The cause of skeletal muscle fatigue during extended submaximal exercise is primarily a(n)
A) depletion of K+ stores.
B) depletion of glycogen stores.
C) increased inorganic phosphate (Pi) concentration.
D) depletion of creatine stores.
B) depletion of glycogen stores.
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Answer the following statement(s) true (T) or false (F)
1. Binary fission in bacteria, where a single parent cell duplicates its genetic material and then splits into two daughter cells, is an example of sexual reproduction. 2. The X chromosomes from a female child are inherited from both the mother and father. 3. The sex of a zygote is determined by whether the egg is carrying an X or Y chromosome. 4. In the female fetus, the absence of testosterone results in the development of the external genitalia into clitoris, labia minora, and labia majora. 5. The uterus is a thick muscular chamber inferior to the urinary bladder. 6. The ovarian cycle typically lasts about 28 days, with day 1 considered to be the first day after ovulation.
The plateau portion of the O2-Hb curve
a. is in the blood- range that exists at pulmonary capillaries b. means that Hb becomes nearly saturated in the lungs unless pulmonary capillary falls below 60 mm Hg c. is in the blood- range that exists at the systemic capillaries d. is both a and b e. is both b and c
As an arterial pathway moves farther from the heart, the arteries
A. get larger. B. get smaller. C. show no change in their lumen size.
The brain and spinal cord are contained within the ________ body cavity
A) pelvic B) thoracic C) dorsal D) ventral