Chapter 2 Flashcards

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1
Q

what works together to create human movement system?

A

nervous, skeletal, and muscular system.

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2
Q

what are the two parts of the nervous system and what do they do?

A

the central nervous system and peripheral nervous system. Senses an internal and external environment, collects info and interprets it to send back to the body so it can act accordingly

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3
Q

what is the central nervous system?

A

the part of the nervous system that is responsible for being the primary decision maker for the body

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4
Q

what is the peripheral nervous system and what does it do?

A

the PNS is made up of all of the nerves that extend from the CNS
and then acts as a messenger sending signals to and from the CNS

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5
Q

neurons are comprised of which three parts

A

cell body, axon, dendrites

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6
Q

what is the functional unit of the nervous system?

A

neuron

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7
Q

what are sensitive to changes in tensions and the rate of that change, protecting a muscle from possible injury?

A

muscle spindles
ie: sensing muscular length activating the muscle spindle causing the muscle to contract to avoid excessive tension or stretching

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8
Q

In the endocrine system, which of the following secretes hormones such as corticosteroids and catecholamines in response to stress?

A

thyroid gland

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9
Q

what sensory receptor will encourage a muscle to relax when excited?

A

golgi tendon organ, the muscle relaxes to avoid excessive tension

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10
Q

Which of the following is made up of the upper and lower extremities as well as the shoulder and pelvic girdles and encompasses approximately 126 bones?

A

the appendicular system

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11
Q

What are responsible for sensing distortion in body tissues through stretch, pressure and touch, and are located in muscles, tendons, ligaments, and joint capsules?

A

mechanoreceptors

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12
Q

Which term refers to a system of glands that secrete hormones into the bloodstream to regulate a variety of bodily functions and consists of host organs, chemical messengers, and target cells?

A

the endocrine system

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13
Q

The body’s ability to differentiate between walking on concrete and walking on sand is an example of which of the following functions of the nervous system?

A

sensory

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14
Q

Which of the following glands releases growth hormone during childhood up until puberty?

A

pituitary gland

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15
Q

What is the main characteristic of motor (efferent) neurons?

A

they stimulate muscle contraction and create movemement

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16
Q

which of the following is not a characteristic of (type 2) fast twitch muscle fibers?

A

slow to fatigue

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17
Q

which of the muscle fibers are most smaller in size, more mitochondrially dense, and receive the most oxygen?

A

type I

18
Q

Which of the following neurons transmit nerve impulses from effector sites (such as the muscles and organs) to the brain or spinal cord?

A

sensory (afferent) neurons

19
Q

what is skeletal muscle?

A

enables us to move and control that movement through joints

20
Q

what are the two subdivisions of skeletal muscles

A

type I (slow twitch), type II (fast twitch)

21
Q

what is the main characteristic of slow twitch muscles

A

type I muscles are more resistant to fatigue for endurance purposes

22
Q

what is the main characteristic of fast twitch muscles

A

type II muscles contract quickly to generate more power

23
Q

what are the two major functions for muscles

A
  1. leverage for muscles

2. provide support and effect posture

24
Q

what is the function of a sensory neuron?

A

receive information from the bodies environment and send it to the central nervous system

25
Q

what is the function of an interneuron?

A

carry and interpret information between the sensory and motor neurons

26
Q

what is the function of motor neurons?

A

send messages from the muscles to the brain and then to the effector sites, to provide a desired motor response (movement)

27
Q

what is the agonist?

A

prime mover, usually large muscles

28
Q

what is the antagonist?

A

works opposite of the agonist, (prime mover). Gets in the way and decelerates the agonist movement

29
Q

what is the synergist muscle?

A

assist the prime mover. Can be negative if the agonist muscle becomes to fatigued, the synergist muscle/ s will take over and can cause bad form/ injury

30
Q

what is a stabilizer muscle?

A

prevents unwanted motion or bad form by stabilizing the prime mover

31
Q

what term refers to the motion of a joint?

A

arthrokinematics

32
Q

what are the fibrous connective tissues that connect bone to bone and provide static and dynamic stability as well as input to the nervous system referred to?

A

ligaments

33
Q

according to sliding filament theory, when does muscular contraction occur?

A

actin and myosin filaments slide past each other, shortening the entire sarcomere

34
Q

what is produced primarily in the ovaries in the female and in small amounts in the adrenal glands in males?

A

estrogen

35
Q

which of the following consists of a series of irregularly shaped bones divided into five different categories depending on where they are located in the backbone?

A

vertebral column

36
Q

which of the following catabolic hormone secreted by the adrenal glands and serves to maintain energy supply through the breakdown of carbohydrates, fats, and protein?

A

cortisol

37
Q

what is true of type I, slow twitch muscle fibers?

A

they contain more capillaries, mitochondria, and myoglobin than type II muscle fibers

38
Q

what is a characteristic of joint receptors in the human body?

A

they respond to pressure, acceleration, and deceleration of joints

39
Q

which systems accomplish human movement through their functional integration>

A

muscular, nervous, and skeletal systems

40
Q

which gland produces the hormones (epinephrine and norepinephrine) that help prepare the body for activity and for the fight or fight response?

A

adrenal glands

41
Q

where is insulin and glucagon secreted and what is its purpose?

A

the pancreas; regulate blood glucose for use by all bodily cells for energy production