[問題] 普生問題

[a84539568 (Toro)]

(1) Which of the following is (are) characteristic of a simple nervous system?

    A) a nerve net such as is found in cnidarians  B) nerve cell ganglia

    C)having electrical impulses traveling in both directions  D) both A and C

    E) A,B and C


(2) After an action potential, the resting potential is restored by

    A) the opening of sodium activation gates.

    B) the opening of voltage-sensitive potassium channels and the closing of

       sodium activation gates.

    C) an increase in the membrane’s permeability to potassium and chloride

       ions.

    D) the delay in the action of the sodium-potassium pump.

    E) the refractory period in which the membrane is hyperpolarized.


(3) Consider a field plot containing 200 kg of plant material. Approximately

    how many kg of carnivore production can be supported?

    A) 200  B)100  C)20  D)10  E)2

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 163.15.178.1
推 thrush:(3)E earthscience版1724篇
噓 aeroufo:太懶了吧.....還是乖乖回去唸書吧
→ phenil:XD..有書不翻..你確定我們給的答案是對的嗎
推 joeg:ADE