Explanation:
a) p+e+n=18
mà p=e=z => 2p +n=18
câu a có thiếu dữ kiện không?
Answer:
All the above
Explanation:
Cardiac muscle tissue is only found in your heart, where it performs coordinated contractions that allow your heart to pump blood through your circulatory system.
A calcium-rich diet is good for your bones, and calcium helps to build and protect them.
Red blood cells, most white blood cells, and platelets are produced in the bone marrow.
The feature that separates hominids from other primates is Complex social skills
Answer:
It's more likely to be similar to their parents,
Explanation: Due to the fact that the combined DNA of the parents helps decide what the offspring looks like, sounds like, what diseases they get & how their body functions. it's highly unlikely for it to be similar to one of the first cousins due to the fact that their mum/dad probably didnt mate with the mum/dad of the first cousin.
Answer:
The correct answers are: Synaptic Active Zones, Exocytosis.
Explanation:
- An impulse after travelling along the dendrites, cell body and axon of a neuron reaches the axon endings in the form of an action potential (signal transmitted by the activation of voltage gated sodium and potassium channels present on the plasma membrane of the neurons).
- At the axon ending or the pre-synaptic region, the action potential triggers the opening of the voltage dependent calcium channels, that promotes the influx of calcium ions into the pre-synaptic region of the neuron.
- This process triggers the fusion of the neuro-transmitter carrying vesicles with the plasma membrane in the pre-synaptic region of the neuron.
- As a result of fusion the neurotransmitter is released into the synaptic cleft.
- At the pre-synaptic region of the neuron, there is a huge concentration of neuro-transmitter carrying vesicles which remain adhered to proteins called CAZ (cytomatrix at the active zone) proteins. These proteins help the neurotransmitter carrying vesicles to remain tethered or docked to the pre-synaptic membrane in the axon terminal of the neuron. They together form the Synaptic Active Zone.
- In response to calcium ion influx these proteins help the neurotransmitter carrying vesicles to fuse with the plasma membrane in the pre-synaptic region of the neural axon and release the neurotransmitter into the synaptic cleft.
- The process of fusion of the neurotransmitter carrying vesicles with the plasma membrane in the pre-synaptic region of the neural axon followed by the release of the neurotransmitter into the synaptic cleft is known as Exocytosis.
