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erma4kov [3.2K]
3 years ago
13

Myocardial cells have long refractory periods in order to ensure each contraction is____. This is

Biology
1 answer:
koban [17]3 years ago
7 0

Answer:These contractile elements are virtually identical to skeletal muscle. ... (a) Cardiac muscle cells have myofibrils composed of myofilaments arranged in sarcomeres, ... The refractory period is very long to prevent the possibility of tetany, a ... At this point, the calcium ion channels close and K+ channels open, allowing outflux ..

Explanation:

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Will mark brainliest!!!!
UkoKoshka [18]

That's intimidating, lol!

Okay so choice A says that #8 is heterozygous for the trait which means for example it would have the genotype Aa. She's a female witht he dominant trait. This is a possibility.

Choice B says #10 is heterozygous, but if it has the recessive trait it would have to have the geotype aa which is homozygous so this one is wrong.

Choice C says #13 is homozygous dominant which means the genotype will be AA. The individual can still have the dominant trait without having the AA genotype (it can also be Aa) so this one is wrong.

Choice D says that #3 is homozygous dominant but like with choice C, the chart doesn't specify the genotypes of each so it'd be a guess to say that #3 is homozygous. This is wrong.

This means that choice A is true!

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3 years ago
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What part of a blade of grass allows the grass to stand up
Arisa [49]

Answer:

cellulose

Explanation:

8 0
3 years ago
Which statement about fungal cell walls is false? Fungal cell walls are similar in function to the cell walls of many protists,
Lerok [7]

Answer:

Cell walls prevent cells from dying in hypertonic conditions.

Explanation:

The cell wall is a rigid structure, essential for the survival of fungi, and knowledge of its composition may be useful for the development of new antifungal drugs. This wall does not alter the characteristics of the fungus, it stimulates and presses the fungus to flourish.

The fungal cell walls are similar in function to the cell walls of many protists, bacteria and plants. They prevent cells from bursting in hypotonic environments, but are unable to prevent cells from dying in hypertonic conditions. These cell walls also provide the cell with a degree of physical environmental protection and differ in the molecular composition of plant cell walls, as the fungal cell walls are chitin, while the plant cell walls are formed by cellulose.

3 0
4 years ago
Where should the breastplate on the restraint straps rest in the infant?
fomenos
For the answer to the question above, the best part to place the breastplate to restraint an infant especially on cars in the armpit level. If you place it below. They might have a difficulty in breathing. Higher than armi. they might choke their neck. So the best place is in the Armpit level.
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3 years ago
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Will give brainlist
MAVERICK [17]

Answer: c deltas

Explanation: hope this helps

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3 years ago
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