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OLga [1]
2 years ago
11

Blood passes through the left av valve as it moves from the _______ to the _______.

Biology
2 answers:
Tamiku [17]2 years ago
8 0

Answer:

left atrium; left ventricle

jarptica [38.1K]2 years ago
7 0

Answer:

The blood travels from the left atrium through the mitral (bicuspid) valve into the left ventricle.

Explanation: It is pumped out of the ventricle through the aortic valve into the aortic arch and throughout the systemic circulation.

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increasing intracellular cAMP leads to smooth muscle relaxation by: Group of answer choices inhibiting IP3 channels, leading to
kirza4 [7]

Answer:

1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.  

2. Increasing the relative activity of MLCP, leading to a decrease in tension.

3. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry.

Explanation

In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.

6 0
3 years ago
usaha yang dilakukan nabi Muhammad Saw agar kaum muslimin tetap aman dari siksaan kaum Quraisy adalah...​
Molodets [167]

Answer:

memerintahkan kaum muslimin untuk hijrah ke habasyah(Ethiopia)

Explanation:

-Dalam rombongan pertama hijrah, yaitu pada tahub ke lima kerasulan nabi muhammad, ada 15 orang.

10 laki lakin dan 5 perempuan yang hijrah ke habasyah dibawah komando ustman bin affan, termasuk istri ustman bin affan yaitu rukyah binti muhammad

-kemudian, pada rombongan ke dua, ada sekitar 81 orang, yang terdiri dari 80 laki laki dan 1 perempuan. perempuan tersebut adalah ummu habibah yang merupakan istri dari abu sofyan

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3 0
3 years ago
Pretend that you are a carbon atom. Write a short story (around two paragraphs) that describes your journey through the carbon c
Amiraneli [1.4K]
Well 1, why would I pretend that I was a carbon atom. 2, I’m to tired to, 3, just no.
4 0
3 years ago
Why social relationships are necessary for the survival of human being​
prisoha [69]

Answer:

They help you live longer

Explanation:

Research has shown that social connections not only impact your mental health, but your physical health as well. A review of 148 studies (308,849 participants) indicated that individuals with stronger social relationships had a 50% increased likelihood of survival.

3 0
3 years ago
What is found in group 1 and 4 on the Periodic table
Mazyrski [523]

Answer:

Group 1 - Alkali metals; Group 4 - Elemental Properties

Explanation:

The elements in Group 1 are called Alkali metals and those are: Lithium, Potassium, Rubidium, Celsium, Francium and Sodium and the elements in Group 4 are called: Titanium, Hafnium, Zirconium and Rutherfoundium.

It's important that group 4 has no trivial name like the group 1 does, it belongs to the grouping of <em>transition metals </em>and those metals have several general properties. They are found in the middle of the periodic table.  

3 0
3 years ago
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