Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
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▹ Answer
<em>See below.</em>
▹ Step-by-Step Explanation
Genes - parts of the DNA which control the traits of an organism
DNA - molecule that carries the genetic instructions for all living organisms. Found in the chromosome.
Nucleus - stores the cell's hereditary material or DNA
Chromosomes - Thread-like structures that are found in the nucleus of a cell that contains DNA.
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Brainliest is greatly appreciated!
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<span>I think the correct answer among the choices listed above is option C. The organism described most likely is a starfish. This is because annelids and mollusks exhibit spiral holoblastic cleavage while the echinoderms have radial holoblastic cleavage.</span>
What?? what are you trying to say please be more specific
Answer:
Calcium voltage gated ion channels
Explanation:
There are two types of ion channels involved in the neuromuscular junction and end plate potentials: voltage-gated ion channel (responsive to changes in membrane voltage which cause the voltage gated ion channel to open) and ligand-gated ion channel (responsive to certain molecules such as neurotransmitters).
The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles to release acetylcholine via exocytosis into the synaptic cleft.
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