Nerve and Muscle Physiology — Flashcards

Flashcard 51: Which type of muscle fibres undergo hypertrophy ONLY?_____

Answer: Skeletal, Cardiac

Flashcard 52: _____ is a result of stretch reflex-inverse stretch reflex sequence

Answer: Clonus

Flashcard 53: Mechanism of cadaveric _____ is reduction of ATP

Answer: rigidity (spasm/rigidity)

Flashcard 54: Changes in muscle strength at the onset of muscle contraction due to repeated stimulus known as _____ effect

Answer: staircase

Flashcard 55: EMG reveals a classical _____ pattern in infantile epileptic spasm

Answer: rhomboid

Flashcard 56: What type of muscle fibres do not have striations, troponin or T tubules?_____

Answer: Smooth muscle

Flashcard 57: Contraction and relaxation period in a preloaded muscle contraction is _____ than afterloaded muscle contraction

Answer: Longer

Flashcard 58: Sympathetic stimulation (norepinephrine) of a smooth muscle produces _____ potentials and relaxation.

Answer: inhibitory (excitatory/inhibitory)

Flashcard 59: In the retina, which cells are the only ones to develop propagated action potentials?

Answer: Ganglion cells

Extra: While most retinal cells (photoreceptors, bipolar, horizontal, and amacrine cells) communicate via graded potentials, ganglion cells generate action potentials to transmit signals along the optic nerve to the brain.

Flashcard 60: Stretch reflex:When _____ occurs, intrafusal and extrafusal fibers shorten together, and spindle afferent activity can occur throughout the period of muscle contraction

Answer: coactivation