How are cardiac and smooth muscles similar? A) Both have only thin protein filam

Question

How are cardiac and smooth muscles similar? A) Both have only thin protein filaments. B) Both are typically under conscious control. C) Both are involuntary. D) Both are connected to bones. It is important that the mammalian atrioventricular (AV) node produce a delay between the contraction of the atria and the contraction of the ventricles because this allows the A) Heart to rest for a brief period of time. B) Ventricles to fill to capacity. C) Oxygenated blood from the right atrium fills the cavumvenosum and cavumarteriosum and empties into the systemic arteries. D) Ventricles to contract together. 2 2. In Non-crocodilian reptiles, A) There is some mixing of blood, but outside of the ventricles B) Right atrium contracts slightly carlier than the left atrium C) Has neurogenic pacemaker. D) Between breaths the resistance gradually increases and is associated with a fall in blood flow to the lungs 5 3. 2

Explanation / Answer

1 Answer-

C) Both are involuntary

Explanation- Both of cardiac and smooth muscles are involuntary. Where thin proteins also need all muscles contraction. The conscious control used for voluntary movements and not connected to bones.

2 Answer-

b) Ventricles to fill to capacity

Explanation- The AV delays impulses by approximately 0.09s. It wants to delay in the cardiac pulse is extremely important. This ensures that the atria have ejected their blood into the ventricles first before the ventricles contract.

3 Answer-

a) There is some mixing of blood, But outside of ventricles.

Explanation- There is a hole between the right and left ventricles.

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