Closure of the Na+ channel inactivation gate is responsible for the ______ refractory period.

Fill in the blank(s) with the appropriate word(s).


Answer: absolute

Biology & Microbiology

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Which of the following is true about attenuated vaccines?

a. They run a high risk of causing a full-blown case of the disease. b. One vaccine can prevent a multitude of infectious diseases. c. They lead to better and longer-lasting immunity. d. They lead to less-effective and shorter immunity.

Biology & Microbiology

Based on Figure 42-1, the __________ is much more developed in amphibians than in reptiles


a. cerebellum
b. cerebrum
c. optic lobe
d. olfactory tract
e. corpus striatum

Biology & Microbiology

___ are a type of internal signal molecule used in controlling the cell cycle.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Integral proteins with carbohydrates (sugars) attached that stick out on the exterior surface of cello membranes help recognize "self" and are called ______________.

a) amino acids b) lipoproteins c) glycoproteins d) monosccharides

Biology & Microbiology