Answer:
Our sensorimotor system appears to be influenced by the recent history of our movements. Repeating movements toward a particular direction is known to have a dramatic effect on involuntary movements elicited by cortical stimulation—a phenomenon that has been termed use-dependent plasticity. However, analogous effects of repetition on behavior have proven elusive. Here, we show that movement repetition enhances the generation of similar movements in the future by reducing the time required to select and prepare the repeated movement. We further show that this reaction time advantage for repeated movements is attributable to more rapid, but still flexible, preparation of the repeated movement rather than anticipation and covert advance preparation of the previously repeated movement. Our findings demonstrate a powerful and beneficial effect of movement repetition on response preparation, which may represent a behavioral counterpart to use-dependent plasticity effects in primary motor cortex.
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Answer:
Because if they mate with another carrier of the recessive trait, then the offspring is at risk of having the trait.
Explanation:
Answer:
Billie or Taylor ? ... ...
Answer:
Estoy respirando aire, no mucho
Answer:
a
Explanation:
Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Smoking also increases the risk of tuberculosis, certain eye diseases, and problems with the immune system, including rheumatoid arthritis.
Other effects of tobacco smoke on the body include:
- irritation and inflammation of the stomach and intestines
- increased risk of painful ulcers along the digestive tract
- reduced ability to smell and taste
- premature wrinkling of the skin
- higher risk of blindness
- gum disease (periodontists).
The effects of tobacco smoke on the musculoskeletal system include:
- tightening of certain muscles
- reduced bone density.
The effects of tobacco smoke on the immune system include:
- greater susceptibility to infections such as pneumonia and influenza
- more severe and longer-lasting illnesses
- lower levels of protective antioxidants (such as vitamin C), in the blood.
The effects of tobacco smoke on the circulatory system include:
- raised blood pressure and heart rate
- constriction (tightening) of blood vessels in the skin, resulting in a drop in skin temperature
- less oxygen carried by the blood during exercise
- ‘stickier’ blood, which is more prone to clotting
- damage to the lining of the arteries, which is thought to be a contributing factor to atherosclerosis (the buildup of fatty deposits on the artery walls)
- reduced blood flow to extremities (fingers and toes)
- risk of stroke and heart attack due to blockages of the blood supply.
The effects of tobacco smoke on the respiratory system include:
- irritation of the trachea (windpipe) and larynx (voice box)
- reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages
- impairment of the lungs’ clearance system, leading to the buildup of poisonous substances, which results in lung irritation and damage
- and increased risk of lung infection and symptoms such as coughing and wheezing
- permanent damage to the air sacs of the lungs.
Highly damaging components of tobacco smoke include:
- Tar– is the word for the solid particles suspended in tobacco smoke. The particles contain chemicals, including cancer-causing substances (carcinogens). Tar is sticky and brown, and stains teeth, fingernails, and lung tissue
- carbon monoxide – is a poisonous gas. It is odorless and colorless and, in large doses, quickly causes death because it takes the place of oxygen in the blood. In people who smoke, the carbon monoxide in their blood makes it harder for oxygen to get to their organs and muscles
- oxidizing chemicals – which are highly reactive chemicals that can damage the heart muscles and blood vessels of people who smoke. They react with cholesterol, leading to the buildup of fatty material on artery walls. Their actions lead to heart disease, stroke, and blood vessel disease
- metals – tobacco smoke contains several metals that cause cancer, including arsenic, beryllium, cadmium, chromium, cobalt, lead, and nickel
- radioactive compounds – tobacco smoke contains radioactive compounds that are known to be carcinogenic.
People who use e-cigarettes are more likely to experience side effects such as:
- Coughing.
- Dizziness.
- Dry mouth or a scratchy throat.
- Headaches.
- Loss of taste or changes in taste.
- Shortness of breath.
