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marysya [2.9K]
3 years ago
5

If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells, _______

_.
a) it would be much longer before cardiac cells could respond to a second stimulation
b) contractions would last as long as the refractory period pacemaker cells would cease to spontaneously depolarize
c) tetanic contractions might occur, which would stop the heart's pumping action
Biology
1 answer:
WINSTONCH [101]3 years ago
7 0

Answer:

Answer is C. Tetanic contraction might occur which would stop the heart's pumping action.

Explanation:

Tetanic contraction occurs when the muscle fiber doesn't fully relax before it contracts again due to repeated stimuli at short intervals.

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A PICC line is a short catheter inserted into the jugular vein. A PICC line is a catheter that allows for infusion of intravenou
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Answer:

A PICC line is a long catheter inserted through the veins of the antecubital fossa.

Explanation:

PICC (peripherally inserted central catheter) that are mainly used as a part of chemotherapy for the administration of the particular substances. This can be used for the long period of time in the individual.

The long catheter is inserted in the body through the skin mainly at the peripheral site of the body. This can be inserted for the weeks depending on the severity of treatment. The veins of the antecubital fossa is used for the insertion of the tube.

Thus, the correct answer is option (3).

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4 years ago
Question 4 ​the average daily dietary fiber recommendations are _____ for males and females, respectively.
Aleks [24]
The average daily dietary fiber recommendations are 38 grams and 25 grams for male and females respectively. Dietary fiber is the indigestible portion of food that is usually derived from plants. It includes soluble fibers found in peas, beans, apples among others and the insoluble fiber, which promotes the movement of material through the digestive system and increases the bulk of the stool. 
7 0
3 years ago
1
algol13

The enzyme will be transported to either the cytoplasm or the mitochondria to perform the functions.

<h3><u>Explanation:</u></h3>

Cellular respiration is the process by which a living cell burns nutrients like glucose, fats, or even proteins to produce energy molecules namely ATP to perform its daily works. This cellular respiration, which is mainly aerobic, takes place both in cytoplasm and mitochondria.

The glycolysis part of the cellular respiration takes place in the cytoplasm. The enzymes that take part in the glycolysis cycle reaches to cytoplasm from ribosome to perform.

But both the Kreb's Cycle and the Electron Transport chain take place in mitochondria. Kreb's Cycle takes place in mitochondria matrix and ETC takes place in inner mitochondrial membrane. Although ETC isn't a enzymatic process, Kreb's Cycle is fully enzymatic and the enzymes reaches from ribosomes inside mitochondria by transporters.

6 0
3 years ago
Substances transported by facilitated diffusion
Alinara [238K]

Answer:

I think it is B

Explanation:

hope it is right!

4 0
3 years ago
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Nicotine from cigarette smoke acts as a ligand and associates with the acetylcholine receptor on specific cells in the nervous s
Vitek1552 [10]

Answer:

The correct order of events is:

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B) An influx of ions carries the signal to the reward areas of the brain.

D) The signal causes release of dopamine in the brain, which causes good feelings.

E) Nicotine is quickly eliminated from the body (causing cravings for more cigarettes to produce good feelings).

Explanation:

Nicotine acts on acetyl cholinergic receptors that are located in membranes of the midbrain neurons. Nicotine can activate those receptors or block them more efficiently than acetylcholine.   Stimulation of nicotinic receptors leads to an increase in ions flow that reaches the brain and causes dopamine release in the nucleus accumbens through axonal prolongations of the dopaminergic pathway. This response is responsible for the smoker´s recompense sensation.

The dopaminergic pathway is the most important way in the process of nicotine dependence and addiction to the drug.  

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