Imagine a genetic mutation that resulted in a malfunctioning inactivation gate in a voltage-gated sodium channel. The defective gate wouldn't always open and close when it should. What functional problems would this cause for the neurons?
What will be an ideal response?
Neurons' axons would not fire action potentials appropriately. Sometimes, when the gate is improperly closed, they would not fire when they should (despite a strong stimulus). Other times, when the gate remained inappropriately open, the axon would lack a refractory period--it might fire bursts of impulses when only one is called for, and it might propagate impulses backward and forward.
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A body builder stirred wheat germ and pineapple bits into her yogurt. She pointed out to her colleague that her recipe was a double shot of an essential trace element. Which element was she referring to?
A) Iron B) Zinc C) Copper D) Manganese
Glucocorticoids are hormones produced and secreted by the __________.
a. cortex of the adrenal glands b. somatosensory cortex of the cerebrum c. cortex of the cerebral hemisphere d. medulla of the adrenal glands
Gap junctions
What will be an ideal response?
Antibody-mediated immunity is also known as
A. humoral immunity. B. hormonal immunity. C. neural-mediated immunity. D. cell-mediated immunity.