【单选题】Of the events that lead to myofilaments sliding over each other, which of the following happens first in skeletal muscle?
A.
The myosin head engages with the binding site on actin
B.
Troponin changes shape and pulls on tropomyosin
C.
Calcium ions enter the cell cytoplasm
D.
ATP is hydrolysed to ADP and inorganic phosphate
【单选题】建设工程总投资,一般指进行某项工程建设花费的全部费用。生产性建设工程总投资包括建设投资和( )部分,非生产性建设工程投资只包括建设投资。
【单选题】The muscle cell is an elongated cell, which is commonly called a muscle fiber.
A.
skeletal … mononucleate
B.
skeletal … multinucleate
C.
cardiac … multinucleate
D.
cardiac … mononucleate
【单选题】哪个进制是在 IPV6 地址表示法中使用
【单选题】某医学研究数据有一端没有确定值,描述其集中趋势适用的统计是: ( )
【多选题】翻译:A.epithelial tissue ; B.nervous tissue;nervecell; neuron; neuroglial cell; nerve fiber C.muscle tissue; skeletal muscle; cardiac muscle; smooth muscle D. loose connective tissue; dense connect...
B.
神经组织;神经细胞;神经元;神经胶质细胞;神经纤维
【单选题】Which ion below is supposed to trigger the contraction of the skeletal muscle cell ( )
【单选题】With the transmission electron microscope skeletal muscle fibers can be seen to contain structures called triads. What do the two lat- eral components of a triad represent?
A.
Attachment sites for thick myofilaments
B.
Sites for calcium sequestration and release
C.
Sites for impulse conduction into the fiber
D.
Sites for ATP production
E.
Sites for synthesis of proteins to be secreted outside the cell
【单选题】The main difference between ventricular myocyte action potentials and skeletal muscle cell action potentials is
C.
There is a platform period
D.
Short repolarization time
【判断题】一切条件反射都是在无条件反射的基础上形成的。( )