Muscle contraction ends when calcium ions are pumped back to the sarcomere. During stimulation of the muscle cell, the motor neuron releases the neurotransmitter acetylcholine which travels across the neuromuscular junction (the synapse between the terminal bouton of the neuron and the muscle cell).
Hellebore. Helleborus. Hellebores are so easy and so pretty, they have a place in nearly every landscape. Their exquisite bowl-or saucer-shape flowers in white (often speckled), pinks, yellows, or maroon remain on the plant for several months, even after the petals have fallen. Deer-resistant and mostly evergreen, hellebores' divided leaves rise on sturdy stems and may be serrated (like a knife) along the edges. Grow hellebores in shade where soil remains moist; some hellebores prefer acid or alkaline conditions, depending on variety.
Xerophyllum tenax is a North American species of plants in the corn lily family. It is known by several common names, including bear grass, squaw grass, soap grass, quip-quip, and Indian basket grass. Xerophyllum tenax has flowers with six tepals and six stamens borne in a terminal raceme.The plant can grow to 15â150 cm in height. It grows in bunches with the leaves wrapped around and extending from a small stem at ground level.The leaves are 30â100 cm long and 2â6 mm wide, dull olive green with toothed edges. The slightly fragrant white flowers emerge from a tall stalk that bolts from the base.he plant can grow to 15â150 cm in height. It grows in bunches with the leaves wrapped around and extending from a small stem at ground level. The leaves are 30â100 cm long and 2â6 mm wide, dull olive green with toothed edges. The slightly fragrant white flowers emerge from a tall stalk that bolts from the base.