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Head and Neck Movement Animation

By: Administrator, Views: 334

Interestingly, head and neck muscles are the first ones that the baby can control. A baby can hold his head up before he can sit erect. The muscles of the head and neck perform many important tasks, including movement of the head and neck, chewing and swallowing, speech, facial expressions, an...

Humerus Adduction Animation

By: Administrator, Views: 10291

Types of body movement that occur at the diarthrotic joints: - Abduction - Adduction - Circumduction - Dorsiflexion Movement can occur in one plane, like with a knee bend, or in multiple planes such as with a shoulder roll. Adduction occurs when a joint moves a part of the body toward the ...

Elbow Pronation Animation

By: Administrator, Views: 473

The elbow pronation test is performed by placing a hand on the elbow, flexing the carpus to 90 degrees, and rotating the toes out (thus inwardly rotating the antebrachium), which places stress on the medial compartment of the elbow. Pronation – Lying prone (face downward); also turning the p...

Secondary and tertiary levels of protein structure Animation

By: HWC, Views: 1661

Amino acid sequence dictates a protein's final shape. The presence of certain amino acids favors a pattern of hydrogen bonding that causes part of the polypeptide chain to coil and twist into an alpha helix. The presence of other amino acids enables hydrogen bonding between strand like re...

Carbon fixing adaptations Animation

By: HWC, Views: 1822

Different plants trap carbon by different pathways. Most C3 plants evolved in moist, temperate zones. On hot dry days they close their stomata to conserve water and oxygen accumulates. Under these circumstances, the enzyme rubisco uses oxygen in an inefficient reaction that competes with t...

Wrist Circumduction Animation

By: Administrator, Views: 1240

Circumduction is sometimes described as simply a "circular movement" because circumduction movements of (e.g. the arm and hand) result in the outer edge of the limb (e.g. the fingertips) tracing circles in space. Another way to express this is to say that circumduction is the movement of the dist...

What are the Parts of a Plant Cell?

By: HWC, Views: 6798

Every chloroplast in a plant cell is packed with stacks of flattened sacs called thylakoids. The thylakoid membranes contain chlorophyll, as well as most of the other components required for the light reactions of photosynthesis. The chlorophyll-containing structures within the membranes are c...

Contraction and Relaxation Animation

By: Administrator, Views: 10660

Muscles are responsible for movement. The types of movement are: - Locomotion, when chemical energy is changed into mechanical energy. - Propulsion of substances through tubes, as in circulation and digestion. - Changes in the sizes of openings, as in the contraction and relaxation of the iris...

Neural regulation of mechanical digestion- CNS voluntary, ANS & ENS controlled involuntary movements

By: HWC, Views: 7714

• The gastrointestinal [GI] tract is basically a muscular tube that contains and processes food as it moves from the mouth to the anus. • Mechanical digestive functions consist of both voluntary and involuntary muscle contractions and relaxation including: • Chewing and swallowing food....