.
A. True B. False - ANSWER- True
________ skeletal muscle fibers have the lowest ATPase activity.
A.Type IIx
B.Type I
C.Type IIa
D.Type IIb - ANSWER- B. Type 1
Sarcolemma is the _________ of a skeletal muscle fiber
.A. cytoplasm
B. cell membrane
C. nucleus - ANSWER- B. cell membrane
, Which list is in correct order?
A.
Wholemuscle
Fascicles
Musclefibers
Myofibrils
Sarcomeres
Actin&myosin proteins
B.
Wholemuscle
Fascicles
Myofibrils
Musclefibers
Sarcomeres
Actin&myosin proteins - ANSWER- A.
Which list on the next slide has the structure of skeletal muscles in the correct order
from largest to smallest structures? - ANSWER- Sarcolemma, Myofibril, Sarcomere,
Myofilament
Not all neurotransmitters are excitatory.
A. True B. False - ANSWER- True
At rest, a neuron is polarized because the inside of a neuron is ______ charged relative
to the outside.
A. negatively B. positively - ANSWER- negatively
Quizzes can be made up as long as they are excused ones.
A. True B. False - ANSWER- False
The term homeostasis is defined as ____.
A. a change within the internal environment
B. the maintenance of a constant internal environment
C. a low metabolic rate - ANSWER- B. the maintenance of a constant internal
environment
homeostasis - ANSWER- normal resting conditions= relatively constant and "normal"
internal environment
steady state - ANSWER- physiological variable is unchanging, but not necessarily
"normal"; balance between demands placed on body and the body's response to those
demands. Ex: body temp, arterial blood pressure
Body temperature reaches a _______ when at a steady state - ANSWER- plateau
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