What is a nephron?
a) a structure that collects urine
b) a glomerulus and its capsule
c) a capillary bed within the medulla
d) a functional unit of the kidney
d) a functional unit of the kidney
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A neuron is exposed to a drug that completely blocks voltage-gated potassium channels, but has no effect on non-gated channels or the sodium-potassium pump. Which of the following describes the effect on action potential generation?
A. Resting potential would not be maintained, as potassium could not leak out of the neuron. B. Repolarization will never occur after threshold is crossed and sodium will continue to flow into the neuron. C. Repolarization will still occur, but at an inefficiently slow rate. D. Threshold will never be crossed, and therefore an action potential will never be generated.
Which type of muscle fiber predominates in the leg muscles of endurance athletes, such as long-distance runners?
A) fast fibers B) slow fibers C) intermediate fibers
During amphimixis,
A) sperm become capacitated. B) the zygote is formed with 46 chromosomes. C) the male and female pronuclei fuse. D) meiosis occurs. E) gametes are formed.
Visceroreceptors are receptors associated with joints, tendons, and other connective tissue
Indicate whether the statement is true or false.