Four of the five answers listed below are types
of intercellular connections. Select the
exception.
a. tight junctions
b. gap junctions
c. plasmodesmata
d. adhering junctions
e. plasmalemma
E
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Muscle contraction is regulated by:
A. depletion of acetylcholine, which returns the ligand-gated ion channel to the resting, closed conformation, preventing further transport of sodium ions. B. an ATP-powered sodium pump in the plasma membrane that continuously works to set up a sodium concentration gradient. C. an enzyme that degrades and removes acetylcholine from the neuromuscular junction. D. the resting neuron that does not release acetylcholine into the neuromuscular junction. E. All of these choices are correct.
Which of the following functions like a fence to block membrane protein movement between the apical and basolateral regions of an intestinal epithelial cell plasma membrane?
A) gap junctions B) desmosomes C) adherens junction D) hemidesmosomes E) tight junction
_______ in the liver may play a role in producing the enzymes that help detoxify drugs.
A) mitochondria B) rough endoplasmic reticulum C) smooth endoplasmic reticulum D) Golgi apparatus
What is the function of the brachial artery?
a. It receives blood from the brain. b. It receives blood from veins of the upper body. c. It services the cardiac muscle cells. d. It delivers blood to the upper limbs. e. It delivers blood to the head, neck, and brain.