“cells seemed to he enveloped by a selectively permeable layer that allowed different substances to enter and leave cells at significantly different rates. He recognized that lipid-soluble substances penetrated readily into cells, whereas water-soluble substances did not. He concluded that lipids were present on the cell surface as some sort of a "coat." Irving Langmuir (1881-1957) proposed that that cells were covered by a lipid monolayer.”
Answer: The earth's atmosphere support life on earth by protecting us from the UV rays and slows down asteroids before they hit the earth. And protects us from much more stuff.
Explanation:
Answer:
e. All of the choices describe characteristics of the ANS.
Explanation:
The autonomic nervous system is a regulatory and control system that influences the functions of internal organs.
Autonomic pathways consist of two types of motor neurons, these are the preganglionic neuron and the postganglionic neuron.
ANS stimulation of involuntary effectors is always excitatory. In the preganglionic autonomic neurons, and all postganglionic parasympathetic neurons are usually (cholinergic i.e receptors that bins with acetylcholine), as a result they release acetylcholine as a neurotransmitter. The cholinergic effects of preganglionic autonomic neurons are always excitatory.
The postganglionic neuron lies entirely in the peripheral nervous system.Yes!, this is so because the ganglion cells that give rise to postganglionic axons lies through the gray rami communicans and join the peripheral nerves of the peripheral nervous system.
Gymnosperms and angiosperms have flowers! ferns and bryophytes
Answer:
An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder.
