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Ira Lisetskai [31]
3 years ago
9

Robert hooke coined the term cell when studying thin slices of cork. These ________ were the first cells observed because ______

__.
Biology
1 answer:
Brrunno [24]3 years ago
4 0

Robert hooke coined the term cell when studying thin slices of cork. these Dead

Plant Cells were the first cells observed because the thick cells.

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Find the LCM of two numbers if there product is 160 and hcf is 4.​
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Answer:

40

Explanation:

given

product of two numbers =160

hcf =4 we know that

hcf*LCM=product of the numbers

LCM*4=160

LCM=160/4

LCM=40

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Answer:

A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles.Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle cell. Skeletal muscle tissue is composed of cells called muscle fibers. When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber. That starts a chemical reaction within the muscle.Acetylcholine Is Released and Binds to Receptors on the Muscle Membrane.

A multistep molecular process within the muscle fiber begins when acetylcholine binds to receptors on the muscle fiber membrane. The proteins inside muscle fibers are organized into long chains that can interact with each other, reorganizing to shorten and relax. When acetylcholine reaches receptors on the membranes of muscle fibers, membrane channels open and the process that contracts a relaxed muscle fibers begins:

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The sodium influx also sends a message within the muscle fiber to trigger the release of stored calcium ions.

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Explanation:

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