A neuron's repetitive firing rate is limited by an absolute refractory period, during which a new action potential cannot be generated. Which event is chiefly responsible for this limit?

What is a particle with two or more atoms joined together

Describe the role of a producer in a food chain.

Which of the following statements is true of hyponatremia? a. It is a condition characterized by low blood potassium concentration. b. It occurs as a result of zinc deficiency and often leads to serious heart problems. c.

Which medical condition is he likely to suffer from if he continues drinking? A B. lack of muscle coordination fatty liver c. unconsciousness OD. stupor E nausea

The heavier elements on the Earth (those with atomic numbers greater than 5) Choose one: A. were formed immediately after the Big Bang. B. were in existence at the moment of the Big Bang. C.

Define of following terms: Autotroph, Heterotrophs

When stopped at railroad crossing with multiple tracks cross?

What similarity do animals and plants share?

What is the function of the diaphragm I'm the human body

What is one of the purposes of inflammation? encourages infection concentrates toxins prepares an injured area for healing inhibits adaptive immune responses?