Neurotransmitters can affect postsynaptic cells by ________.

I) initiating signal transduction pathways in the cells

II) causing molecular changes in the cells

III) altering ion channel proteinsIII) altering ion channel proteins

IV) altering the permeability of the cells

#Question id: 11008

#Unit 7. System Physiology – Animal

Which of the following events is associated with the first heart sound?

#Question id: 9236

#Unit 9. Diversity of Life Forms

Which of the following outcomes is caused by excessive nutrient runoff into aquatic ecosystems?

#Question id: 27383

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement related to the atomic size Cl and Mg

#Question id: 7290

#Unit 5. Developmental Biology

Following figure regarding to regulatory network in the Arabidopsis shoot meristem stem-cell niche.

A. The transcription factor WUS is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the CLV3.

B. The transcription factor CLV3 is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the WUS.

C. Secreted CLV3 protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses WUS transcription.

D. Secreted WUS protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses CLV3 transcription.

Which of the following combination is correct?

#Question id: 10956

#Unit 7. System Physiology – Animal

The coagulation pathway that begins with tissue thromboplastin is