During a run, your gastrocnemius (calf) muscle has a temperature of 38.5° C, while your biceps brachii (upper arm) muscle has a temperature of 37.5° C. Which of the following is TRUE of the red blood cells as they pass by these muscles?
A. The hemoglobin molecules will have the same affinity for oxygen at both locations.
B. The hemoglobin molecules may denature as they pass by the gastrocnemius.
C. The hemoglobin molecules will have a higher affinity for oxygen as they pass by the gastrocnemius compared to the biceps brachii.
D. The hemoglobin molecules will have a higher affinity for oxygen as they pass by the biceps brachii compared to the gastrocnemius.
Answer: D
You might also like to view...
What is true about spermatogenesis?
A) The process is similar to oogenesis. B) Spermatogenesis occurs in one short process. C) Primary spermatocytes undergo meiosis to form gametes. D) Spermatogonia undergo mitosis to form spermatocytes.
The levator ________ is the muscle that opens the eye and raises the upper lid.
Fill in the blank(s) with the appropriate word(s).
In a negative feedback mechanism, the response of the effector
A. reverses the original stimulus. B. is usually damaging to the body. C. creates a cycle that leads away from homeostasis. D. has no effect on the original stimulus. E. enhances the original stimulus.
The filamentous protein network that serves as the attachment site for actin myofilaments is called the _____.
a. myosin myofilament b. actin myofilament c. sarcomere d. Z disk e. cross-bridge