(LO 1.13) The [carbon dioxide] is _______ in the lumen of the alveoli than in the capillaries, and the [oxygen] is _______ in the lumen of the alveoli than in the capillaries.
a. higher, higher b. the same, the same c. lower, higher d. higher, lower e. lower, lower c.
(LO 1.15) Where are the hydr...
BIO 1050 Exams 1-3 Practice Questions
and Answers
(LO 1.13) The [carbon dioxide] is _______ in the lumen of the alveoli than in the
capillaries, and the [oxygen] is _______ in the lumen of the alveoli than in the
capillaries.
a. higher, higher
b. the same, the same
c. lower, higher
d. higher, lower
e. lower, lower ✅c.
(LO 1.15) Where are the hydrophilic heads of the phospholipids of a cellular
membrane?
a. touching the hydrophobic regions of proteins and phospholipids
b. touching water and hydrophilic regions of proteins
c. touching each other while the hydrophobic tails touch the cytosol and watery fluid
outside the cells
d. touching the hydrophobic regions of phospholipids
e. touching the hydrophobic regions of proteins ✅b.
(LO 1.13) Compared to blood in the left heart, the blood in the right heart would have
a. the same [oxygen] and [carbon dioxide].
b. higher [oxygen] and lower [carbon dioxide].
c. lower [oxygen] and higher [carbon dioxide].
d. lower [oxygen] and [carbon dioxide].
e. higher [oxygen] and carbon dioxide]. ✅c.
(LO 1.5 and 1.17) The graph on the back of the cover page best represents
a. a reaction catalyzed by an enzyme.
b. a reaction that is not catalyzed by an enzyme.
c. cellular respiration.
,d. a reaction that releases energy.
e. an endergonic reaction. ✅e.
(LO 1.21) The Calvin cycle of photosynthesis can also be called the carbon fixation
reactions. Not in the light reactions, but in the Calvin cycle of photosynthesis
a. carbon dioxide is converted into organic molecules, like glucose.
b. water and oxygen are combined to make glucose and carbon dioxide.
c. light energy is used to make ATP and NADPH.
d. glucose is broken down into carbon dioxide and oxygen. ✅a.
(LO 1.11) A muscle contracts because
a. the ends of the muscle cell push on the bone though the tendons.
b. the bones of the skeleton push the ends of the muscle together.
c. hormones signal the muscle fibers to shorten.
d. the filaments of the cytoskeleton slide past each other using the energy of ATP. ✅d.
(LO 1.6) There is a hormone called calcitonin. Calcitonin reduces blood calcium
concentrations. Blood calcium concentration is maintained under homeostatic control.
When would you expect the endocrine system to release calcitonin?
a. when the blood calcium concentration is in homeostasis
b. when the blood calcium concentration is below the homeostatic range, but increasing
c. when the blood calcium concentration is above the homeostatic range
d. when the blood calcium concentration is very far below the homeostatic range and
still decreasing ✅c.
(LO 1.13) In the fed state, what moves out of the capillaries in the small intestines?
a. carbon dioxide
b. glucose and oxygen
c. carbon dioxide and oxygen
d. oxygen
e. carbon dioxide and glucose ✅d.
, (LO 1.8) Which three organ systems are most involved in increasing the concentration
of oxygen in a muscle when you start to exercise?
a. nervous, endocrine, and digestive
b. endocrine, musculoskeletal, and pulmonary
c. musculoskeletal, pulmonary, and digestive
d. cardiovascular, pulmonary and nervous
e. digestive, endocrine, and cardiovascular ✅d.
(LO 1.13) Of the following, where would the oxygen concentration be the lowest?
a. in the veins of the muscle
b. in the artery of the muscle
c. in the veins leaving a lungs
d. in the left heart ✅a.
(LO 1.2) In type 2 diabetes
a. the body stops making glucose channels.
b. the [glucose] in the blood is dangerously low.
c. the endocrine system stops making all hormones.
d. the body does not respond to insulin as well as normal.
e. the pancreas stops making insulin. ✅d.
(LO 1.17) Which of the following is most likely to be endergonic?
a. converting glucose and oxygen to carbon dioxide and water
b. converting ATP to ADP and Pi
c. a reaction being catalyzed by an enzyme
d. making a bond between to carbon atoms
e. a reaction with more energy in the reactants than in the products ✅d.
(LO 1.15) Which of the following is NOT a type of membrane protein?
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