Answer:
Catalysts are substances that increase or decrease the rate of a chemical reaction but remain unchanged. Enzymes are proteins that increase rate of chemical reactions converting substrate into product.
Explanation:
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Answer:
1. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body. Normally, the flexible, round red blood cells move easily through blood vessels. In sickle cell anemia, the red blood are shaped like sickles or crescent moons.
Treatments: Blood transfusion
Symptoms: Pain
2. Diabetes is the <u>condition in which the body does not properly process food for use as energy</u>. Most of the food we eat is turned into glucose, or sugar, for our bodies to use for energy. The pancreas, an organ that lies near the stomach, makes a hormone called insulin to help glucose get into the cells of our bodies.
3. Acne is a skin condition that occurs when your hair follicles become plugged with oil and dead skin cells. It causes whiteheads, blackheads or pimples. Acne is most common among teenagers, though it affects people of all ages.
Im not sure but im guessing its B)
Answer:
According to the sliding-filament model of contraction, the muscle contraction occur due to the myosin heads propel the actin myofilaments toward the center of the sarcomere. This pulls the Z disks closer together, shortening sarcomere and the entire muscle
Explanation:
In the muscle fiber there are two proteins that facilitate the process of contraction, myosin and actin. Myosin is thicker and more abundant than actin, and its interaction is responsible for the process of muscle contraction.
Both molecules, myosin and actin, form bonds -called cross bridges- where the myosin heads produce the mobilization of actin towards the center of the sarcomere. Z discs are associated with actin myofibrils, so they come close, and promote the shortening of the sarcomere.
This process requires the action of calcium ions, which depolarize the muscle cell and consume energy in the form of ATP.
It should be noted that the myosin and actin molecules do not change their length, but their action causes the muscle fibers to shorten during contraction.
Learn more:
Types of muscle contraction brainly.com/question/7117064
Answer:
B. people notice little about the message that they are supposed to ignore
Explanation:
In dichotic listening task people are able to concentrate on one voice while ignoring the other. It is observed that during dichotic listening task people concentrate more on one task than other. Sometimes dichotic listening task is used to examine the selective attention of brain. In the test the person is subjected to two voices simultaneously over the headphones and asked to pay attention either one or both voices. Then he is aked questions about the content.
Example; If you are talking on the phone with someone in a room filled with voices of other people, you would be able to listen and concentrate at the voice on the phone while ignoring the other voices because of dichotic listening.
Example; If you are attending a seminar of a psychology professor and some peoples are talking in the hall you would be able to concentrate on the voice of the professor because of dichotic listening.
