The thoracic nerves are also called the
a) brachial nerves.
b) lumbar nerves.
c) sacral nerves.
d) cervical nerves.
e) intercostals nerves.
e
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All of the following are factors that influence synovial joint stability EXCEPT?
A) structure and shape of the articulating bone B) strength and tension of joint ligaments C) arrangement and tension of the muscles D) number of bones in the joint
Prostaglandins are secreted in high concentration into semen by the prostate gland
Indicate whether the statement is true or false.
Explain the functional significance of the T-tubules of the sarcolemma and the terminal cisternae of the sarcoplasmic reticulum
A) The increased surface of both structures increases the speed and efficiency with which the end-plate potential leads to sarcomere contraction. B) The abundance of each structure increases the rate of ATP production. C) The T-tubules and terminal cisternae enhance the chemical attraction between myosin and actin. D) The increased surface area provides space for more ligand gated ion channels, thus increasing the effectiveness of acetylcholine binding.
Which statement is incorrect about cross bridges?
a. They are globular myosin heads that protrude from the thick filaments. b. They bend during muscle contraction. c. They attach and detach from actin during muscle contraction. d. They are not found in the I band. e. They bind with troponin during contraction.