Question: What Is The Cause Of Latent Period?

What happens latent period?

latent period – no change in length; time during which impulse is traveling along sarcolemma & down t-tubules to sarcoplasmic reticulum, calcium is being released, and so on (in other words, muscle cannot contract instantaneously!) contraction period – tension increases (cross-bridges are swivelling).

What disease has the longest incubation period?

Examples for diseases in humansDiseasebetweenperiodHIV2weeks to months, or longerInfectious mononucleosis (glandular fever)28daysInfluenza1daysKuru disease10.3years (mean)28 more rows

Do all muscle fibers contract at the same time?

Each muscle fiber contracts on an “all or nothing” principle; a muscle fiber either contracts fully or not at all, and all the fibers in a single motor unit contract at the same time. When a muscle is required to contract during exercise, not all motor units are contracted at the same time.

What is the difference between latency period and incubation period?

This stage of subclinical disease, extending from the time of exposure to onset of disease symptoms, is usually called the incubation period for infectious diseases, and the latency period for chronic diseases. During this stage, disease is said to be asymptomatic (no symptoms) or inapparent.

What virus has the shortest incubation period?

Missing from the table (which will be corrected in the next edition) is the incubation period of Ebola virus, which is 2 to 21 days. I would also argue that the incubation period of HIV is not 1-10 years, but 2-4 weeks, the time until the prodromal symptoms occur.

What does the latent period of a Myogram indicate?

A Myogram of a Muscle Twitch A single muscle twitch has a latent period, a contraction phase when tension increases, and a relaxation phase when tension decreases. During the latent period, the action potential is being propagated along the sarcolemma.

What causes rigor mortis?

Rigor mortis is due to a biochemical change in the muscles that occurs several hours after death, though the time of its onset after death depends on the ambient temperature. The biochemical basis of rigor mortis is hydrolysis in muscle of ATP, the energy source required for movement.

What is latent period quizlet?

Latent period is the period of time between the generation of an action potential in a muscle cell and the start of muscle contraction. Describe the process of excitation-contraction coupling in skeletal muscles fibers.

Which muscle cells have the greatest ability to regenerate?

Cardiac muscle can also hypertrophy. However, there are no equivalent to cells to the satellite cells found in skeletal muscle. Thus when cardiac muscle cells die, they are not replaced. Smooth cells have the greatest capacity to regenerate of all the muscle cell types.

What does long latency period mean?

Listen to pronunciation. (LAY-ten-see PEER-ee-ud) The time that passes between being exposed to something that can cause disease (such as radiation or a virus) and having symptoms.

Does the latent period change with different stimulus?

Latent period is the time preparing for contraction. Contraction is when muscle tension peaks. The relaxation period is at the end of muscle contraction. The latent period did not change with changes in stimulus voltage.

What happens if the latent period for an infection is longer than the incubation period?

If the latent period is longer than the incubation period, then people are infectious only after symptoms start. This means they can be recognised as being ill before they are infectious.

What is latent period of virus?

Latency is the phase in certain viruses’ life cycles in which, after initial infection, proliferation of virus particles ceases. However, the viral genome is not eradicated.

What is true latent period?

“True” Latency. —The interval after the beginning of the electrical response during which the mechanical conditions are unaltered. This is the same whether thickening is recorded, or whether determined by the response of the tendon, and has an absolute value 1·5 to 2·0σ.

What is happening during the latent or lag phase?

The time between the activation of a motor neuron until the muscle contraction occurs is called the lag phase (sometimes called the latent phase). During the lag phase a signal called an action potential moves to the end of the motor neuron (axon terminal).