Action potentials are conducted more rapidly
A) in small-diameter axons than in large-diameter axons.
B) in unmyelinated axons than in myelinated axons.
C) along axons that have nodes of Ranvier.
D) all of the above.
Answer: C) along axons that have nodes of Ranvier.
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Oxygen consumption increases with exercise due to the fact that the contracting muscles are doing work and require ATP to produce the contractions.
A) How does the body meet the increased demand for oxygen? B) Calculate the oxygen consumption of a runner using the following information: Heart Rate: 130 bpm; Stroke Volume: 270 mL/beat; Arterial oxygen content: 250 mL O2/L blood, and Venous oxygen content: 100 O2/L blood.
____________________ helps in the process of blood coagulation.?
Fill in the blank(s) with correct word
When shear stress increases, endothelial cells release nitric oxide, which diffuses to the underlying smooth muscle and promotes vasodilation
a. True b. False Indicate whether the statement is true or false
Which of the following is not a function of lymph nodes?
A) act as lymph filters and activate the immune system B) produce lymphoid cells and granular WBCs C) produce lymph fluid and cerebro-spinal fluid D) serve as antigen surveillance areas