Which is wrong about the transcellular signaling of NO or CO?
A: NO can penetrate endothelial cells and induces smooth muscle extension
B: CO can affect presynaptic neurons, adjacent neurons, or glial cells
C: both of them can stimulate cGMP synthesis
D: both of them have receptors on the target cell membrane
A: NO can penetrate endothelial cells and induces smooth muscle extension
B: CO can affect presynaptic neurons, adjacent neurons, or glial cells
C: both of them can stimulate cGMP synthesis
D: both of them have receptors on the target cell membrane
举一反三
- Which is wrong about long-term habituation and sensitization? A: long-term sensitization involves synaptic facilitation B: synthesis of mRNA and proteins are required for memory consolidation from short-term to long-term C: growth of new synaptic connections can be observed in long-term habituation D: both involve structural changes in the presynaptic terminals of sensory neurons
- Which of the following about cell cycle is NOT true？（ ） A: We can get the synchronization of the cells by blocking DNA synthesis by TdR. B: Cytokinesis of animal cells is mediated by a contractile ring of actin and myosin II filaments. C: Meiosis II is similar to meiosis I. D: According to the characteristics of cell division, cell groups can be divided into three types, such as Cycling cells, Terminally Differentiated cells and Quiescent cell.
- Which of the following narrative about hormones is wrong? ____ A: Hormones are highly bioactive substances secreted by various glands in the body B: Most hormones are transported to target cells long distance away through blood circulation C: Some hormones can diffuse to adjacent cells through tissue fluid D: Hormones secreted by nerve cells can reach the adenohypophysis through the pituitary portal vein
- which cell can only exit in small intestine: A: endocrine cells B: stem cells C: goblet cells D: Paneth cells E: absorptive cells
- Which of the following cells in the testis contain the most smooth endoplasmic reticulum?() A: Spermatogonium B: Leydig cell C: Smooth muscle cell D: Sertoli cell E: Spermatid