Arrange the following sentences to describe the sequence of events that can occur during skeletal muscle contraction 1.Sodium channels open and sodium flows in. 2.Impulse reaches the axon's terminal. 3.ACh binds to receptors on the muscle cell membrane. 4.Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis. 5.If enough sodium moves in to the muscle cell, an impulse (action potential) develops.

i think the answer is c hope this

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.