Conditions around metabolically active tissues do what to the oxyhemoglobin dissociation curve?
A) Shift it left B) Decrease the slope
C) Shift it right D) Increase the slope
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Question 2) A red blood cell is placed in a hypertonic solution. This means the concentration of solutes in the solution is ________ than the concentration of solutes in the intracellular fluid, and will cause the cell to ________.
A) lower; shrink
B) higher; swell
C) lower; swell
D) lower; burst
E) higher; shrink
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Question 3) Wolff's law of bone explains the effect of ________.
A) mechanical stress on bone remodeling
B) sex on bone widening
C) age on bone thickening
D) different diets on bone elongation
E) temperature on bone growth
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Question 4) To stimulate muscle contraction, acetylcholine is released from the ________ into the synaptic cleft.
A) synaptic vesicles
B) sarcolemma
C) terminal cisterna
D) junctional folds
E) sarcoplasmic reticulum
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Question 5) Where does the highest rate of tissue protein turnover occur?
A) The gastric mucosa
B) The intestinal mucosa
C) The pancreatic islets
D) The splenic sinusoids
E) The hepatic sinusoids
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Question 6) Endurance athletes commonly have a resting heart rate as low as 40 bpm, and a stroke volume as low as 50 mL/beat.
Indicate whether the statement is true or false
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Question 7) The autonomic nervous system carries out many somatic reflexes that are crucial to homeostasis.
Indicate whether the statement is true or false
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Question 8) Metabolically active tissues have which of the following sets of conditions that shift the oxyhemoglobin dissociation curve to the right?
A) PO2, PCO2, temperature, BPG B) PO2, PCO2, temperature, BPG
C) PO2, PCO2, temperature, BPG D) PO2, PCO2, temperature, BPG
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Question 9) The sodium-potassium (Na+-K+) pump transports both sodium and potassium ________ their concentration gradients in a process called ________.
A) down; countertransport
B) up; active transport
C) up; cotransport
D) down; active transport
E) up; facilitated transport
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Question 10) The ________ completely encloses the embryo and provides it with a stable environment.
A) chorionic villus
B) amnion
C) yolk sac
D) allantois
E) chorion
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