What functions does the controlled contraction of muscles allow?
What will be an ideal response?
Controlled contraction of muscles allows (1) purposeful movement of the whole body or parts of the body (such as walking or waving your hand), (2) manipulation of external objects (such as driving a car or moving a piece of furniture), (3) propulsion of contents through hollow internal organs (such as circulation of blood or movement of a meal through the digestive tract), and (4) emptying the contents of certain organs to the external environment (such as urination or giving birth).
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A neuroscientist who investigates mindfulness is a:
A. Molecular neuroscientist B. Cognitive neuroscientist C. Cellular neuroscientist D. Systems neuroscientist E. Behavioral neuroscientist
List the structures of the upper respiratory system
A) nose, nasal cavity, paranasal sinuses, and pharynx B) nose, mouth, pharynx, and larynx C) pharynx, larynx, and trachea D) trachea, bronchi, bronchioles, alveoli E) glottis, larynx, trachea, and bronchi
Why is vitamin D production by the skin important to the body?
A. Vitamin D protects the skin from UV light. B. Vitamin D is necessary for calcium absorption. C. Vitamin D adds strength to the skin, making it hard to penetrate. D. Vitamin D protects the skin from pathogens.
What is the functional unit of a skeletal muscle called?
A) a sarcomere B) a myofilament C) a myofibril D) the sarcoplasmic reticulum